Full Book MCQs - 2nd Year Biology
Notes Ki Dunya presents you full book MCQs on 12th class Biology. Click twice on the chapter, read the questions and click on the right option which you think. The green and red box will be shown meaning the right and wrong answer respectively. If the correcrt option is selected, only the green box will appear.
▶ Chapter 15 - Homeostasis
1. The protection of an internal environment from the harms of fluctuations is the definition of which of the followings?
2. The category of the plants that has adaptations of small and thick leaves to limit water loss are called:
3. The environment where the animals produce large volumes of diluted urine.
4. Which of the following is called as excretophore i.e. contributing mainly in the elimination of wastes in plants?
5. The excretory product that requires minimum water for its elimination compare to others.
6. The groups of animals whose excretory system is structurally associated with nutritive tract.
7. The excretory structures that deliver urine from kidney to urinary bladder.
8. The metabolic wastes that are ingested into the body and must be removed.
9. Which of the following is not endotherm?
10. Name the type of adaptations from the followings that responsible for shivering thermogenesis.
11. The excretory system of planaria is:
12. Which monitor the body temperature?
13. The end products of haemoglobin breakdown:
14. The chemical substances, responsible for raising human body temperature are:
15. In urea cycle, the detoxified form of ammonia is:
16. Hydrophytes posses:
17. The incidence of calcium phosphate stones in kidneys are:
18. The uric acid is excreted out as solid excreta in:
19. Major homeostatic function of liver is storage of:
20. Bat do not regulate body temperature in narrow range is:
21. A succulent plant have water stored in tissue:
22. Uric acid is produced from:
23. The arginine is split by arginase to form urea and the precursor:
24. The high level Herbicide.
25. Sharks excrete nitrogenous waistes in the form of:
26. The animals that generate their own body heat through heat production as by product during metabolism are called:
27. The major homeostatic function of liver is to synthesize:
28. In juxtamedullary nephrons additional capillaries extend down to form a loop of vessles called:
29. Which is an endotherm?
30. Number of Ammonia molecules required to produce one molecule of urea is:
31. A diluted solution compared to the cell concentration is termed as:
32. The central station of metabolism and the body's central metabolic clearing agent is:
33. Blood supplied to kidneys from each cardiac beat is:
34. Super cool cytosol, without ice formation, is caused
35. Which of the following act as homeostatic thermostat in humans?
36. Which of the following is not endotherm.
37. Anhydrobiosis refers to tolerate.
38. Mechanism which eliminates nitrogenous waste is referred as:
39. The nitrogenous waste which is highly toxic and dissolves quickly in body fluids is:
40. Cockroach and other insects remove their nitrogenous waste in form of:
41. The incidence of calcium oxalate type stons are:
42. The more concentrated external environment is termed is:
43. Which one is not a mesophyte?
44. The rate of heat production is increased by increasing muscle contraction, by movement it is called:
45. Which of the following is not synthesized in liver?
46. Animals that do not require to adjust their internal osmotic state actively are known as:
47. One gram of ammonia nitrogen requires how much water for excretion?
48. Animals of the group of flat worms have simple tubular excrertory system calles as:
49. Chemicals that cause fever and are produced from blood cells are:
50. Non-surgical removal of kidney stone is called:
▶ Chapter 16 - Support and Movements
1. Which of these is a direct source of energy for muscle contraction?
2. When muscle contracts:
3. Which of the following changes occur when skeletal muscle contracts.
4. Thin filament in myofibrils consist of:
5. The contraction of striated muscle is initiated by the release of energy in the presence of:
6. In the mammalian skeleton there is a distinct synovial joint between the:
7. Which of the following is a bone of axial skeleton?
8. Vertebral column includes:
9. In mammal the number of cervical vertebrae are:
10. Brain is protected by:
11. Which of the following is plantigrade?
12. Brachioradialis causes the up lift of:
13. Molting occurs in arthropods at the:
14. Muscle fatigue is caused by:
15. Cardiac muscles are:
16. Skeleton muscles are composed of:
17. The first cervical vertebrae is called:
18. Which one is bone of hind limb?
19. Which is stimulus for thigmotropism?
20. Which animals shows digitigrade mode of locomotion?
21. Plant movements due to external causes, are:
22. The group of cells usually lack secondary wall and have angular thickenings is:
23. Action of Venus Fly trap is an example of:
24. A bone which connects scapula with sternum:
25. Cramp is also known as:
26. The living cells of cartilage are called:
27. The membrane that bounds vacuole is called:
28. The hyphae of fungi show movements:
29. The number of bones in our wrist is:
30. Fibers are included in Pattern:
31. The vertebral column of human consists of vertebrae:
32. This type of wood is most resistant to decay and Insect attack:
33. Slightly elastic connective tissues that attach bone to bone are called:
34. An increase in plant girth due to the activity of vascular cambium is called:
35. Which one of the following is not a joint
36. Most efficient way of supporting the body is seen in:
37. Microtubules are composed of:
38. The inactive non-conducting wood is called:
39. Action of the Venus fly trap is:
40. Acute forms of arthritis usually result from:
41. Muscle is connected to bone by:
42. Thick filament in myofibril is made up of:
43. Complete immobilization of muscle leads to:
44. Which of the following is drifting animal:
45. In thoracic region, number of vertebrae is:
46. The supracoracoid muscles provide power for the:
47. Bowed legs and deformed pelvis are the symptoms of which disease in children?
48. Which is the end of muscle which remains fixed when the muscle contracts?
49 Which of the following animal has hydrostatic skeleton.
50. Rickets is due to deficiency of vitamin.
▶ Chapter 17 - Coordination and Control
1. The neuron net of Hydra lacks:
2. A nerve is a:
3. Thyroid glands produce:
4. What is the number of cranial and spinal nerves in Man:
5. The one which is not related to others is:
6. Which one of these ions is conserved by aldosterone preventing its loss from kidney tubules?
7. Nociceptors produce the sensation of:
8. Oxytocin harmone is produced by:
9. Which is not growth stimulant?
10. Temperature around 4°C stimualte production of:
11. Each type of cone cell in retina has specific light absorbing protein called:
12. Sodium uptake in nephron is promoted by:
13. Hyponasty caused by:
14. Abscisic acid promotes closing of stomata under conditions of:
15. The main neurotransmitter of brain is:
16. In pine apple, the flowering may be induced by:
17. Diffused type of nervous system in present in:
18. Hindbrain includes the medulla, pons and:
19. It is applied to Rubber plant to stimulate flow of Latex.
20. Vasopressin (anti-diuretic hormone) and oxytocin are:
21. Eustachian tubes connect throat with:
22. Plant hormone florigen is produced in:
23. The largest part of brain is:
24. Cerebral hemispheres communicate with each other by:
25. The maximum speed of nerve impulse in human being recorded is:
26. The structures which respond by the impulse coming from the motor neurons are called:
27. All are related to medulla oblongata, except:
28. In human mental illness disease is due to:
29. Endocrine glands secrete:
30. Path way of passage of impulse during reflex action is called:
31. During non-conducing state, the neuron membrane is permeable to efflux of:
32. In humans mid brain is:
33. Germinating pollen grain is rich source of:
34. The cerebrospinal fluid (CSF) is similar in composition to:
35. Which of the harmone suppresses ovulation.
36. Effective drug available for Parkinson's disease is:
37. In myelinated neurons, the impulse jumps from node to node and is called:
38. Which one produced in excess then leads to abnormal development called acromegaly.
39. Gastrin stimulates the secretion of:
40. Gonorrhoa is caused by:
41. Microscopic gap between the two neurons is called as:
42. Lack of insulin causes:
43. The processes conducting impulses away from the cell body are called:
44. Resting membrane potential of a neuron is.
45. The onset of epilepsy is usually before age of:
46. Alpha cells of pancreas secrete:
47. The corpuscles situated quite deep in the body and are in form of encapsulated neurons ending, receive deep pressure stimulus are:
48. Which of the following pain: receptors produce the sensation of pain:
49. Which animal has diffused nervous system?
50. The movement in response to stimulus of touch i-e climbing vines, is called:
▶ Chapter 18 - Reproduction
1. Reproduction is very important to the survival of:
2. In plants photoperiod and temperature affect:
3. Developing seeds are rich source of:
4. Common methods of sexual reproduction are:
5. Photoperiod affects flowering when shoot meristem starts producing.
6. Oviduct open into:
7. Early development of chick is similar to:
8. In human female uterine tube opens into:
9. During oogenesis, the total non-disjunction of chromosomes occur is:
10. Which one secretes liquid to protect and nourish sperm cells:
11. Ovoviviparity is shown by:
12. Reptiles and birds are:
13. Lutenizing harmone induces:
14. During delivery in human the average loss of blood is about:
15. Post fertilization development of endosperm:
16. The total gestation period in human female is about:
17. Between the seminiferous tubules are interstitial cells, which secrete:
18. Vehicle for transport of male gamete in land plants is:
19. The shell, over chick egg, is secreted as it passes through:
20. Union of gametes is called:
21. Labour pains are induced by:
22. Cause of syphilis is:
23. Fruit development without fertilization is .......?
24. External fertilization occurs in:
25. Discharge of egg from the ovary is called:
26. Sperms are formed in:
27. Causitive agent of Genital herpes is a:
28. Parthenocarpy is sometimes artificially induced in tomato, peppers etc. by adding.
29. Effect of Photoperiodism was first studied in 1920 by:
30. The end or complete stop of the menstrual cycle is called:
31. The animals that lay shelled eggs to protect the developing embryo from harsh terrestrial conditions are called:
32. Fertilization is the process which leads to the union of:
33. In human how many ova are usually discharged from the ovary at one time?
34. Fruit ripening is often accompanied by a burst of respiratory activity, called:
35. The condition in which biennial and perennial plants are stimulated to flower by expoux to low temperature is called:
36. Soyabean is an example of, plants:
37. In spermatophytes, important step in land adaptation is the evolution of:
38. In Honey bees male / drones are haploid and produce sperms by:
39. The inner soft wall of the human uterus is called:
40. The light which promotes germination of fern spores:
▶ Chapter 19 - Growth and Development
1. Growth rate is influenced by:
2. Neurula is the stage is which embryo has:
3. They mesodermal cells do not invaginate but migrate medially and caudally from both sides and create a midline thickening called:
4. The negative physiological changes in our body are called:
5. The living organisms producing their own food:
6. Parkinsons' disease onset usually at age of:
7. Young tissues retaining the potential to divide:
8. The light which favours the elongation of plant cells:
9. The growing tip of young stem moves in zig-zag fashion of the apex are:
10. Somites are formed and organized by:
11. In nature, P 730 to P 660 conversion occurs in the:
12. Meristem is:
13. Abscisic acid can be sprayed on tree crops to regulate:
14. The light that enhances cell division but retard cell enlargement:
15. Environmental factors causing abnormal development are:
16. Blastomere are formed during:
17. During gastrulation the blastoderm splits into two layers, an upper layer of cells is called:
18. The long day plants produce flowers in the presence of photo chrome:
19. Optimum temperature for growth of plants is:
20. Tobacco plant produces flowers in:
21. Human embryo remains enclosed in a sac called:
22. The removal of apex releases the lateral buds from the apical dominance. It is called:
23. A condition in which palatine processes of maxilla and palatine fall to fuse is:
24. Which is a long day plant?
25. During elongation the cell volume increases upto:
26. In which developmental stage, germs layers are formed:
27. Study of aging is called:
28. Grey equatorial cytoplasm gives rise to:
29. The condition in which an individual has small skull is termed as:
30. Immediately after fertilization, the egg undergoes a series of mitotic divisions called:
31. Primary growth in plants is caused by:
32. The spread of tumour cells and establishment of secondary areas of growth is called:
33. The discoidal cap of cells above the blastocoel is called:
34. A plant has a growth pattern called:
35. Clear cytoplasm produces:
▶ Chapter 20 - Chromosomes and DNA
1. mRNA is synthesized by:
2. Which of the following are nonsense codons?
3. Enzymes are responsible for assembly of:
4. In bacteria the newly synthesized mRNA is released in:
5. Most of chromosomes consist of DNA and protein:
6. The contrasting pairs of allele for all the seven characters chosen by Mendel showed:
7. Genetic code is combination of ………………… nucleotides.
8. Which is not stop signal?
9. X-ray diffraction pattern of DNA prepared:
10. Genes keep on hopping on different loci:
11. The genic system for determination of sex is present in:
12. The basic structure of nucleic acids was determined by:
13. DNA polymerase enzyme was isolated from:
14. The 5-carbon sugar in DNA is:
15. A gene starts with codon, which encodes the amino acid methionine.
16. Individual with Klinefelter's syndrome have sex chromosome as following:
17. Every 200 nucleotides, the DNA duplex is coiled around a core of eight histone proteins forming a complex known as:
18. In sickle cell anemia a point mutation leads to the change of amino acid Le. glutamic acid in to:
19. The microtubules are composed of a protein tubulin and traces of:
20. In eukaryotes, the number of nucleotides in okazaki fragments are about:
21. The number of chromosomes in mouse is:
22. Morphological characteristics of chromosomes are collectively called:
23. Repeating units of DNA are called:
24. Human cells contain types of tRNA molecules
25. Expression of a trait is termed as:
26. A full set of genes of an individual is called:
27. Nucleosome occurs every:
28. Transfer of genetic material from one cell to another, which alter the genetic make up of recipient cell is called:
29. X-ray diffraction analysis of DNA was performed by:
30. The two different pieces of DNA joined together, is called as:
31. Unlike most proteins, histones are………….
32. The sequence of nucleotides that determines the amino acid sequence of a protein in called:/p>
33. The strand which elongates towards the replication fork is:
34. Which of the following is a non sense codon?
35. The genetic code not related to others:
36. This condition appears as a result of point mutation:
37. A central role for chromosomes in heredity was first suggested in 1900 by:
38. DNA was discovered in:
39. Chromosomes appear inside the nucleus at the time of:/p>
40. Mendelian factors were renamed as genes by
41. Each Okazaki fragment is synthesized by:
42. Which of the following polymerase synthesize tRNA:
43. Highly condensed portions of the chromatin are called:
44. Strand of DNA which is not transcribed is called as:
45. Every gene starts with initiation codon AUG which normally encodes the amino acid.
▶ Chapter 21 - Cell Cycle
1. In klinefelter's syndrome:
2. Mitosis is divided into:
3. Separation of homologous chromosomes occurs during:
4. The proteins which become activated during cytokinesis are:
5. Cancer is mainly caused by mutation in:
6. Haploid males produce sperms by mitosis:
7. The centriole lie within the:
8. The stage that lasts for days, weaks or even years is:
9. Meiosis generally takes place in plants during formation of:
10. All are related to turner's syndrome, except:
11 Apoptosis is:
12. Synapsis occurs during:
13. Chromatin network is visible during:
14. Second meiotic division in oocytes, until fertilization proceeds as far as:
15. Contractile ring in cytokinesis is formed by:
16. During which stage chromosomes are doubled:
17. Mitotic apparatus is organized during.
18. Each diploid cell after meiosis produces:
19. Programmed and organized process of cell death is also called:
20. Type of cell division in which number of chromosomes is reduced to half in daughter cells is called:
21. Full cell cycle in yeast cells has length of:
22. Cytoplasm becomes more viscous during:
23. The microtubules are composed of a protein tubulin and traces of_______.
24. Tissue culture and cloning seek help through.
25. Mongolism is also known as:
26. Bivalents or Tetrads are formed:
27. Inter phase period can be divided into.
28. Which tumor is delocalized or has branches other than site of origin:
29. Cancer occurs due to error in:
30. The tumor which is localized and not transferred to other body parts:
▶ Chapter 22 - Variation and Genetics
1. When a single gene has multiple phenotypic effects, the phenomenon is called:
2. What happens when both alleles of a gene pair independently express in a heterozygote?
3. A heterozygote offspring quantitatively exceeds the phenotypic expression of both the homozygote parents due to:
4. How many gene pairs contribute to the wheat grain colour?
5. Who for the first time found white eye mutant in Drosophila?
6. Which of the following traits is transmitted directly from an affected father to only his sons?
7. Which phenomenon reduces the chances of genetic recombination and variations among offspring?
8. Which of the following traits is not sex - linked recessive?
9. Which of these traits zigzags from maternal grand father through a carrier daughter to a grandson?
10. When a haemophilic carrier woman marries a normal man, who among her offspring may be affected.
11. What is the risk of a colour-blind child in a family when mother is colour-blind but father is normal?
12. What is the risk of a colour-blind child in a family when father is colour-blind but mother is normal?
13. Two normal (Aa) parents have chance of albino child:
14. The universal donor blood group is:
15. Bodded gene in Drosophila is present on:
16. The autosomal non-disjunction in man in which 21st pair of chromosome fail to segregate, resulting in gamete with 24 chromosomes is called:
17. Secretors have dominant secretor gene "Se" on chromosome:
18. The gene causing the white eye trait in drosophila resides only on the:
19. Human skin colour is controlled by gene pairs:
20. Sex linkage in Drosophila was discovered by:
21. This cross finds out the homozygous or heterozygous nature of the genotype:
22. All the genes found in a breeding population constitute:
23. Genomic library is a collection of bacterial or bacteriophage:
24. la 1901, ABO group system was discovered by:
25. ABO blood group system in man is encoded by a polymorphic gene I on chromosome:
26. Study of aging is called:
27. Inheritance of acquired characteristics was proposed by:
28. ABO blood group system is encoded by a single polymorphic gene with:
29. Haemophilia C:
30. The position of a gene on the chromosome is called its
31. Chances of genetic recombination are minimized due to:
32. The form of appearance of the trait is called:
33. Bombay phenotype is an example of:
34. Rh blood group system is named after is:
35. Any group of inter breeding organisms of the same specie that exist together in both time and space is called:
36. Green color blindness is called:
37. The true colour blindness is:
38. Hypophosphatemic rickets is an X-linked:
39. A gene with multiple phenotypic effect is called:
40. Which of the following chromosomal abnormalities lead t tallness, aggressiveness, mental defect and anti social behaviour:
▶ Chapter 23 - Biotechnology
1. Cystic fibrosis patients lack a gene that codes for trans-membrane carrier of:
2. Which of these is a true statement?
3. Which of these is a benefit to having insulin produced by biotechnology?
4. Restriction fragment length polymorphism (RFLPs)
5. Which of these would you not expect to be a biotechnology product?
6. What is the benefit of using a retrovirus as a vector in gest therapy?
7. Gel electrophoresis:
8. Which of these is incorrectly matched?
9. The gene of interest could be placed on:
10. The gene therapy is used to repair a:
11. DNA polymerase is extracted from:
12. DNA finger prints can be prepared from:
13. Identify the day neutral plant:
14. Polyhydroxy butyrate is called:
15. Commonly used restriction enzyme is:
16. The blood serum containing antibodies is called:
17. PSe101has antibiotic resistance gene for:
18. Organisms produced by culturing single cells are:
19. A group of bacteria that can tolerate temperature up to 120°C:
20. The base pairs in human genome are:
21. It makes the bacterial cell more permeable to take up recombinant Plasmids.
22. Transfer of genetic material from one cell to other that can alter the genetic make up of recipient cell is called:
23. Growth of a tissue in an artificial liquid culture medium is termed as:
24. E.coli, is a commonly used:
25. Which of the enzymes act as molecular scissors.
26. The genome fragment can be separated according to their lengths during.
27. To search a genetic library for a certain gene scientists are:
28. The use of transgenic farm animals to produce pharmaceutical is termed as:
29. Antithrombin III is a biotechnological product produced in:
30. Urine is preferable vehicle for a biotechnology product than.
31. Arabidopsis is:
32. The first restriction enzyme was isolated by:
33. A collection of bacterial and phage viruses clones containing a particular segment of DNA from the source cell is called:
34. How many base pairs are found in the human genome?
35. Primer for PCR contains about:
36. The enzyme Luciferase is produced by an insect Commonly known as:
▶ Chapter 24 - Evolution
1. The gill pouches of mammals and birds' embryos are.
2. Darwin's theory, as presented in "The Origin of Species," mainly concerned.
3. The smallest biological unit that can evolve over time is:
4. A gene pool consists of:
5. In a population with two alleles for a particular locus, B and b, the allele frequency of B is 0.7. When would be the frequency of heterozygote if the population is in Hardy-Weinberg equilibrium?
6. In a population that is in Hardy-Weinberg equilibrium. 16% of the individuals show the recessive trait. What is the frequency of the dominant allele in the population?
7. Selection acts directly on:
8. The rudimentary structures that had important function in ancestors in the remote past are said to be:
9. Gill pouches in human develop into:
10. Endosymbiont hypothesis explains origin of:
11. The ultimate source of all evolutionary changes, which affect gene frequency, is:
12. An essay on the Principle of Population was published by:
13. Esasy on the principle of population was published by:
14. Armadillo, the armoured mammals live only in:
15. Which scientist believed in divine creation?
16. In natural selection, the environment plays role affecting the proportions of gene in:
17. In terrestrial vertebrates, the gill pouches develop in to:
18. Taq polymerase is obtained from:
19. Book "The origin of species" was written by:
20. A respiratory protein which is present in all aerobic species is:
21. In Pakistan among the animals declared extinct is:
22. Zoos and botanical gardens are to save species whose extinction is
23. Flagella may have arisen through the ingestion of prokaryotes similar to spiral shaped bacteria called:
24. Archarbacteria can tolerate high temperature upto:
25. Who published papers on inheritance?
26. Alfred Wallace developed a theory of natural selection essentially identical to:
27. Which of the following is vestigial organ of whale.
28. Endangered species of plants have been recorded to more than:
29. Drawin "Origin of species" was published in:
30. How many types of finches did Darwin collect on Galapagos Island:
31. Which respiratory protein is found in all aerobic species?
▶ Chapter 25 - Ecosystem
1. The study of the relationships of organisms to their environment is known as:
2. Similar group of individuals who can inter breed and produce organisms of their own kind forms a:
3. When living and non-living interact to produce a stable system in which exchange of materials with flow of energy takes place, it forms a/an.
4. The living organisms which can prepare their own food are
5. The living organisms, which cannot prepare their own food but obtain ready-made food from others, are
6. Dermatocarpon is an example of:
7. A species in imminent danger of extinction throughout its range is called:
8. It is thin layer of earth in which all living organism exists:
9. The percentage of freshwater in lakes, streams and rivers is:
10. The macronutrient, in biogeochemical cycles, is:
11. Crustacean with a spiny projection on these planktonic creatures help to keep them from sinking:
12. A change in the community structure of an ecosystem over a period of time is:
13. Over grazing may lead to:
14. The relationship between insect and flowering plants is the example of:
15. Loss of nitrates from the soil takes place by:
16. The earth surface is covered with water about:
17. At the time of independence, the population of Pakistan was about:
18. Biome is a:
19. In 1917, term niche was first proposed by American Ornithologist named:
20. Moderate grazing is very helpful to maintain ecosystem:
21. Symbiotic association of an alga living within fungus mycelium is known as:
22. About this much of the total energy from sun is trapped by the producers in an ecosystem:
23. The productivity can be indicated by:
24. One of the following is an example of predator-prey relationship:
25. In each case succession is initiated by a few hardy invaders called:
26. Study of single population's relationship to environment is called:
27. When bacteria in soil oxidize ammonia or ammonium ions is called:
28. All the food chains begin with:
29. The abiotic component of an ecosystem is:
30. Phytoplanktons are drifting.
31. In xerosere, polytrichum and tortula represent.
32. Study of relationship of different communities to environment is called:
33. Mountains of Kara-Koram and Hindukush are the regions, also called as:
34. The animal that is caught and eaten is called:
35. If population of predator increases then population of prey.
36. Lichen is a symbiotic association between a fungus and:
37. An association between organisms of different species in which one partner gets benefit and other is harmed:
38. Symbiotic relationship between insects and flowering plants is the example of:
▶ Chapter 26 - Some Major Ecosystem
1. The soil or terrestrial ecosystem have some adaptations for animals and plants.
2. Most plants fit only into a few ecosystem which type of planta seem to fit into ecosystem of grass land.
3. In which type of ecosystem is the smallest fraction of nutrients present in into soil?
4. What biome has the richest soil with nutrients and can be converted into agriculture?
5. Which of the biomes has been increased in area by human activities?
6. The deepest zone of freshwater lakes is known as:
7. Cacti and Euphorbia are desert plants which store water in their:
8. Nutrients tend to be concentrated near the bottom sediments:
9. In Pakistan, the desert ecosystem of Western Punjab is:
10. It is not fossilized fuel:
11. In Sindh, the desert ecosystem is called:
12. Layering is a characteristic of:
13. The upper layer of earth crust is:
14. Conferous forest located at high altitude are:
15. Who defined the niche as the species occupation?
16. Northern coniferous forests are also called:
17. Coniferous forests located at high latitude are called:
18. Temperate deciduous forests are located in Pakistan at
19. A little light is left to power photosynthesis at the depth of:
20. Which of the following is the most fragile ecosystem?
21. In temperate grassland the rate of primary production is about:
22. In aquatic ecosystem, near shore zone is called:
23. A treasure of all types of resources essential to maintain life on earth is:
24. Deserts generally occur in region where annual rainfall is less than:
25. The scientific name for rhesus monkey is:
26. The arctic tundra stretches across Northern North America, Northern Europe and:
27. The producers in limnetic zone are:
28. Desert ecosystem of Mainwali and Bhakkar is called:
▶ Chapter 27 - Man and His Environment
1. Which of the country/continent has the highest rate of human population?
2. If the population is above the carrying capacity what must happen.
3. What is our principal source of energy.
4. Batteries store which type of energy.
5. What substance destroys ozone layer?
6. The air pollutant oxides of nitrogen result from:
7. An unusual type of pollution is:
8. Stone monuments like "Taj Mahal" are eroded due to "Stone cancer" by:
9. A chemical that kills weed in a crop is called:
10. In dams, the power used to drive generators to produce electricity is called:
11. Diseases in living organisms caused by parasites are called:
12. Air in motion is called:
13. Acetabularia is an/a
14. As CFCs rise to the atmosphere, the ultraviolet rays release:
15. Study of human populations and the things that affect them, is called:
16. Diseases in living organisms caused by parasites are called as:
17. Stone cancer is result of:
18. The steady internal state of homeostasis is known as:
19. Which of the following is a renewable resource.
20. Which one of the following pair is a renewable resource.
21. Which of the following act as environmental buffer?
22. Some detergents contain a lot of:
23. The destruction of forests leave the soil barren and this is called:
24. Ozone Molecule is made up by binding of three atoms of:
25. Population of Pakistan in the year 1947 was.
26. Fresh water ecosystem covers less than.
27. The total area of the world under cultivation is:
28. Water present in form of frozen ice caps is:
29. The increase of environmental temperature due to high amount of CO, is known as:
30. The colour of the pure form of ozone (0,) is:
31. Treasure of all type of resources is:
32. The nuclear power station can last only for about.
33. About 95% of our daily energy requirement are filled by:
