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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1301. |
Genetic Drift |
| Answer» The elimination of the genes of certain traits when a section of a population migrates or dies of natural calamity. It alters the gene frequency of the remaining population. | |
| 1302. |
What is antibiotic resistance ? |
| Answer» Ability of organisms to keep multiplying even when exposed to antibiotic agents (substance destructive to life ) | |
| 1303. |
Explain the statement "natural selection really means differential reproduction " |
| Answer» Some members of a population have traits (genes ) which enable than to grow up and reproduce at a higher rate and leave more surviving offspring in the next generation than others. | |
| 1304. |
Mule is a hybrid, which of the following statements is correct?A. Mule is not a speciesB. Mule is a new speciesC. Horse and ass are two populationsD. Mule represents a common ancestor of horse and ass |
| Answer» Correct Answer - C | |
| 1305. |
A species is a collection of demes. The deme is a group ofA. genesB. individualsC. chromosomesD. population with a common gene pool |
| Answer» Correct Answer - D | |
| 1306. |
What is a deme ? |
| Answer» Small groups of large population are called demes. Members of a deme usually mate among themselves as they are closer together. | |
| 1307. |
Assertion : Formation of new species is called speciation. Reason : The deme has a common gene pool.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are ture but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - B The phenomenon of development of a new species from pre-existing one is called speciation. A species is a collection of demes. The deme is a groups of populations with a common gene pool. |
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| 1308. |
Assertion : Homo habilis was the first tool maker. Reason : He was cave-dweller.A. If both the assertion and the reason are true and the reason is a correct explanation of the assertionB. If both the assertion and reason are ture but the reason is not a correct explanation of the assertionC. If the assertion is true but the reason is falseD. If both the assertion and reason are false |
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Answer» Correct Answer - B Homo habilis was the first tool maker and used tools of chipped stones extensively. It is also called handy man because heaps of tools found with these fossils included sharpened stones which indicates that homo habilis was capable of "making tools". He also led community life in caves and greatly cared for the young ones. |
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| 1309. |
What does the following equation represent? Explain. p2 + 2pq + q2 = 1 |
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Answer» The equation represents Hardy-Weinberg’s Principle which states that allele frequencies in a population are stable and is constant from generation to generation. 1 represents stable allelic frequency indicating no evolution occurring. p represents frequency of homozygous dominant (AA), 2 pq represents frequency of heterozygous (Aa) and q represents frequency of homozygous recessive (aa). |
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| 1310. |
According to the Darwinian theory, the rate of appearance of new forms is linked to their life cycles. Explain. |
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Answer» Microbes have a very short life cycle and divide fast. They can produce millions of organisms within few hours. Thus, it is easy to see variant population in less span of time. On the other hand, higher organisms have a long time span and the variations are not visible fast. |
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| 1311. |
Neo-Darwinian Theory tells us that beneficial genetic mutations concentrated in a population over time can result in the formation of new ___________. |
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Answer» Neo-Darwinian Theory tells us that beneficial genetic mutations concentrated in a population over time can result in the formation of new Species. |
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| 1312. |
Animal husbandry and plant breeding programmers are the examples ofA. reverse evolutionB. artifical selectionC. Mutation and natural selection.D. natural selectron. |
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Answer» Correct Answer - B Animal husbandry and plant breeding programmes are the exmples of artificil selection. The artifical selection is the modification of species by selective breeding. Animals or plants with desirable characterstics are interbred with the aim of altering the genotype and producing a new strain of the organism for a specific purpose. Traditional breeding techniques have been supplemented by more recent methods of genetic engineering. genetic testing and embryo methods of genetic engineering, genetic testing and embryo manipulation. Sequencing of genomes of commercially important animals and plant species has enabled the inheritance of desired genes to be monitored directly by molecular methods. |
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| 1313. |
Animal husbandry and plant breeding programmes are the examples of:a. reverse evolutionb. artificial selectionc. mutationd. natural selection |
| Answer» b. artificial selection | |
| 1314. |
The theory of spontaneous generation stated that:a. life arose from living forms onlyb. life can arise from both living and non-livingc. life can arise from non-living things only.d. life arises spontaneously, neither from living nor from the non-living. |
| Answer» c. life can arise from non-living things only. | |
| 1315. |
The proponent of the theory of spontaneous generation wasA. Louis PasteurB. Von HelmontC. SpailanzaniD. Franclsco Redi |
| Answer» Correct Answer - B | |
| 1316. |
The book "The Origin of life" was written by a Russian scientist,A. DarwinB. OparinC. Hugo de VriesD. Lamarck |
| Answer» Correct Answer - B | |
| 1317. |
The English scientist who worked on the origin of life and settled in India?A. A.I. OparinB. J.B.S. HaldaneC. Louis PasteurD. Van Helmont |
| Answer» Correct Answer - B | |
| 1318. |
Which of the following differences between Lamarckism and Darwinism is incorrect?A. `{:("Lamarckism","Darwinism"),("It does not consider","Struggle for existence is very important in this theory"):}`B. `{:("Lamarckism","Darwinism"),("Only useful variations are transferred to the next generation.","All the acquired characters are inherited to the inherited to the next generation"):}`C. `{:("Lamarckism","Darwinism"),("Neglects survival of fittest","Based on survival of the fittest"):}`D. `{:("Lamarckism","Darwinism"),("None of these",):}` |
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Answer» Correct Answer - B According to Lamarckism, all the acquired characters are inherited to the next generation. According to Darwinism. Only useful variations are transferred to the next generation. |
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| 1319. |
Which cannot be explained by Lamarckism ?A. Loss of tail by humansB. Elongation by neck in GiraffeC. Weak progeny of a Nobel laureateD. None of the above |
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Answer» Correct Answer - C Weak progeny of a Noble laureate cannot be explained by Lamarckism. |
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| 1320. |
Lamarckism cannot explainA. webbed toes in aquatic birdsB. weak muscles in the son of a wrestlerC. long narrow and limbless body of snakesD. heterophylly |
| Answer» Correct Answer - B | |
| 1321. |
Which cannot be explained by Lamarckism ?A. Elongated of neck of giraffe.B. Loss of tail in human being.C. Weak progeny of nobel laureate.D. None of these |
| Answer» Correct Answer - D | |
| 1322. |
Which one of the following is the most primitive ancestor of man?A. RamapithecusB. AustralopithecusC. Homo habilisD. Homo neanderthalensis |
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Answer» Correct Answer - A Ramapithecus is the most primitive ancestor of man. |
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| 1323. |
Which is not correct matchA. Alanine, Glycine, Aspartic acid-MillerB. Coacervate-OparinC. Microsphere-sydney FoxD. Stromatolites-Aristotle |
| Answer» Correct Answer - D | |
| 1324. |
Average cranial capacity of Neanderthal man was:A. 1400 ccB. 900 ccC. 1450 ccD. 650-800 cc |
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Answer» Correct Answer - A Cranial capacity of Neanderthal Man was 1400 cc. |
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| 1325. |
Who proposed symbiotic origin of EukaryotesA. Graham Cairns-SmithB. MargulisC. Abbe LemaireD. Kant |
| Answer» Correct Answer - B | |
| 1326. |
The following are some major events in the early history of life. P. First heterotrophic prokaryotes Q. First genes R. First eukaryotes S. First autotrophic prokaryotes T. First animals Which option below places these events in the correct order?A. `PrarrQrarrSrarrRrarrT`B. `QrarrSrarrPrarrTrarrR`C. `QrarrPrarrSrarrRrarrrT`D. `QrarrSrarrPrarrRrarrT` |
| Answer» Correct Answer - C | |
| 1327. |
Theory of panspermia was proposed to explain theA. Origin of universeB. Origin of LifeC. Origin of earthD. Evolution of life |
| Answer» Correct Answer - B | |
| 1328. |
The first organisms appeared on earth wereA. ChemoheterotrophsB. ChemoautotrophsC. PhotoautotrophsD. Decomposers |
| Answer» Correct Answer - A | |
| 1329. |
Simple one-celled cyanobacteria like organisms appeared on earthA. 5600 million years agoB. 5000 million years agoC. 4600 million years agoD. 3.3 to 3.5 billion years ago |
| Answer» Correct Answer - D | |
| 1330. |
One of the following appeared on the earth with the coming of the plants and was absent in the pastA. Carbon oxideB. MethaneC. AmmoniaD. Oxygen |
| Answer» Correct Answer - D | |
| 1331. |
Select the correct statement from the followingA. Darwinian variations are small and directionlessB. Fitness is the end result of the ability to adapt and gets selected by natureC. All mammals except whales and camels have seven cervical vertebraeD. Mutations are random and directional |
| Answer» Correct Answer - B | |
| 1332. |
A specific rat population was controlled for about a decade by a poison. After apopulation decline for about 10 years, the rat population was increased stabilized.Resistance to poison is governed by a dominant autosomal gene ‘R’. In 1975 majority of the resistant animals are heterozygous at this locus (Rr).(a) What was the major genotype of the rat population before 1961 ?(A) RR, (B) Rr, (C) rr, (D) R is absent as it is produced by a mutation.(b) What explanation you give for the development of resistance against poison in these rats? (c) This illustration can be utilized to explain a theory of Evolution” Substantiate. |
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Answer» (a) R is absent as it is produced by mutation (b) Mutation leads to genetic variation and which in turn lead to evolution (c) Evolution by anthropogenic action |
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| 1333. |
First cell produced on earth isA. ProtobiontB. ProtozoaC. MetazoaD. None of these |
| Answer» Correct Answer - A | |
| 1334. |
Theory of chemical evolution is a version of theory of abiogenesis. Analyze the statement. |
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Answer» Oparin and Haldane proposed that the first form of life that arose from preexisting nonliving organic molecules (e.g. RNA, protein, etc.) and it is followed by chemical evolution |
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| 1335. |
Assertion:Life originated by chance coming together of necessary chemicals through a series of chemical reactions (abiogenesis). Reason:Abiogenesis has not been experimentally provedA. If both Assertion and Reason are true and Reason is the correct explanation of AssertionB. If both Assertion and Reason are true and Reason is not the correct explanation of AssertionC. If Assertion is true but Reason is false.D. If both Assertion and Reason are false |
| Answer» Correct Answer - C | |
| 1336. |
Abiogenesis meansA. Origin of life from non-living organismsB. Origin of life from living organismsC. Origin of virsuses and microbesD. None of these |
| Answer» Correct Answer - A | |
| 1337. |
What causes speciation according to Hugo-de-Vries ? |
| Answer» Hugo De Vries in 1901 proposed that new species arise from the preexisting ones in a single generation by sudden appearance of marked variations called mutations | |
| 1338. |
Define ontogenetic law |
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Answer» Ontogeny recapitulates phytogeny. |
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| 1339. |
Describe the theory of abiogenesis. |
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Answer» According to this theory, the first form of life arose slowly through evolutionary forces from non living molecules.
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| 1340. |
Name the group of animals that evolved into amphibian. |
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Answer» Lobe-fins evolved into amphibian |
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| 1341. |
As per Hugo deVries, what is the cause of speciation |
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Answer» Mutation. (Single step large mutation) |
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| 1342. |
According to Darwin, mechanism of evolution is |
| Answer» Correct Answer - natural selection | |
| 1343. |
Mention the key concepts about the mechanism of biological evolution/ speciation according to(a) Devries(b) Darwin |
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Answer» (a) De Vries – Mutation (b) Darwin – Natural selection and branching decent. |
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| 1344. |
Biological evolution is the cumulative changes that occur in a ________ over time. |
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Answer» Biological evolution is the cumulative changes that occur in a Population over time. |
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| 1345. |
Who demonstrated existence of life in the boiled broth flask ?A. DarwinB. PasteurC. Francisco RediD. None of these |
| Answer» Correct Answer - B | |
| 1346. |
The origin of mammal like reptiles occurred inA. triassic periodB. permian periodC. jurassic periodD. tertiary period |
| Answer» Correct Answer - B | |
| 1347. |
Explain convergent evolution with the help of two examples. |
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Answer» Different structures evolved similarly due to same functions. This is called convergent evolution. Examples: i. Wings of butterfly and birds. ii. Sweet potato (root modification) and potato (stem modification). |
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| 1348. |
Identity the examples of convergent evolution from the following: i. Flippers of penguins and dolphins ii. Eyes of octopus and mammals iii. Vertebrate brains |
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Answer» i. Flippers of penguins and dolphins ii. Eyes of octopus and mammals |
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| 1349. |
Identify the examples of homologous structures from the following: i. Vertebrate hearts ii. Thorns in Bougainvillea and tendrils of Cucurbita. iii. Food storage organs in sweet potato and potato. |
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Answer» i. Vertebrate hearts ii. Thorns in Bougainvillea and tendrils of Cucurbita. |
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| 1350. |
What do you mean by biogenesis? |
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Answer» Biogenesis states that life originates from pre-existing life. |
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