InterviewSolution
Saved Bookmarks
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.
| 251. |
A scientist who gave a theory very similar to that given by Darwin was Or Co-worker of Darwin wasA. WallaceB. MendelC. BatesonD. Lamarck |
| Answer» Correct Answer - A | |
| 252. |
Who gave principle that man tends to multiply by geometrical progression then food supply?A. MalthusB. DarwinC. HaldonD. Gandhi |
| Answer» Correct Answer - A | |
| 253. |
Given : 1 = Natural selection , 2 = Variations and their inheritance , 3 = Survival of the fittest , 4 = struggle for existence According the Darwinism, which of the following represents the correct squence of events in the origin of new species ?A. 1,2,3,4B. 2,3,1,4C. 3,4,1,2,D. 4,2,3,1 |
| Answer» Correct Answer - D | |
| 254. |
Assertion : All primates have a common ancestry. Reason : The most primate was shrew like animals.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 |
|
Answer» Correct Answer - B All perimates have a common ancestry (monophytic origin). Primitive evolution began 80-100 million year ago. The evolutionary history of eutherian mammals dates back to early cretaceous period. The earliest eutherians were shrew-like terrestrial insectivores. they were small, ground dwelling mammals. |
|
| 255. |
Struggle for existence and survival of fittest are related to `:`A. LamarckismB. MendelismC. DarwinismD. Neo Lamarckism |
|
Answer» Correct Answer - C "Struggle for existence and survival of the fittest" is associated with Darwinism. |
|
| 256. |
Assertion:The natural interspecific hybrids are lacking or are very rate . Reason:Members of different species have some sort of reproductive isolation and generally do not interbreedA. 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 - A | |
| 257. |
Which one of the following theories was proposed by Weismann?(a) Law of inheritance(b) Theory of inheritance of acquired characters(c) Theory of natural selection(d) Theory of germplasm |
|
Answer» (d) Theory of germplasm |
|
| 258. |
Assertion : The theory of survival of the fittest is widely misunderstood. Reason : Evolution does not always increase the chances of a species survival and species do not survive when mich chances happen rapidly.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 |
|
Answer» Correct Answer - A A species composed of only a few organisms has limited genetic variation and mating possibilities. Should conditions for survival change and should some of these organisms die due to their lack of characterstics that could accommodate that change the species would become smaller over time and could eventually die out. |
|
| 259. |
Coacervates are(a) protobionts having polysaccharide, protein, and H2O (b) protein aggregate(c) protein and lipid aggregates(d) None of the above |
|
Answer» (a) protobionts having polysaccharide, protein, and H2O |
|
| 260. |
Synthesis of amino acids to prove that amino acids were formed in primitive ocean was experimentally proved(a) Oparin(b) Haldane(c) Sydney fox(d) Stanley Miller |
|
Answer» (d) Stanley Miller |
|
| 261. |
Assertion:Basis of adaptation is the preexisting gene mutation Reason:In changed environment , a hidden gene mutation may express and result in survival of the organisms and finally lead to adaptation to new conditionsA. 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 - A | |
| 262. |
The idea that the life originates from preexisting life is referred as(a) bio genesis theory(b) special creation theory(c) abiogenesis theory(d) extraterrestrial theory |
|
Answer» (a) biogenesis theory |
|
| 263. |
Assertion: The earth originally had a reducing atmosphere. Reason : There was no life on the earth when it came into existanceA. 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 - B | |
| 264. |
Assertion : New life comes only from the preexisting life Reason:Spontaneous generation of life under the present environmental conditions on earth is not possibleA. 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 - A | |
| 265. |
Hugo de Vries studied mutations inA. EucalyptusB. Evening primroseC. HibiscusD. Vallisneria |
| Answer» Correct Answer - B | |
| 266. |
Differentiate between gene frequency and gene pool. |
|
Answer» Gene frequency is the percentage of an allele is relation to the total number of all the alleles of a gene present in an inbreeding population; while the sum total of all the genes and their alleles in an inbreeding population is called as Gene pool. |
|
| 267. |
If the frequency of one allele is 'p' and for another, it is 'q' for one gene, what will be the formula to calculate allele frequency in future generations according to Hardy-Weinberggeneticequilibrium? |
|
Answer» The formula to calculate allele frequency is (p+q)2 = p2 + 2pq + q2 = 1 |
|
| 268. |
The frequency of an allele in an isolated population may change due toA. Genetic driftB. Gene flowC. MutationD. Natural selection. |
| Answer» Correct Answer - A | |
| 269. |
How does a population become founders of a new species. |
|
Answer» When a few members or a small group of members from a certain population invades a new geographical region they may have a different type of or changed allele frequencies from that of the original drifted population, they become the founders of new species and the effect is called as the founder's effect. |
|
| 270. |
If the frequency of one allele is ‘p’ and for another, it is ‘q’ for one gene, what will be the formula to calculate allele frequency in future generations according to Hardy– Weinberg genetic equilibrium? |
|
Answer» (p + q)2 = p2 + 2pq + q2 = 1 |
|
| 271. |
Describe Founder effect. |
|
Answer» Genetic drift: Changes occurring in frequencies by chance is called genetic drift. Sometimes, due to changes in allele frequency in new population, some form a different species. This effect is called founder effect and the original drifted population is called founder. |
|
| 272. |
What is founder effect? |
|
Answer» Sometimes the change in allele frequency is so different in the new sample of population that they become a different species. The original drifted population becomes founder and the effect is called founder effect. |
|
| 273. |
When does a species become founders to cause founder effect? |
|
Answer» When the change in the alleles frequency is so different in the new sample of population that they become a different species, the original drifted population becomes founder. |
|
| 274. |
Define founder effect. |
|
Answer» Founder effect is a genetic bottle neck that results when a small group of individuals from a larger source population establish a new population far from the original population. |
|
| 275. |
How does Darwin’s theory of Natural Selection explain the appearance of new forms of life on earth? |
|
Answer» Darwinian theory of evolution ▪ Charles Darwin, based on his observations during a sea voyage around the world in the ship H.M.S. Beagle, concluded the following: • Varying degrees of similarities can be observed between existing life forms and those that existed millions of years ago. • There has been gradual evolution of life forms with new forms arising at different periods of history. • Any population has built-in variations in characteristics which adapt it better to environment. • The characteristics which enable some populations or individuals to survive better in natural conditions (climate, food, physical factors) would out-breed others (Survival of the fittest). • Those populations which are better fit (reproductively fit) in an environment will be selected by nature and will survive more (Natural selection). • Adaptability is inherited and fitness is the end result of ability to adapt and get selected by nature. |
|
| 276. |
What is gene flow? |
|
Answer» Gene flow is nothing but exchanging alleles between populations. Gene flow can introduce new alleles into a population, providing new genetic variation on which evolution can work. Gene flow makes the genetic composition of populations more similar. |
|
| 277. |
Discuss Darwin's theory of Natural Selection. |
|
Answer» Natural selection is the effect of advantageous allele. In natural selection (NS) , individuals that possess certain forms of an inherited phenotypic trait tend to survive better and produce more offspring than do individuals that possess other forms of trait. NS is the only evolutionary mechanism that consistently favors alleles that improve the reproductive success of the organism in its environment. |
|
| 278. |
Deviation of homologous are caused byA. Time consequence alongB. Gradual changes in structureC. Drastic changes in structureD. No changes in structure |
| Answer» Correct Answer - B | |
| 279. |
All the following are examples of homologous organs, exceptA. Arm of man and flipper of whaleB. Thorn of Bougaivillaea and tendril of CucurbitaC. Eye of an octopus and eye of a mammalD. Brain of frog and man |
| Answer» Correct Answer - C | |
| 280. |
Anatomically and structually different, but function similar structures are calledA. AnalogousB. DivergentC. HomologousD. Convergent |
| Answer» Correct Answer - A | |
| 281. |
The term for similarity in organ structure seen in great diversity is Or The similarity of bone structure in the forelimbs of many vertebrates is an example onA. HomologyB. Convergent evolutionC. AnalogyD. Adaptive radiation |
| Answer» Correct Answer - A | |
| 282. |
Amphibians were dominant during ____ period.A. CarboniferousB. SilurianC. OrdovicianD. Cambrian |
|
Answer» Correct Answer - A Refer to asnwer 95. |
|
| 283. |
The homologous organs areA. Wings of pigeon and houseflyB. Wings of housefly and batC. Wings of pigeon and forelimbs of manD. Wings of butterfly, bat and houselly |
| Answer» Correct Answer - C | |
| 284. |
Which of the following is veatigeal organ in humansA. Muscles of ear pinnaB. Nictitating membraneC. Mammary glands in malesD. All of the above |
| Answer» Correct Answer - D | |
| 285. |
Which is a vestigeal organ of pythonA. NoseB. Hind limbsC. ScalesD. Teeth |
| Answer» Correct Answer - B | |
| 286. |
The wings of an insect and a bat exhibitA. HomologyB. AnalogyC. AtavismD. Connecting link |
| Answer» Correct Answer - B | |
| 287. |
Homologous organs areA. Wings of insects and BatB. Gills of Fish and lungs of RabbitC. Pectoral fins of Fish and fore limbs of HorseD. Wings of Grasshopper and Crow |
|
Answer» Correct Answer - C Pectoral fins of fish and fore limbs of horse are homologous organs. |
|
| 288. |
Which one of the following groups are not analogous organsA. Wings of birds and wings of butterflyB. Eye of Octopus and eye of mammalsC. Flippers of penguins and flippers of DolphinD. Thorns of Bougainvillea and tendrils of Cucurbita - |
|
Answer» Correct Answer - D Thorns of Bougainvillea and tendril of Cucurbita are not analogous organs. |
|
| 289. |
Amphibians were dominant duringA. CarboniferousB. SilurianC. OrdovicianD. Cambrian |
| Answer» Correct Answer - A | |
| 290. |
Which one of the following sets includes all homologous organsA. Hind legs of pig, duck and kangarooB. Wings of bats, butterfly and birdC. Sting of huney bee, scorpion and snakeD. Tail of rat, peacock and cockroach |
| Answer» Correct Answer - A | |
| 291. |
Which of the following are homologous organs?A. Wings of bird and wings of a batB. Nails of human being and claws in cat.C. Wings of bird and wings of insect.D. Wings of bat and wings of cockroach |
| Answer» Correct Answer - B | |
| 292. |
Which of the following are homologous organsA. Wings of bird and wings of insectB. Wings of bat and wings of cockroachC. Wings of bird and hands of humanD. Nails of human being and claws in animals |
| Answer» Correct Answer - C | |
| 293. |
Homologous organs explainA. Convergent evolutionB. Divergent evolutionC. PedogenesisD. Prodagility |
| Answer» Correct Answer - B | |
| 294. |
Resemblance between widely different groups due to a common adaptation isA. Parallel evolutionB. Divergent evolutionC. Convergent evolutionD. Retrogressive evolution |
|
Answer» Correct Answer - C Resemblance between widely different groups due to a common adaptation is convergent evolution. |
|
| 295. |
The factors involved in the formation of new species areA. isolation and competitionB. gene flow and competitionC. competition and mutationD. isolation and vriation. |
|
Answer» Correct Answer - D Isolation is the prevention of mating amongst interbreeding groups due to physical (e.g. geopgraphical, ecological) and biotic (e.g., physiological, behavioural, mechanical, genetic ) barriers. Reproductive isolating mechanisms are the biological properi9tes of individuals which prevent the interbreeding of naturally sympatric populations. It maintains the characters of the species but can lead to the origin of new species. Also, Darwin considered that useful variations are transmitted to the offspring and appear more prominently in succeeding generations. After some generations these become continous and gradual varaiations in the possessor would be so distinct that they form a new species. |
|
| 296. |
Which one of the following groups are not analogous organsA. Wings of birds and wings of butterflyB. Eye of octopus and eye of mammalsC. Flipers of penguin and flippers of dolphinD. Thoms of bougainvilla tendril of Cucurbita |
| Answer» Correct Answer - D | |
| 297. |
Homologous organs areA. Wings of Pigeon and ButterflyB. Wings of Pigeon and HouseflyC. Wings of Pigeon and arms of HumansD. Wings of Bat, Housefly and Butterfly |
|
Answer» Correct Answer - C Homologous organs are wings of pigeon and arms of humans. |
|
| 298. |
Which of the following is most important for speciation?A. Seasonal isolationB. Reproductive isolationC. Behavioural isolationD. Tropical isolation. |
| Answer» Correct Answer - B | |
| 299. |
Single step large mutation leading to speciation is also calledA. Founder effectB. SaltationC. Branching descentD. Natural selection |
| Answer» Correct Answer - B | |
| 300. |
Which of the following is most important for speciation?A. Seasonal isolationB. Reproductive isolationC. Behavioural isolationD. Tropical isolation |
|
Answer» Correct Answer - B Reproductive isolation is the prevention of interbereeding between the populations of a species present in the different enviroments, it maintains the characters of the species but also leads to origin of new species (speciation). |
|