InterviewSolution
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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.
| 551. |
In which era the fossils are scanty |
| Answer» Correct Answer - Proterozoic | |
| 552. |
Life cannot originate from inorganic materials at present because ofA. High degree of environmental pollutionB. Very high atmospheric temperatureC. A very high amount of oxygen in the atmosphereD. Absence of raw materials |
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Answer» A very high amount of oxygen in atmosphere. This is because oxygen is a strong oxidising gas which oxidises the inorganic materials in our atmosphere and thus prevents chemical origin of life. |
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| 553. |
Sickle-cell anaemia, the best example of natural selection, is due to gene modification related to amino acid ofA. First `beta` chainB. Second `beta` chainC. First `alpha` chainD. Second `alpha` chain |
| Answer» Correct Answer - B | |
| 554. |
Name the first organism that invaded land. |
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Answer» First organism is Plants. |
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| 555. |
Name the ancestor of bryophytes. |
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Answer» Chlorophyta. |
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| 556. |
What is the source of variation in monoparental (asexual) reproduction ? |
| Answer» The chromosomal aberrations and gene mutations are the only source of genetic variation in monoparental reproduction | |
| 557. |
In case of evolution which of the following statements is not correctA. Fossilized animals provided important information to trace evolutionB. Wing of birds and forelimbs of cows are homologousC. In higher animals early development stages are similarD. Variation among individuals are not important in natural selection |
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Answer» Correct Answer - A Since variations, which help the organisms in adaptations, are selected by nature and form the basis of evolution. |
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| 558. |
Fossils of Australopithecus were first found inA. AmericaB. AustraliaC. S.AfricaD. E.Africa |
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Answer» Correct Answer - C Australopithecus fossils were discovered in 1920 by prof. Raymond from taunqs in south Africa. |
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| 559. |
The theory of spontaneous generation was proposed by :A. SpallanzaniB. Von HelmontC. F.RediD. Louis Pasteur |
| Answer» Correct Answer - B | |
| 560. |
The theory of spontaneous generation was proposed by :A. SpallanzaniB. Von HelmontC. F.RediD. Louis Pasteur |
| Answer» Correct Answer - B | |
| 561. |
An evolutionary trend in which there is general degeneration and loss of organs isA. ProgressiveB. VesligealC. RestrogressiveD. Stasigenesis |
| Answer» Correct Answer - C | |
| 562. |
The first life on earth originated from nonliving materials has been explained byA. Theory of biogenesisB. Theory of abiogenesisC. Theory of special creationD. Theory of extra-terrestrial origin |
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Answer» Correct Answer - B The first on earth originated from nonliving materials has been explained by theory of abiogenesis. |
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| 563. |
Origin of life from nonliving matter is known asA. CoacervatesB. AbiogenesisC. BiogenesisD. None of these |
| Answer» Correct Answer - B | |
| 564. |
How do the movements of living and nonliving objects differ ? |
| Answer» Movements of living objects are spontaneous , i.e., are caused by a force arising within them . Movements of nonliving objects are induced by outside force, e.g., force of gravity makes water flow toward lower side. | |
| 565. |
Define Stabilizing selection. |
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Answer» If both the smallest and largest individuals contribute relatively fewer offspring to the next generation than those closer to average size do, then stabilizing selection is operating. It reduces the variation but does not change mean value. |
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| 566. |
What is Directional selection. |
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Answer» If individuals at one extreme of the size distribution e.g. (the larger ones) contribute more offspring to the next generation then the other individuals do, then the mean size of individuals in the population will increase. In this case directional population is operating. If directional selection operates for many generations, an evolutionary trend within the population results. |
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| 567. |
Define the term Disruptive selection. |
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Answer» When natural selection simultaneously favours individuals at both extremes of the distribution, disruptive selection is operating. As a result we can see two peaks in the distribution of a trait. |
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| 568. |
Give two examples of biogeographical evidence in favour of evolution. |
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Answer» i. Darwin’s finches ii. Australian marsupials |
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| 569. |
How can you say the lobefin fish were the ancestors of amphibian? |
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Answer» Lobefins fish have stout and strong fins, so they can move on land and swim in water to maintain a dual lives like amphibians. |
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| 570. |
Define genetic drift. |
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Answer» Random changes in the allelic frequencies of a population, occurring only by chance events, constitute genetic drift. |
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| 571. |
Give reason :A frog is an amphibian. |
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Answer» 1. Animals which are able to live in water and also on land are called amphibiAnswer: 2. Therefore a frog is considered an amphibian. |
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| 572. |
Study of animal fossils are |
| Answer» Correct Answer - Paleozoology | |
| 573. |
Remains of hard parts of life form found in rocks are |
| Answer» Correct Answer - Fossils | |
| 574. |
A biogeographical evidence in favour of organic evolution is provided by a. Archaeopteryx b. Modern horse c. Darwin’s finches d. Python |
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Answer» Darwin’s finches. |
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| 575. |
What causes speciation according to Hugo de Vries? |
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Answer» Hugo de Vries Mutation. |
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| 576. |
Arrange the following in a hierarchical manner in ascending order based on the period of their evolution.Homoerectus, Ramapithecus, Australopithecus, Homo sapiens. |
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Answer» Ramapithecus —> Australopithecus— >Homoerectus —> Homo sapiens |
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| 577. |
The organism which appeared first on earth is known asA. EubiontB. ProbiontC. EobiontD. True biont |
| Answer» Correct Answer - C | |
| 578. |
Theory of ablogenesis or spontaneous generation was finally disapproved byA. Louis PasteurB. A.I. OparinC. A.R. WallaceD. Sydney Fox |
| Answer» Correct Answer - A | |
| 579. |
Early atmosphere contained methane and other hydrocarbons. They have been now replaced byA. NitrogenB. OxygenC. CarbondioxideD. Hydrogen |
| Answer» Correct Answer - C | |
| 580. |
Most important condition for origin of life is the presence isA. WaterB. OxygenC. NitrogenD. Carbon |
| Answer» Correct Answer - A | |
| 581. |
Eukaryotes developed aroundA. 1,600 million years agoB. 459 million years agoC. 3,800 million years agoD. 4,200 million years ago |
| Answer» Correct Answer - A | |
| 582. |
Which one of the following is incorrect about the characteristics of proptobionts (coacervates and microsopheres) as envisaged in the abiogenic origin of life?A. They were partially isolated from the surroundings.B. They could maintain an internal enviorment.C. They were able to reproduce sexually.D. They could separate combinations of molecuels from the surroundings. |
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Answer» Correct Answer - C Coacervates and microspheres reproduced by asexual methods such as budding, fission and fragmentation. |
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| 583. |
Among following, the most recent isA. Homo sapiensB. AustralopithecinesC. Homo habilisD. Dryopithecus |
| Answer» Correct Answer - A | |
| 584. |
Average cranial capacity of Neanderthal man was:A. 390-510 ccB. 675 - 719 ccC. 1015 - 1075 ccD. 882-897 cc |
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Answer» Correct Answer - A Cranial capacity of Australopithecus was 390-510 cc. |
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| 585. |
The Neanderthal man had a cranial capacity of aroundA. 1600ccB. 650-800ccC. 900ccD. 1400cc |
| Answer» Correct Answer - D | |
| 586. |
The cranial capacity of Neanderthal man was betweenA. 1100-1500 ccB. 1200-1400 ccC. 1300-1600 ccD. 1000-1300 cc |
| Answer» Correct Answer - A | |
| 587. |
The sequence of origin of life may beA. Inorganic materials `rarr` Organic materials `rarr` Colloidal aggregate `rarr` Eobiont `rarr` CellB. Organic materials `rarr` Inorganic materials `rarr` Colloidal aggregate `rarr` Eobiont `rarr` CellC. Inorganic materials `rarr` Organic materials `rarr` Eobiont `rarr` Cell `rarr` Colloidal aggregateD. Organic materials `rarr` Inorganic materials `rarr` Eobiont `rarr` Cell `rarr` Colloidal aggregate. |
| Answer» Correct Answer - A | |
| 588. |
First life form on earth was aA. cynaobacteriumB. chemoherotrophC. autotrophD. photoautotroph. |
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Answer» Correct Answer - B It is presumed that the first living organisms were chemoheterotrophs that obtained energy by the fermentation of complex organic substances available to them from the sea broth. They were anaerobes. |
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| 589. |
Which of the following fossil men was expert in making tools, weapons and paintings ?A. Cro-Magnon ManB. Peking ManC. Java ManD. Neanderthal Man |
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Answer» Correct Answer - A Fossil man expert in making cave paintings and tools was Cro-Magnon Man. |
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| 590. |
Which of the following corresponds to mutagensA. Chemicals and radiations which cause changes in the genetic material of a cellB. Various archaebacteria that produce methaneC. Chemicals which react with ozone molecules and destroy themD. RNA molecules that infect plant and cause diseases |
| Answer» Correct Answer - A | |
| 591. |
What are Reptiles? |
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Answer» Animals which crawl are called Reptiles. For example: Snake |
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| 592. |
Sickle-cell anaemia is caused due to the substitution of :A. Valine by glutamic acid at sixth position of alpha chain of heamoglobinB. Valine by glutamic acid at sicth position of beta chain of haemoglobinC. glutamic acid by valine at sixth position of alpha chain of haemoglobinD. glutamic acid by valine at sixth position of deta chain of haemoglobin |
| Answer» Correct Answer - D | |
| 593. |
When does an original species become extinct? |
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Answer» During evolution, a new species with characteristics different from the original may be created. Sometimes the original species becomes extinct. |
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| 594. |
Fill in the blanks :1. Animals which crawl are called ………………..2. A mammals baby is …………………. on the mother’s milk for some time after birth. 3. The platypus and anteater are also considered as …………… 4. ………………… are somewhat like humans in appearance. 5. Apes mostly lived on …………. |
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Answer» 1. Reptiles 2. fed 3. mammals 4. Apes 5. trees |
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| 595. |
Which one of these was a flying dinosaurA. TriceratopsB. TyrannosaurusC. StegosaurusD. Pteranodon |
| Answer» Correct Answer - D | |
| 596. |
Which species are the most evolved animals among vertebrates? |
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Answer» Mammals are the most evolved animals among vertebrates. |
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| 597. |
What are Aquatic animals? |
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Answer» Living organisms that live only in water are called ‘Aquatic animals’. For example Fish |
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| 598. |
Analogous organs have aA. common embryonic origin but perform different functionsB. different embryonic origin and perform different functionsC. common embryonic origin and perform similar functionsD. different embryonic origin but perform similar functions |
| Answer» Correct Answer - D | |
| 599. |
What is the first human species called? |
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Answer» The first human species is called the ‘primitive man’. |
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| 600. |
Cro-Magnon Man isA. Homo sapiens fossilsB. Homo sapiensC. Homo habilisD. Homo erectus |
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Answer» Correct Answer - A Cro-Magnon man is Homo precambrian. |
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