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Biology (AIPMT)

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Which type of biodiversity tends to be the highest near the equator?

  1. Genetic biodiversity

  2. Terrestrial biodiversity

  3. Species biodiversity

  4. Ecosystem biodiversity

  5. Community biodiversity


Correct Option: B
Explanation:

It results in high primary productivity and warm climate.

Choose the phenomenon in which an organism escapes by resembling others.

  1. Adaptation

  2. Homology

  3. Analogy

  4. Mimicry

  5. Darwinism


Correct Option: D
Explanation:

It is a means of adaptation and protection against predation.

Which of the following is the study that compares and analyses the characteristics of different people and the relationships between them?

  1. Eugenics

  2. Ethnology

  3. Euthenics

  4. Euphenics

  5. Eunomics


Correct Option: B
Explanation:

Study and comparison of characteristics of different people and the relationship between them.

The study of terrestrial animals in other arthropod groups is known as

  1. pedology

  2. geology

  3. pathology

  4. hydrology

  5. entomology


Correct Option: E
Explanation:

It includes the study of insects.

In RNA, thymine is replaced by which one of the following base pairs?

  1. Adenine

  2. Guanine

  3. Uracil

  4. Thymine

  5. DNA


Correct Option: C
Explanation:

In RNA, thymine is replaced by uracil because it takes less energy for synthesis and easily gets used up when RNA deteriorates.

In 1961, the two French microbiologists Francois Jacob and Jacques Monod at Pasteur Institute, Paris proposed a mechanism called

  1. One gene-one enzyme hypothesis

  2. Operon hypothesis

  3. Central dogma reverse

  4. Genomics

  5. Semiconservative hypothesis


Correct Option: B
Explanation:

It regulates the gene action. It was given by Francois Jacob and Jacques Monod in 1961.

Sansevieria is an example of

  1. cuttings

  2. layering

  3. air layering

  4. mound layering

  5. grafting


Correct Option: A
Explanation:

It is a small piece of plant organ.

The branch of zoology concerned with the study of amphibians is

  1. herpetology

  2. saurology

  3. ornithology

  4. palaeontology

  5. mammalogy


Correct Option: A
Explanation:

The study of amphibians including frogs, toads, salamanders, etc.

What is the life span of Sequoia (Redwood tree)?

  1. 3000 - 4000 years

  2. 2000 - 3000 years

  3. 500 years

  4. 11,300 years

  5. 200 years


Correct Option: A
Explanation:

Life span of sequoia is 3000 - 4000 years.

The type of fertilisation that occur in frogs is known as

  1. exogamy

  2. endogamy

  3. anisogamy

  4. isogamy

  5. polygamy


Correct Option: A
Explanation:

Cross-fertilisation involves two fusing gametes which are derived from different parents.

When both stock and scion are cut obliquely at about the same angle, it is called

  1. crown grafting

  2. whip grafting

  3. wedge grafting

  4. side grafting

  5. bud grafting


Correct Option: B
Explanation:

In whip grafting, both stock and scion are cut obliquely at about the same angle.

The phenomenon in which an orchid resembles to a female insect to pollinate itself is known as

  1. mimicry

  2. parthenogenesis

  3. self pollination

  4. cross pollination

  5. pseudocopulation


Correct Option: E
Explanation:

It describes behaviour similar to copulation that serves as a reproductive function for one or both participants, but does not involve actual sexual union between the participants.

Saprolegnia is an example of

  1. sporangiospores

  2. chlamydospores

  3. zoospores

  4. oidia

  5. conidia


Correct Option: C
Explanation:

They are motile and flagellated spores.

Which of the following is known as four o'clock plant?

  1. Ginkgo bilbo

  2. Dalbergia sissoo

  3. Pinus longifolia

  4. Mirabilis jalapa

  5. Bellis perennis


Correct Option: D
Explanation:

It is a genus of plantin of the family Nyctaginaceae. It is  a common garden plant, Mirabilis jalapa, of the four o' clock family, having tubular red, white, yellow, or variegated flowers that open late in the afternoon.

In which of the following phenomenon a flower creates some mechanical barrier on their stigmatic surface to avoid self pollination?

  1. Dichogamy

  2. Self incompatibility

  3. Herkogamy

  4. Dioecism

  5. Heterostyly


Correct Option: C
Explanation:

This flower possesses some mechanical barrier on their stigmatic surface to avoid self pollination, presence of gynostegium and pollinia in caleotropis.

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