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Zoology - 2 (B.Sc. Agriculture)

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According to the amount of yolk, birds are:

  1. Alecithal

  2. Mesolecithal

  3. Megalecithal

  4. None of the above


Correct Option: C
Explanation:

 Birds are megalecithal.

The life history of insects usually exhibit ____.

  1. osmosis

  2. metamorphosis

  3. mitosis

  4. prosthesis


Correct Option: B
Explanation:

The life history of insects usually exhibit metamorphosis.

Confirmatory test for typhoid is

  1. ELISA

  2. Western blot

  3. Widal Test

  4. ESR test


Correct Option: C
Explanation:

Widal test is a confirmatory test for typhoid.

An animal with achitinous exoskeleton, haemocoel and gills belongs to

  1. aschelminthes

  2. arthropoda

  3. echinodermata

  4. urochordata


Correct Option: B

Thyroxin is synthesized from

  1. iodine

  2. vitamin A

  3. vitamin B

  4. vitamin C


Correct Option: A
Explanation:

 Thyroxin is synthesized from iodine.Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. It is the inactive form and most of it is converted to an active form called triiodothyronine by organs such as the liver and kidneys.

Typhoid, cholera are caused by ______.

  1. mosquitoes

  2. air-borne spread

  3. contaminated food and water

  4. silk moths


Correct Option: C
Explanation:

Typhoid and cholera are caused by contaminated food and water.

Which of the following insects spreads Kala -azar?

  1. Sand fly

  2. Fruit fly

  3. Mosquito

  4. None of these


Correct Option: A
Explanation:

Sand fly  spreads Kala -azar.

What is the average life span of RBCs in man?

  1. 5 days

  2. 14 days

  3. 50 days

  4. 120 days


Correct Option: D
Explanation:

The average life span of RBCs in man 120 days.

The rearing of silkworms is called ___________.

  1. sericulture

  2. apiculture

  3. pisciculture

  4. floriculture


Correct Option: A

A cockroach has

  1. three pairs of walking legs

  2. two pairs of walking legs

  3. four pairs of walking legs

  4. one pair of walking legs


Correct Option: A
Explanation:

Three pairs of legs are attached to thorax region of a cockroach.

During which stage of mitosis do chromosomes move towards the pole of the mitotic spindle?

  1. Metaphase

  2. Telophase

  3. Anaphase

  4. Prophase


Correct Option: C
Explanation:

During anaphase, sister chromatids separate from each other and move towards the poles.

Cryogenics is the is the study of the production and behaviour of materials

  1. at very high temperatures

  2. in hair-styling

  3. at very low temperatures

  4. in caves and tunnels


Correct Option: C

The receptors found in the muscles, tendons and joints are

  1. teloreceptors

  2. proprioreceptors

  3. interorereceptors

  4. thermoreceptors


Correct Option: B
Explanation:

The receptors found in the muscles, tendons and joints are propriorecpetors. These are stretch recpetors. They supply information about the so called kinesthetic sense of equilibrium and orientation. They act like pressure gauges and are responsible for maintenance of body posture. 

The anticoagulant in the saliva of leeches, which prevents coagulation of blood, is called

  1. Enterokinase

  2. Ptyalin

  3. Hirudin

  4. Secretin


Correct Option: C

The term systematics was coined by

  1. John Ray

  2. Bentham and Hooker

  3. Lamarck

  4. Linnaeus


Correct Option: D
Explanation:

 The term systematics was coined by Linnaeus.

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