Competitive Exams: Zoology MCQs (Practice-Test 41 of 112)

  1. The epididymis in viviparous mammals mainly helps in the

    1. transport of sperms only

    2. maturation of sperms only

    3. storage and transport of sperms

    4. maturation and storage of sperms

  2. In frog, eye lens develops

    1. ectoderm

    2. mesoderm

    3. endoderm

    4. mesenchyme

  3. Which one of the following is the characteristic of ascidlan?

    1. Elongated tail

    2. Large notochord

    3. Enlarged pharynx

    4. Well-developed statocyst

  4. Consider the following processes:

    1. Involution

    2. Epibody

    3. Invagination

    Which of the above accomplish the gastrulation in frog?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  5. The formation and the directionality of the primitive streak is under the control of

    1. blastocoel

    2. hypoblast

    3. somite

    4. primitive pit

  6. The primary organizer in amphibian embryo is

    1. ventral lip of blastopore

    2. anterior lip of blastopore

    3. dorsal lip of blastopore

    4. posterior lip of blastopore

  7. The pattern of implantation of the blastocyst in guinea pig, ape and man is

    1. superficial

    2. interstitial

    3. central

    4. eccentric

  8. Which one of the following types of egg is produced by Eutherian mammals?

    1. Mesolecithal

    2. Microlecithal

    3. Centrolecithal

    4. Telolecithal

  9. The most primitive type of placenta in mammals is known as

    1. Epithelia-chorial

    2. Haemo-chorial

    3. Endothelio-chorial

    4. Haemo-endothelial

  10. With reference to the development of allantois in mammals, consider the following statements

    1. It is composed of endoderm and splanchnic mesoderm.

    2. As it grows, mesodermal components of allantoic wall give rise to the blood vessel system of the allantois and fuse with mesoderm of chorion.

    3. Allantois of mammals supplies oxygen and nutrients to the embryo.

    Which of the statements given above are correct?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  11. Consider the following statements:

    1. Haemophilia is determined by sexlinked recessive gene.

    2. Haemophilia is known only in mates; and females homozygous for this gene are unknown.

    Which of the statements given above is/are correct?

    1. 1 only

    2. 2 only

    3. Both 1 and 2

    4. Neither 1 nor 2

    ZOOLOGY

  12. Who of the following proposed the theory that all organs of an individual produce minute particles carrying information about the organs?

    1. Wallace

    2. Darwin

    3. Lamarck

    4. Huxley

  13. Neo-Lamarckism is getting a new life with the discovery of:

    1. RNA interference

    2. Epistasis

    3. Genetic imprinting

    4. Paedomorphosis

  14. Consider the following:

    1. Alanine

    2. Glycine

    3. Aspartic acid

    Which of the above amino acids were produced in Miller's experiment to produce organic molecules from the gaseous composition of early/primitive atmosphere of earth?

    1. 1 and 2 only

    2. 2 and 3 only

    3. 1 and 3 only

    4. 1, 2 and 3

  15. Golden langur (Prbwtis gee,) is naturally found in which one of Wildlife Sanctuaries/National Parks?

    1. Periyar

    2. Sanska

    3. Manas

    4. Sasan Gir