Home
Current Affairs January 2024

What is the correct answer?

4

In order to become structurally and functionally a spermatozoan, each spermatid has to undergo a process of differentiation called

A. spermiation

B. spermiogenesis

C. spermatogenesis

D. androgenesis

Correct Answer :

B. spermiogenesis


Related Questions

What is the correct answer?

4

If an unfertilized frog's egg is pricked with a micro-needle, it will

A. die immediately

B. start dividing

C. will remain undivided

D. transform into a tadpole at a faster rate

What is the correct answer?

4

Human beings are

A. monoecious

B. dioecius

C. intersexual

D. hermaphrodites

What is the correct answer?

4

Embryo sac in a hen's egg is formed by

A. ectoderm

B. meso derm

C. somatic mesoderm and endoderm

D. splanchnic mesoderm and ectoderm

What is the correct answer?

4

Sexual reproduction in larval condition is known as

A. paedogamy

B. autogamy

C. isogamy

D. anisogamy

What is the correct answer?

4

The sperm produces substances of enzymatic nature of sperm lysin. In mammals, it is called

A. hyaluronidase

B. hyaluronic acid

C. androgamone

D. cryanogamone

What is the correct answer?

4

Which of the following develops from ectoderm ?

A. Spinal cord and brain

B. Liver and heart

C. Eye and skin

D. Notochord and vertebral colum.

What is the correct answer?

4

The sexual embrage of the male and female frogs is called

A. copulation

B. amphimixis

C. syngamy

D. amplexus

What is the correct answer?

4

In frog's egg the divisoin is

A. holoblastic

B. meroblastic

C. diploblastic

D. triploblastic

What is the correct answer?

4

During normal development the activation of the egg is achieved by

A. vitellogenesis

B. oogenesis

C. spermatogenesis

D. fertilization

What is the correct answer?

4

Meroblastic cleavage is found in

A. man

B. hen's egg

C. frog

D. rabbit

What is the correct answer?

4

The formation, development and matura- j tion of the female gamete is called

A. ovulation

B. oogenesis

C. vitellogenesis

D. folliculogenesis

What is the correct answer?

4

Development of egg without fertilization is termed as

A. parthenogenesis

B. parthenocarpy

C. polyembryony

D. paedogenesis

What is the correct answer?

4

How many cleavages are completed in 16 cell stages of frog's egg ?

A. 3

B. 8

C. 4

D. 12

What is the correct answer?

4

The allantoic vesicle arises from

A. foregut

B. midgut

C. hindgut

D. somatopleure

What is the correct answer?

4

Grey cresent is present in

A. zygote of frog

B. brain of rabbit

C. eye of frog

D. retina of cockroach

What is the correct answer?

4

Antifertilizin is secreted by

A. fertilized egg

B. spermatozoa

C. unfertilized egg

D. egg membranes

What is the correct answer?

4

In forg, the sperms released from the testis take the following route to reach the ureter:

A. Vasa efferentia, Bidder's canal, uriniferous tubule and nephrotome

B. Vasa efferentia, Bidder's canal, and uriniferous tubule

C. Vasa efferentia, uriniferous tubule nd Bidder's canal.

D. Vasa deferentia, uriniferous tubule and Bidder's canal

What is the correct answer?

4

The intestine of tadpole is

A. straight

B. curved

C. coiled

D. zig-zag

What is the correct answer?

4

Spermatoliosis is a process by which

A. the spermatids differentiate into spermatozoa

B. primary spermatcyte is tarnsformed into a secondary spermatocyte

C. spermatogonea complete multiplication phase

D. secondary spermatocyte extrudes polar bodies

What is the correct answer?

4

Oogonia entering the growth phase of oogenesis is called

A. primary oocyte

B. secodnary oocyte

C. ootid

D. gonocyte

What is the correct answer?

4

Blastopore in frogs development occurs in

A. blastula and opens in blastocoel

B. blastula and opens in archenteron

C. gastrula and opens in blastocoel

D. gastrula and opens in archenteron

What is the correct answer?

4

Mammalian placenta is

A. a cord between mother and foetus

B. place of attachment in uterus wall where exchange of material between mother and foetus takes place

C. outer covering of foetus

D. allantoic part of the uterus

What is the correct answer?

4

During cleavage, the embryo

A. enlarges in size

B. decreases in size

C. retains the same size at the beginning

D. gradually enlarges in size

What is the correct answer?

4

In frog, gastrulation is completed by

A. epiboly

B. emboly

C. both and

D. delamination

What is the correct answer?

4

During the development of frog, the ar-chenteron is formed in

A. early blastula

B. late blastula

C. early gastrula

D. lategastrula

What is the correct answer?

4

The substance fertilizin is secreted by

A. ova

B. sperm

C. both and

D. primary spermatogonia

What is the correct answer?

4

The nervous system, epidermis and hairs and nails are derivatives of

A. endoderm

B. mesoderm

C. ectoderm

D. chordomesoderm

What is the correct answer?

4

Which of the following do not show parental care over their young ones ?

A. mammals

B. lizards

C. fowls

D. earwigs

What is the correct answer?

4

The process of synthesis of yolk by the oocyte is termed

A. folliculogenesis

B. oogenesis

C. vitellogenesis

D. spermiogenesis

What is the correct answer?

4

In the human female, the primary oocytes remain small without any growth for

A. 4-5 years

B. 6-8 years

C. 8 - 10 years

D. 12 -14 years