Match the months listed in Column - I write the organogenesis of foetus in Column - II. Column - I Column - II (i) First month (a) Separation of eye lids (ii) Second month (b) Hairs on head (iii) Fifth month (c) Heart (iv) Six month (d) limbs and Digits

( i ) - ( c ) , ( ii ) - ( d ) , ( iii ) - ( b ) , ( iv ) - ( a )

( i ) - ( c ) , ( ii ) - ( d ) , ( iii ) - ( a ) , ( iv ) - ( b )

( i ) - ( b ) , ( ii ) - ( c ) , ( iii ) - ( d ) , ( iv ) - ( a )

( i ) - ( d ) , ( ii ) - ( b ) , ( iii ) - ( c ) , ( iv ) - ( a )

Match the following columns and select the correct option:- Column-I Column-II (a) Ovary (i) Human chorionic gonadotropin (b) Placenta (ii) Estrogen & Progesterone (c) Corpus luteum (iii) Androgens (d) Leydig cells (iv) Progesterone only

( a ) - ( ii ) , ( b ) - ( i ) , ( c ) - ( iv ) , ( d ) - ( iii )

( a ) - ( iv ) , ( b ) - ( iii ) , ( c ) - ( ii ) , ( d ) - ( i )

( a ) - ( i ) , ( b ) - ( ii ) , ( c ) - ( iii ) , ( d ) - ( iv )

( a ) - ( i ) , ( b ) - ( iii ) , ( c ) - ( ii ) , ( d ) - ( iv )

Fertilisation results in the formation of zygote which begins to develop into an embryo. The zygote divides repeatedly to give rise to a ball of cells. The cells then begin to form groups that develop into different tissues and organs of the body. This developing structure is termed an embryo. The embryo gets embedded in the wall of the uterus for further development.

Match the following: Column A Column B Sperm Cat Internal fertilization Frog External fertilization Female Cervix Male

Sperms are haploid gametes that are present in sexually reproducing males. Cats are mammals, and in all mammals, fertilization takes place within the body. Therefore, internal fertilization takes place in cats. Female frogs release their eggs out of the body into the water, which fuses with sperms released by male frogs into the water. Therefore, external fertilization takes place in frogs. Cervix is a part of the female reproductive system. It is a cylinder-shaped neck of tissue that connects the vagina with the uterus. It facilitates the entry of sperms into the uterine cavity, and if sperm fuse with an ovum, the zygote forms. Column A Column B Sperm Male Internal fertilization Cats External fertilization Frog Cervix Female

Amnion, in reptiles, birds, and mammals, a membrane forming a fluid-filled cavity i.e. amniotic sac that encloses the embryo. The amnion of mammalian embryo is derived from ectoderm on the inner side and covered with mesoderm (both are germ layers), it acts as a protective sac along with three other extraembryonic membranes: the chorion, the yolk sac, and the allantois. The amnion contains a thin, transparent fluid in which the embryo is suspended. It provides a cushion against mechanical injury providing a protective environment for the developing embryo.

EASY

Earn 100

The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregnancy?

50% studentsanswered this correctly

Important Questions on Reproduction in Animals

EASY

Science>Biology>Reproduction in Animals>Development of Embryo

Hormones secreted by the placenta to maintain pregnancy are

EASY

Science>Biology>Reproduction in Animals>Development of Embryo

Placenta also acts as an endocrine tissue and produces several hormones choose the correct option for it.

MEDIUM

Science>Biology>Reproduction in Animals>Development of Embryo

Foetus develop its limbs and digits in _________ during embryonic development.

EASY

Science>Biology>Reproduction in Animals>Development of Embryo

The amnion of mammalian embryo is derived from

MEDIUM

Science>Biology>Reproduction in Animals>Development of Embryo

Match the months listed in Column - I write the organogenesis of foetus in Column - II.

	Column - I		Column - II
(i)	First month	(a)	Separation of eye lids
(ii)	Second month	(b)	Hairs on head
(iii)	Fifth month	(c)	Heart
(iv)	Six month	(d)	limbs and Digits

EASY

Science>Biology>Reproduction in Animals>Development of Embryo

The embryo with 8 to 16 blastomeres is called a:

HARD

Science>Biology>Reproduction in Animals>Development of Embryo

The major features of embryonic development at various months of pregnancy are given below. Choose the correct option for correct sequential events.
I) The first movements of the foetus
II) The foetus develops limbs and digits
III) The embryo's heart is formed
IV) The body is covered with fine hair

EASY

Science>Biology>Reproduction in Animals>Development of Embryo

Select the correct option describing gonadotropin activity in a normal pregnant female:

EASY

Science>Biology>Reproduction in Animals>Development of Embryo

Which of the following secretes the hormone, relaxin, during the later phase of pregnancy?

MEDIUM

Science>Biology>Reproduction in Animals>Development of Embryo

Match the following columns and select the correct option:-

Column-I		Column-II
(a)	Ovary	(i)	Human chorionic gonadotropin
(b)	Placenta	(ii)	Estrogen & Progesterone
(c)	Corpus luteum	(iii)	Androgens
(d)	Leydig cells	(iv)	Progesterone only