Match the items given in Column I with those in Column II and select the correct option given below :
| column (i) | Column (ii) |
| (a) Proliferative Phase | (i) Breakdown of endometrial lining |
| (b) Secretory Phase | (ii) Follicular Phase |
| (c) Menstruation | (iii) Luteal Phase |
| a | b | c |
| iii | ii | i |
| a | b | c |
| i | iii | ii |
| a | b | c |
| iii | i | ii |
| a | b | c |
| ii | iii | i |
D.
| a | b | c |
| ii | iii | i |
In the proliferative phase, the follicles start developing, hence, called the follicular phase.
Secretory phase is also called as luteal phase mainly controlled by progesterone secreted by corpus luteum. Estrogen further thickens the endometrium maintained by progesterone.
Menstruation occurs due to decline in progesterone level and involves the breakdown of the overgrown endometrial lining.
Withdrawal of which of the following hormones is the immediate cause of menstruation?
Eastrogens
FSH
FSH-RH
FSH-RH
Gastrula is the embryonic stage in which
Cleavage occurs
blastocoel forms
Germinal layers form
Villi form
Hormones secreted by the placenta to maintain pregnancy are
hCG, hPL, progestogens, prolactin
hCG, hPL, estrogens, relaxin, oxytocin
hCG, progestogens, estrogens, glucocorticoids
hCG, hPL, progestogens, estrogens
The stage during which separation of the paired homologous chromosomes begins is
Pachytene
Diplotene
Zygotene
Diakinesis
Which of the following statements is correct?
Ovules are not enclosed by ovary wall in gymnosperms
Selaginella is heterosporous, while Salvinia is homosporous
Stems are usually unbranched in both Cycas and Cedrus
Horsetails are gymnosperms
The difference between spermiogenesis and spermiation is
In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules, while in spermiation spermatozoa are formed.
