Biology today

• after their maturation, spermatozoa detach from Sertoli cells. The process is called spermiation. The released sperms are s ...

·It is also called backbone or spine. It is curved, vertical rod, about 70 cm long, in the mid-dorsal line of the neck and trunk ...

female reproductive system • The female reproductive system consists of a pair of ovaries, a pair of Fallopian tubes (oviduct ...

dormant follicle is called the primordial follicle. It remains like this (the primary oocyte is arrested at the diplotene of the ...

fallopian tube • The function of the Fallopian tube is to convey the ovum from the ovary to the uterus. It is done by perista ...

during intercourse, and forms part of the birth canal during labour. • The opening of the vagina is called the vaginal orific ...

Gametogenesis in females • The process of development and maturation of ovum is known as oogenesis. • It consists of three ...

• ca2+ rise initiated by fertilising sperm results in degradation of regulatory unit of mPF through Anaphase Promoting Comple ...

through proliferation of their granulosa cells, addition of thecal covering on the outside. • The FSh stimulates ovarian foll ...

to respond or may be resistant to FSh. In this case FSh levels are very high and the estrogen level very low. It occurs between ...

how many days does it take for spermatogenesis to take place? (a) 40 to 65 days (b) 60 to 75 days (c) 70 to 95 days (d) 50 to 6 ...

The sequence of nitrogenous bases in one strand of DNA are 3′ TAC GCG ACG 5′. The complementary DNA strand should have (a) 5 ′ ...

6262 MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 (a) A - (i), B - (ii), C - (iii), D - (iv) (b) A - (i), B - (iii), C - ...

MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 6363 II. Flora contains the account of habitat and distribution of plants i ...

6464 MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 (b) B - Scala vestibuli-filled with endolymph that ends at the oval wi ...

MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 6565 Find the wrongly matched pair. (a) Endemism - Species confined to one ...

6666 MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 Match the following and select the correct option. Column - I Column ...

MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 6767 Match the hormones secreted by various endocrine structures and choos ...

6868 MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 (b) preventing the process of translation of mRNA (c) preventing the p ...

MTMTBIOLOGY TODAYBIOLOGY TODAY || MARCH ‘16MARCH ‘16 6969 The restriction endonucleases are used in genetic engineering, becau ...