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In humans, at the end of the first meiotic division, the male germ cells differentiate into the:
Snow-blindness in Antarctic region is due to
The second maturation division of the mammalian ovum occurs:
When $X \rightarrow ^{14}_{7}\text{N} + 2\beta^-$, then the number of neutrons in $X$ will be:
Vasa efferentia are the ductules leading from:
Match the following columns and select the correct option. Column I (a) T4 (b) PTH (c) GnRH (d) LH Column II (i) Hypothalamus (ii) Thyroid (iii) Pituitary (iv) Parathyroid
About which day in a normal human menstrual cycle does rapid secretion of LH (popularly called LH-surge) normally occur?
The testes in humans are situated outside the abdominal cavity inside a pouch called scrotum. The purpose served is:
If M(A, Z), M_p, and M_n denote the masses of the nucleus $_{Z}^{A}X$, proton, and neutron respectively in units of u (1 u = 931.5 MeV/c^2) and BE represents its binding energy in MeV. Then:
For the following logic gate, the truth table is:
In the given figure, the potential difference between $A$ and $B$ is:
Arrange the following male sex accessory ducts in the correct sequence for the transport of sperms from the testis: (a) Vas deferens (b) Urethral meatus (c) Vasa efferentia (d) Rete testis (e) Epididymis
Which of the following events is not associated with ovulation in human females?
Several hormones like hCG, hPL, oestrogen, progesterone are produced by:
A football player is moving southward and suddenly turns eastward with the same speed to avoid an opponent. The force that acts on the player while turning is
The binding energy per nucleon of deuterium and helium atom is 1.1 MeV and 7.0 MeV. If two deuterium nuclei fuse to form a helium atom, the energy released is:
What is the change in oxidation number of carbon in the following reaction? $\text{CH}_4(g) + 4\text{Cl}_2(g) \rightarrow \text{CCl}_4(l) + 4\text{HCl}(g)$
Which of the following statements are true for spermatogenesis but do not hold true for Oogenesis?
A sample of radioactive element has a mass of 10 gm at an instant $t = 0$. The approximate mass of this element in the sample after two mean lives is:
If the radius of ${}^{27}_{13}\mathrm{Al}$ nucleus is taken to be $R_{\mathrm{Al}}$, then the radius of ${}^{125}_{53}\mathrm{Te}$ nucleus is near: