Acetyl Co-A reacts with ________ to begin Krebs cycle.

Which one of the following traits shows criss-cross inheritance?

Given below is diagram of T. S of testis. Select the option which gives correct identification of function of cells labeled A, B, C and D from the options given below.

A - cells undergo spermatogenesis to produce spermatozoa.
B - cell responsible for development of male secondary sexual characters.
C - heads of sperms remain attached to these cells.
D - haploid male gamete.

Animal having flame cells as excretory structure is _____.

Which one of the following is the genetic material of bacteriophage \(\phi X 174\) ?

Given below are two statements.
Statement I: Macula densa and JG cells together form the JG apparatus.
Statement II: The JG apparatus plays an important role in reabsorption of glucose within kidney.
In the light of above two statements, choose the correct answer from options given below.

Atrial systole lasts for __________ in cardiac cycle.

Simple microscope is used to see the object first in blue light and then a red light. Due to the change from blue to red light, its magnifying power

If \(\mathrm{f}(x)=\frac{3 x+4}{5 x-7}\) and \(\mathrm{g}(x)=\frac{7 x+4}{5 x-3}\), then \(\mathrm{f}(\mathrm{g}(x))=\)

Let \(\mathrm{a}, \mathrm{b}, \mathrm{c}\) be distinct non-negative umbers. If the vectors \(a \hat{i}+a \hat{j}+c \hat{k}, \hat{i}+\hat{k}\) and \(c \hat{i}+c \hat{j}+b \hat{k}\) lie in a plane, then c is

The value of current I in the given circuit is

Select the correct statement/s regarding blood groups in human.
i. Some genetically determined blood group systems are ABO, Rh, Duffy, Lewis, Bombay blood group etc.
ii. Three types of agglutinogens are present on surface of human RBCs such as A, B and D.
iii. Individuals with blood group "AB Rh +ve" have A, B and D antigens on the surface of their RBCs and both antibodies 'a' and 'b' in their plasma.
iv. Haemolytic disease of Newborn occurs when mother with Rh-ve blood group conceives Rh -ve foetus.
v. Individuals with 'AB' blood group are called universal donors while those with 'O' blood group are called universal acceptors, with reference to blood transfusion.

At absolute zero temperature, pure silicon behaves as