The given diagram shows different parts of human eye with one part labeled as X. Which the following statement is correct regarding label X?

In dicots, the most common pollen tetrad is:

Which of the following plants yields oil and fibre both?

Which of the following statement (s) is/are correct? (i) According to the WHO, reproductive health is total well-being in the physical, social, emotional, behavioural aspects of reproduction. (ii) According to the WHO, reproductive health is total well-being in the physical, social and emotional aspects of reproduction. (iii) A reproductively healthy society has people with physically and functionally normal reproductive organs. (iv) Reproductively healthy societies have abnormal sex-related emotional and behavioural interactions.

Yeast cell divides by

Dyne/cm2 is not a unit of                                                 [RPET 2000]

In order to obtain virus-free plants through tissue culture, the best method is:

Which of the following ion is necessary-for the contraction of a muscle and nerve impulse transmission?

Universal donor blood group is:

Aleurone cells are present in endosperm of: