List of top Biology Questions

Identify the elements whose deficiency causes both necrosis and chlorosis.

Receptor sites for neurotransmitters are present on

If there are 999 bases in an RNA that codes for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered?

Which of the following represents order of 'Horse'?

Plants which produce characterstic pneumatophores and show vivipary belong to

Select the mismatch :

Zygotic meiosis is characteristic of

Which of the following RNAs should be most abundant in animal cell?

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?

A temporary endocrine gland in the human body is

Which of the following is correctly matched for the product produced by them?

Viroids differ from viruses in having :

A decrease in blood pressure / volume will not cause the release of :

A baby boy aged two years is admitted to play school and passes through a dental check - up. The dentist observed that the boy had twenty teeth. Which teeth were absent?

Which cells of "Crypts of Lieberkuhn" secrete antibacterial lysozyme ?

Myelin sheath is produced by

Coconut fruit is a :

Functional megaspore in an angiosperm develops into ?

Attractants and rewards are required for

Adult human RBCs are enucleated. Which of the following statement(s) is/are most appropriate explanation for this feature ? (a) They do not need to reproduce (b) They are somatic cells (c) They do not metabolize (d) All their internal space is available for oxygen

Receptor sites for neurotransmitters are present on :

The water potential of pure water is :

Which of these techniques is used for 'virtual endoscopy'?

Weismann cut off tails of mice generation after generation but tails neither disappeared nor shortened showing that

What is meant by the term fitness according to Darwinism?