The membrane enclosing cytoplasm of a cell which is

Mycorrhiza is a symbiotic association between :

Match the Column I with Column II and select the correct answer using the codes given below:

At the extreme end (maximum displacement) of a simple harmonic oscillation:

Which muscle type is involuntary and found in internal organs?

Which one of the following vitamins is synthesized in our own skin?

The communication between the central nervous system and the other parts of the body is facilitated by 

In blood, platelets are required for

NaOH + HC1 -> NaCl + H₂ O in the given chemical reaction 

Which of the following is not a subatomic particle?

What is the primary component of natural gas?