Mention two modification in reptiles required for terrestrial mode of life.

Requirements for stress free life.

Give the scientific reasons: Birds (Aves) are adpated to aerial mode of life.

Ramesh and Govind are two friends of a class.Ramesh wants to buy 5 pens and 7 notebooks,Govind wants to buy 3pens and 10 notebooks.Both of them went to a shop which they have selected was Rs.5 and Rs.12.Using matrix multiplicaton,find the amount required for each one of them.

The half life period of a first order chemical reaction is 6.93 minutes. The time required for the completion of 99% of the reaction will be (log2=0.301)

What is the half life of a first.order reaction if time required to decrease concentration of reactant from.0.8M to 0.2 M is 12- h?

The half life of a substance in a certain enzyme catalyzed reaction is 138s. The time required for the concentration of the substance to fall from 1.28 mg L^(-1) to 0.04 mg L^(-1) :

Mention two similarities between A turtle and pila.

Mention two similarities between A frog and crocodile.

What is social health? Mention the factors required for good social health.