Field capacity

Answer the following briefly:

i) Why don’t Paramecium and jelly fish have a circulatory or respiratory system?

ii) Mention any two functions of plasma proteins.

iii) How does sex determination take place in birds?

iv) Why does a mouse looking for food use upto thirty times more energy than a lizard of the same weight?

Vernalization

What is the sliding filament model of movement of muscles? How does the sliding movement occur at molecular level?

Osmotic pressure

Modes of respiration in animals

Action Potential