Describe the progressive evolution of mammals from their synapsid ancestors.

Make a table of the major Super groups that include the protozoan groups listed under them giving at least on important characteristic that distinguishes each group.

What is torsion? Briefly discuss the process of torsion in gastropods.

Briefly describe the organisation of Malacostraca. Give a few examples of decapod malacostracans.

The special adaptations of birds all contribute to two factors essential for flight namely, more power and less weight. Explain how each of the following contributes to one of the other or both:

(i) Endothermy

(ii) Respiratory system

(iii) Skeletal system

(iv) Excretory system.

प्रमुख अधिसमूहों को सूचीबद्ध करते हुए एक सारिणी बनाइए जिसमें उनमें दिए गए  प्रोटोजोआई समूहों को कम से कम एक ऐसी प्रमुख विशेषता बताते हुए सूचीबद्ध कीजिए जो प्रत्येक समूह को विभेदित करती हो।

तनुलवणी