Charles Darwin first described the idea of evolution in his book "The Origin of Species". Define the concept of evolution.

Which one is a true fish?

State whether the following statements are True $(T)$ or False $(F)$:
$(a)$ Gymnosperms differ from Angiosperms in having covered seeds.
$(b)$ Non-flowering plants are called Cryptogamae.
$(c)$ Bryophytes have conducting tissue.
$(d)$ Funaria is a moss.
$(e)$ Compound leaves are found in many ferns.
$(f)$ Seeds contain an embryo.

Enlist four main features of organisms placed in the kingdom Protista.

$(a)$ Associate any three phyla of Animalia with triploblastic body organisation and bilateral symmetry.
$(b)$ State the meaning of triploblastic body organisation and bilateral symmetry.
$(c)$ On the basis of presence or absence of coelom,compare the three phyla answered in $(a)$.

Justify giving one reason: crocodiles have a four-chambered heart,but are still classified as reptiles.