(a) Write one main characteristic feature that differentiates Gymnosperms from Angiosperms.

(b) Give one example each of Gymnosperm and Angiosperm.

Identify the animal group having:

(a) Body spiny and radial symmetry.

(b) Bones light and hollow.

(c) Soft-bodied animals supported by calcareous shells.

(d) Four pairs of jointed legs, head and thorax fused.

Name the group of plants that belongs to the division Thallophyta.

Give four main features of phylum coelenterate.

Characteristics of some organisms are given. Identify their group and give one example of each.

(a) Single called, eukaryotic and photosynthetic

(b) The body is divided into segments, may be unisexual or hermaphrodite.