Label $a, b, c$ and $d$ given in the figure. Give the function of $(b)$.

Mention any three major differences between Porifera and Coelenterata.

State reasons for the following:
$(a)$ Protists have appendages like cilia or flagella.
$(b)$ Angiosperms are called so.
$(c)$ Fish have scales on their body.

Which group of animals have haemocoel?

Thallophyta,Bryophyta,and Pteridophyta are called 'Cryptogams'. Gymnosperms and Angiosperms are called 'Phanerogams'. Discuss why? Draw or describe one example of a Gymnosperm.

$(i)$ To which division of Plantae do algae belong? Write one characteristic of the division. Give two examples.
$(ii)$ Name the group:
$(a)$ Which includes unicellular eukaryotic organisms.
$(b)$ In which the mode of nutrition is saprophytic.
$(c)$ In which seeds are not enclosed in fruit.
$(iii)$ Classify flowering plants on the basis of the number of cotyledons present in the seed.