The 'Origin of Species' was written by:

What are gymnosperms? Give two characteristics.

Who proposed the two kingdom classification?

State the importance of classification.

To which class of Animalia does the housefly belong? Mention any three characteristic features of this class of animals. Give two other examples of this class of animals.

Associate the following features with appropriate organisms and their kingdom [in $(ii)$ and $(iv)$],division [in $(i)$] and phylum [in $(iii)$ and $(v)$].
$(i)$ Presence of pyrenoids
$(ii)$ Presence of heterocysts
$(iii)$ Presence of genital papillae and anus
$(iv)$ Presence of chloroplast and flagella
$(v)$ Presence of palp and parapodia