Name an organism sensitive to $SO_{2}$ in air.

List out some common features in cat,rat and bat.

The endoskeleton of fishes is made up of cartilage or bone. Classify the following fishes as cartilaginous or bony: Torpedo,Sting ray,Dog fish,Rohu,Angler fish,Exocoetus.

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

Write true $(T)$ or false $(F)$ for the following statements:
$(a)$ Whittaker proposed five kingdom classification.
$(b)$ Monera is divided into Archaebacteria and Eubacteria.
$(c)$ Starting from Class,Species comes before the Genus.
$(d)$ Anabaena belongs to the kingdom Monera.
$(e)$ Blue green algae belongs to the kingdom Protista.
$(f)$ All prokaryotes are classified under Monera.

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