Haemocoel is found in

What will you look for to identify the sex of the following?

Assertion: Lateral line system is found in fishes and aquatic larval amphibians.
Reason: Lateral line system has receptors of sensory cells derived from ectoderm.

Assertion $A$: Fishes possess gills,fins,and scales.
Reason $R$: Fishes are a form of taxon.
Which option is correct for Assertion $A$ and Reason $R$?

Which of the following characteristics is $NOT$ shared by birds and mammals?

Which kingdom consists of organisms that are multicellular,aquatic or terrestrial,heterotrophic,and eukaryotic?