Question

please answer 31,38,39,40.

Answer 1

Flame cell :- Structure which helps in osmoregulation and excretion in flatworm are called flame cell.

Bird's endoskeletons are hollow .

40. no, sometimes eggs are more comparison to young ones Ex. snake lay 10 to 12 eggs at one time. and female dog give birth 5 to 6 puppies in one time.