Why are bats not placed in birds?

$(a)$ Give a difference between lizards and snakes.
$(b)$ Name the type of nutrition in fungi.

Mention any one characteristic feature of saprophytes.

Write appropriate terms for the following:
$(i)$ Animals that are able to maintain a constant body temperature over a wide range of environmental temperatures.
$(ii)$ Animals which have a pseudocoelom.
$(iii)$ Plants which bear naked seeds.

All organisms that are similar enough to breed and perpetuate are called

State reasons for the following:
$(a)$ Tapeworm does not have a digestive tract.
$(b)$ Frogs use both skin and lungs for breathing.
$(c)$ Birds have pneumatic/hollow bones.