_____ birds lay eggs on the ground and keep them warm.

Bird eggs are

In the road of Laxmi's locality there is a ladder of 15m length kept in such a way that it has touched Pujas's window at a height of 9 m above the ground. Now keeping the foot of the ladder at the same point of that road, the ladder is rotated in such a way that it touched Laxmi's window situated on the other side of the road. If Laxmi's window is 12m above the ground, then determine the breadth of that road.

Assertion: The duck-billed platypus and the spiny anteater, both are egg-laying animals yet they are grouped under mammals. Reason: Both of them have seven cervical vertebrae and 12 pairs of cranial nerves.

A jawless fish which lays eggs in fresh water and whose ammocoete larve after metamorphosis return to ocean is

When a body falls on the ground from a height ,it becomes slightly warm-why ?

The number of RBCs in man increases if he lives at a higher altitude because 1. there is less oxygen in mountains 2. there is more oxygen at the mountains 3. there are no germs in the air in mountain 4. more heat is required to be produced in the body for keeping warm

Koel or Cuckoo lays eggs in the nest of

Bombyx mori lays its eggs on the leaves of tree