How do mammals, birds, reptiles ,plants deal with too much or too little heat?

Question

really need the information

Answer 1

they hide

Answer 2

Plant has pores that open up to control heat. Bird and mammal shiver when its too cold and sweat when its too hot. Reptiles sun when its too cold and dig in when its too hot.

Answer 3

Mammals:
1. Shivering
2. Behavioural (e.g. sitting in the sun, hiding in a nest, huddling together etc.)
3. Reduced blood flow to body extremities.

Plants: Dunno, mate, I'm a zoologist.