Mammals can maintain a constant body temperature.

If you plant this seed, beautiful flowers will bloom.

My dream is to travel the world.

This is the most beautiful flower.

The vaquita is an endangered species and the most rare marine mammal in the world.

This scarce mineral is very expensive.

My misgivings about his plan is that there's a possibility he might fail.

He has misgivings about the plan.

This species is on the brink of extinction.

That species is on the verge of extinction.