Why are taiga ecosystem are a home to evergreen trees ?

Groups of organisms with low biotic potential, such as gray whales, that produce at most one offspring every other year a) are r-selected b) are k-selected c) are not subject to density-dependent limiting factors d) show the initial stages of the extinction process e) have escaped from the processes of natural selection and adaptation

What was the land like over 500 million years ago? what was under the sea?

This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment