What are possible effects of long-term environmental changes? check all that apply.
1. adaptation
2. extinction
3. migration
4. speciation
5. starvation

What is called the "building block" of life?

'which of these statements about the scientific method is not true? all experiments must follow the same number of steps in the procedure. experiments may be repeated several times. some unexpected results can be beneficial. experimental results may or may not support the hypothesis.

In which of the following relationships is one organism always benefited while the other organism is always harmed