After spending years in the ocean, a mature salmon swims up its home river to return to its birthplace. this behavior is an example of a (n) :

How does a a dentist chair work and the system it uses? Pneumatic or Hydraulic system

Which is a density-independent factor in controlling a population? A. Floods B. Access to light C. Water supply D. Predators

How does rain water get polluted?

What two factors are important to grasslands?

Sexual reproduction can be divided into two different types based on which of the following? a. the type of cellular division b. body symmetry c. the location of fertilization d. the presence of male and female animals

Explain how oral contraceptives work to prevent pregnancy

What are two non living things, cheetahs interact with?

A classmate states that mitochondria and chloroplasts descended from the same type of bacteria. Does the evidence support this? explain your reasoning

Can gel electrophoresis separate DNA fragments

Which question can be answered using the scientific method? A) what was the highest temperature that was recorded yesterday? B) what is the most interesting aspect of the light dependent reactions?