Why do plants provide bees butterflies hummingbird and other animals with nectar

In frogs, different mating seasons are a (n) to reproduction

What is a population?

What are the three stages of the general adaptation syndrome?

How does blood return back to the heart given the low venous blood pressure?

Huntington's disease is a congenital disorder that is passed from parent to child. a. true b. false

What happens to the molecules within a gas when the gas condenses? They gain energy. They lose energy. They drift apart. They move faster.

What causes the phase of the moon? A. The earth's shadow on the moon. B. How much of the sunlit side of the moon faces Earth C. Clouds blocking the moon's light.

If we removed the decomposers from this food web, how would it affect the balance of the ecosystem? A.) There would be an increase in dead matter and a lack of nutrients in the soil. B.

Which of the following statements is true? aWater and energy are not recycled in an ecosystem. bWeathering is the main way phosphorous is recycled. cThe total amount of energy in an ecosystem continuously increases.

How many chromosomes are present at the end of metaphase?