A substance that enters Earth's cycles and does harm to living things is

A. oxygen.

B. freshwater.

C. a pollutant.

D. hydrogen

What is the relationship between a scientific theory and a scientific law

Moldy bread! Where did that come from? Moldy bread indicates that a fungus is growing in and on your bread. But how did it get there? The bread was in a plastic bag.

Describe the process of photosynthesis using chemical equation.

Why are there so many different species of honeycreeper living on the Hawaiian Islands? a. Predators and diseases caused populations to separate. b. Varying climates among the islands have resulted in different species. c.

According the theory developed by Lynn Margulis (endosymbiotic theory, why was it adaptive for a host cell to keep an engulfed cell alive, rather than digesting it and using it as food?

Why can psychologists claim that psychology is one of the oldest scholarly disciplines as well as one of the newest? Explain why modern psychology is a product of both nineteenth-century and twentieth-century thought.

The type of stress is most commonly associated with illness and disease is [blank] stress.

Describe the components of the peripheral nervous system and central nervous system and explain how they work together in your body.

Oil spills happen in our oceans. Some oils contain volatile organic compounds; these compounds make the oil denser.

Describe the overall changes in matter that occur during the light independent reaction.