A natural or human-caused event that changes a biological community and usually removes organisms from it. includes things like fire and storms, which play pivotal roles in structuring many communities.

What happens to a plant that doesn't get enough water

Glucose and animo acids move in or out of a cell by __. A) passive diffusion B) facilitated diffusion C) active transport D) endocytosis and exocytosis

Which answer gives both a positive impact and a negative impact that are associated with the effects of nitrogen - and phosphorus-enhanced fertilizers? A. increased algal blooms and damage to drinking water b.

How do humans effect the ecosystem

Which statement about DNA replication is true? A. Eukaryotes only have one circular chromosome that unwinds at multiple locations. B. Prokaryotes only have one origin of replication to initiate replication. C.

Which layer of skin is least protected by melanin?

A true-breeding purple plant and a true-breeding white plant cross-pollinate. The offspring will be

List the principal structures of the ventilatory system in the order that air passes from the atmosphere into the lungs

Where is the fulcrum on a triple beam balance?

The central nervous system (CNS) contains a number of components that perform specific functions within the body. Some functions, such as breathing, swallowing, and blood circulation, are involuntary, or done without conscious control.