Which is true about ecosystems?

A. Once defined, an ecosystem is a unit scientists can analyze.

B. All ecosystems are the same size.

C. Biotic and abiotic factors are the same in most ecosystems.

D. All ecosystems are identical.

Describe the pros and cons of genetic engineering to modify food and in-vitro fertilization

Shrimp that live in the cold waters off Alaska will die if introduced into warm water. One likely reason these shrimp do not survive is that enzymes in the shrimp (1) start to replicate (2) change shape (3) are composed of fat molecules that melt

What is the process by which ancestral iguanas developed into the present-day iguanas of the galapagos islands?

Hunting lions has been banned in some parts of Africa. If this law is enforced, what can we expect to happen to the populations of small mammals in the same locations? A) The small mammal populations will decrease.

An example of an infectious disease that is caused by a virus is Select one: a. athlete's foot. b. trichinosis. c. Lyme disease. d. the common cold.

He removal of abnormal glandular tissue is known as

Is a cat a mammal or reptile?

What is the gradual sequential regrowth of a community of species after a forest fire?

Why are bacteria needed in the nitrogen cycle? A) Other living things cannot use atmospheric nitrogen. B) Other living things cannot use the nitrogen in plants. C) Bacteria are the main nitrogen reservoir.

Ant lions are small insects that dig funnel-shaped depressions in sandy areas. They hide in the dirt at the bottom of the funnel.