What happens to energy when living cells break down molecules?

In ecological succession the first living things to colonize a hitherto barren area is called a

When is an ecosystem disturbance reversible? a. when it alters the biotic and abiotic nature of the habitat. b. when no genetic harm has been done, such as mutations An ecosystem disturbance of any kind is irreversible. c.

A food company hydrogenated a barrel of fat. The treatment ... A food company hydrogenated a barrel of fat. The treatment ... (a) made the fat less fluid. (b) made the fat less saturated. (c) lengthened the fat tails.

Increased pressure in the ventricles would close what valve (s) ? Increased pressure in the ventricles would close what valve (s) ? AV valves only semilunar valves only both semilunar and AV valves

How dose the structure of the saguaro cactus stem benefit the plant

DNA replication results in: Group of answer choices 2 DNA molecules that each contain a strand of the original 1 new molecule of RNA 1 new DNA molecule, 1 old molecule is conserved 2 completely new DNA molecules

5. Which is the first step of the scientific method?

Identify the four postulates of natural selection. Select all that apply. 1. Individuals in a population all possess the same traits. 2. All individuals in a population have equal reproductive success. 3. Some trait differences are heritable. 4.

Competition is central to the theory of natural selection. why does competition occur?

Name three geological processes that have shaped the earth