The two processes that produce variations in living things are

1. sexual and asexual reproduction

2. asexual reproduction and changes in the environment

3. mutation and changes in the environment

4. sexual reproduction and mutation

A gas that is used by animals and plants in aerobic resperation

True or False: Many climate scientists in 1975 agreed with Broecker, in that the Earth is heating up. A. True B. False

What is the main source of groundwater?

Atelectasis is caused by occupational exposure to coal dust. a. true b. false

Cells and transport proteins are physically prevented from passing through the filtration membrane. This has the following effect on filtration. A. increased osmotic pressure in the filtrate the draws plasma through the membraneB.

This is a genetic mutation caused by the insertion or deletion of one or more nucleotides that changes the amino acid sequence from the site of the mutation forward.

WhAt is sceince in english

The development of some organisms, like sea turtles, are affected by the temperature at which the eggs are incubated. Typically, cooler temperatures produce more males, and warmer temperatures produce more females.

What is one function of the pyloric sphincter? a. secretes hormones into the stomach b. prevents the contents of the small intestine from backing up into the stomach c. secretes acid into the stomach d.

What are some examples of how environmental factors affect genetic variation and influence natural selection