Choose all the answers that apply.

Extinction:

only happens above the species level

cannot happen to more than one species at a time

can be caused by habitat destruction

happens when a species or population dies out

How does cell communication and the cell cycle relate to one another?

When a hypothesis is supported by data within an experiment it has been what

Explain how gel electrophoresis is used to analyze nucleic acids and proteins and to distinguish between two alleles of a gene?

When toxins enter through the gastrointestinal system it is called? (6 letter answer)

The metric system is a decimalized system of measurement used exclusively in the united states. a. True b. False

What happens if you don't have enough carbohydrates?

Describe the movement of "air" into and out of the respiratory system. Be sure to include the following structures (larynx, trachea, bronchi, bronchioles, and alveoli) while being specific about whether it is mainly oxygen or carbon dioxide moving

How are diffusion and osmosis different? A. Osmosis is the movement of proteins. Diffusion is the movement of water. B. Osmosis is the movement of water. Diffusion is the movement of chemicals and molecules. C.

Water molecules exhibit a property which enables them to stick to each other. What is this property referred to as? Polarity Cohesion Adhesion

Using hooke's, F spring = K*E, law find the distance a spring with an elastic constant of 4 n/cm will stretch if a 2 newton force is appied to it. A. 4 cm B. 2 cm C. 1/2 cm D. 8 cm