The cell membrane around a cell forms a barrier that protects and regulates the cell. Which best describes those that can pass through?

What are 4 ways bacteria and viruses can be transmitted?

Fats are the main substances that are essential for body growth and repair. Answer a. True b. False

What is a similarity between wind and water? They are both types of non-renewable resources. They are both sources of power for objects that people use. They can both be polluted by pesticides and fertilizers.

Which is true concerning animal viruses? a. lack an envelope when they leave the host cell b. attack the host cell by exocytosis c. have an outer coat of nucleic acid d. some have RNA genomes e. all of the above

When should a bar graph be used

Why is regualtion of the cell cycle important?

Which of the following is not water soluble?

If the concentration of oxygen in a body tissue cell is 5% and the concentration of oxygen in the blood surrounding the cell is 10%, which direction will the oxygen diffuse?

What is the type of allele that only affects the phenotype in the homozygous condition?

Major natural events, such as volcanic eruptions, significantly change the environmental conditions of the areas where the events occur. What happens to local populations that are unable to adapt to the new conditions or to move to other areas?