A vaccine

a. can be harmful because it contains pathogens such as viruses.

b. contains a changed pathogen, so the pathogen is no longer harmful.

c. provokes a response from the viral immune system.

d. all of the above

1. How do polar molecules form hydrogen bonds?

12. Fluid_ each cell. A. fills B. fills and surrounds C. doesn't fill D. surrounds

Passive transport rely on

Explain the difference between a waves period and frequency

How would you describe the position of the paper that you're reading related to your face

Why do animal cells have many small vacuoles and plant cells have 1 or 2 large vacuoles?

In the space below identify the name of each structure, A, B, and C

Wich planets have one or more moons? select for option Earth Jupiter Mercury Neptune Uranus

In living things, smaller substances are linked to make up larger substances. Which of the following correctly describes a larger substance made by linking smaller substances? Nucleic acids are linked to make up proteins.

Describe the environment in Madagascar