How does a vaccine work?

a. it kills viruses

b. it protects cells from viral infection

c. it prepares the immune system to recognize viruses

d. it prevents viruses from being transmitted from an infected person

What moved toward the shoreline and became the first plants during the Ordovician period?

What kind of molecule is formed when many disaccharid are combined

A cell has a concentration of 0.8% carbon dioxide gas and 0.4% oxygen gas. The blood surrounding the cell has an oxygen concentration of 1.2% and a carbon dioxide concentration of 0.1%. What will the cell lose? What will a cell gain?

After Gerry mows his lawn, he often puts the grass clippings into his flower garden. How will this affect his garden

Osteoporosis is a condition in which the density of bones is decreased so much that the individual is at a higher risk of fractures. The more calcium in the bones, the better the bone density.

Which of these scenarios illustrates natural selection due to behavior

What is a device that converts energy of motion into electrical energy

Which type of connective tissue makes up the greatest proportion of the skeleton of a human embryo?

Which substance is not absorbed by the body when using snuff?

Which set of terms represents a haploid/diploid pair? a) Gamete/gametophyteb) Sporophyte/gametophytec) Spore/sporophyted) Zygote/egg