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

2. Did you notice a difference in the rate of respiration between the various sugars? Did the artificial sugar provide a good starting material for fermentation?

Which is found in both DNA and RNA? A. ribose B. uracil C. adenine D. thymine

You observe a tissue under the microscope and see intercalated discs between adjacent cells. which tissue are you observing

Which best describes how an ionic bond forms? A. One atom pulls an electron from another atom. B. Two atoms both lose an electron. C. Two molecules share an electron. D. Two atoms share valence electrons

The progress of agriculture technology and the improvements of farming have come from many fields of knowledge.

8. In the S-Phase of the cell cycle; DNA is replicated. Why would eukaryotic cells need to replicate DNA before the nucleus divides? A. To trigger genetic transfer of DNA. B. To encourage rapid mutation rates in the organism. C.

The patient has been placed on a nitroprusside drip for the treatment of a hypertensive crisis. which mechanism of action does the nurse know is true for nitroprusside?

How many oxygen molecules (O₂) are required each time a molecule of glucose (C₆H₁₂O₆) is completely oxidized to carbon dioxide and water via aerobic respiration,? A) 1 B) 3 C) 6 D) 12 E) 30

Which of the following sentences are correct? (1) for millions of years dinosaurs ruled the earth; they roamed freely over the land and through the oceans.

2. A flower arranger is growing some flowers in a garden. He has seeds for red, and seeds for pink plants. Both colours are found or the same allele as each other. Red is the dominant colour, while pink is recessive.