2. Why are enzymes necessary in order for chemical reactions to occur in living systems and organisms?

A vaccine can protect you against a disease because it A. destroy toxic substances from bacteria before they can make u sick B. stimulated your immune system against the pathogen C. Kills any pathogenic bacteria in your body D.

Sarah is doing an experiment on pea plants. She is studying the color of the pea plants. Sarah has noticed that many pea plants have purple flowers and many have white flowers. Sarah crosses a homozygous white flower and a homozygous purple flower.

An obese woman's body was found in an open field in Norman, Oklahoma. The woman's body was found lying flat on her back. The average temperature of this area was 70°. how long has she been dead?

11. Which of the following punctuation marks is used to introduce a short, direct quotation in the form of a complete sentence?

A nurse teaches a client about the side effects and precautions associated with the antipsychotic haloperidol. The nurse concludes that the teaching has been understood when the client makes which statement? A.

Amino acids with hydrophobic r groups are most often found buried in the interior of folded proteins. True or False.

Which division of the plant kingdom is made up of plants that have flowers or fruit? A.) Angiosperms B.) Gymnosperms C.) Nonvascular plants D.) Seedless vascular plants

explain how the elimination of a predator from a ecosystem might result in starvation amongst its prey speies

What organs function using the photereceptors

Suppose you didn't water a plant for two weeks. What do you expect the stomata would do