Which of the following is a phototroph?
A) a tree
B) a mushroom
C) soil bacterium
D) an earthworm
E) a person
Answer: A
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How does GIFT differ from IVF?
A. Fertility drugs are used to obtain the eggs. B. A woman is contracted and paid to carry the baby. C. The eggs and sperm are placed in the oviducts immediately after being brought together. D. A single sperm is injected into an egg. E. The sperm comes from a stranger.
On average, how many red blood cells are there in a microliter of blood?
a. 5,000 b. 50,000 c. 500,000 d. 5,000,000 e. 50,000,000
The small circles of DNA found in bacteria are called GENOMES.
a. true b. false
Contractile vacuoles
A) are generally found in protists that inhabit salt water. B) help in the excretion of excess salt. C) prevent cells from bursting as a result of the influx of excess water. D) allow organisms to avoid dehydration by absorbing water from the environment.