The thoracic cavity contains the heart and
a. stomach.
b. lungs.
c. liver.
d. brain.
e. pancreas
B
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An unknown organism from an alien planet is observed and found to have a diploid state only
following fertilization. Meiosis follows and the majority of this organism's life is spent in a haploid state. Which multicellular organism on earth most closely resembles this type of life cycle strategy?
a. humpback whale b. maple tree c. fern d. some algae e. all plants and some fungi
Describe how stomach ulcers can develop in some people (but not others) due to the activity of native microorganisms
What will be an ideal response?
During which stage of the cell cycle is cell growth and replication of organelles most significant?
A. M phase B. G1 phase C. G2 phase D. S phase E. G0 phase
The primary role of the two sperm in the pollen is to
A. produce the pollen tube. B. prevent embryo production. C. release proteins for germination. D. ensure fertilization of the egg and the central cell.