Fungi produce spores through meiosis. What happens to the spores?
a. Spores undergo meiosis to become four distinct fungal gametes.
b. Spores undergo nuclear fusion to become multicellular diploid zygote.
c. Spores undergo mitosis to become multicellular haploid organisms.
d. Spores undergo hibernation until they encounter viable gametes.
c. Spores undergo mitosis to become multicellular haploid organisms.
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You are a doctor are examining a patient whose thymus never developed because of DiGeorge syndrome
You know that this medical condition is usually due to the deletion of a section of chromosome #22 and that a single copy of shortened chromosome causes the syndrome. The patient's parents are both phenotypically normal with normal thymuses. This suggests that _____________. A. both parents are heterozygous B. both parents are homozygous recessive C. the individual inherited the trait from his grandparents. D. the deletion occurred during gamete formation and thus was not part of the parents' genome.
Arrange the structures through which air passes upon entering the body in the proper sequence
1) alveoli 2) bronchi 3) larynx 4) bronchioles 5) pharynx
a. 5 ? 3 ? 6 ? 2 ? 4 ? 1 b. 3 ? 5 ? 2 ? 6 ? 1 ? 4 c. 2 ? 4 ? 3 ? 5 ? 6 ? 1 d. 3 ? 6 ? 5 ? 2 ? 4 ? 1 e. 5 ? 6 ? 3 ? 4 ? 2 ? 1
Which of the following does NOT have much potential energy?
A) A diver on a springboard B) A glucose molecule C) A ball that has rolled downhill and stopped D) A 9-volt battery E) A water droplet at the top of a waterfall
Why do plants use cotransporters instead of ion channels to transfer anions into cells?
A) Cotransporters are able to transfer anions against the membrane potential gradient, but ion channels cannot. B) Cotransporters can transfer ions across cell membranes, but ion channels cannot transport ions across cell membranes. C) Cotransporters are able to transfer anions against the proton gradient, but ion channels cannot. D) Anions are too bulky to be transported by ion channels.