A deficiency of which mineral produces a goiter in humans?
a. calcium
b. iodine
c. magnesium
d. manganese
e. zinc
B
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In your Drosophila laboratory, you find a larva that is missing segments Lb, T1, T2, and T3. This larva probably has a mutation in a ___________ gene.
A. pair-rule B. gap C. maternal effect D. segment-polarity E. gap or segment-polarity
Based on the pollen to ovule ratios, which statement appears to be true?
a. Species A probably distributes its pollen via the wind. b. Species B probably distributes its pollen via the wind. c. The pollen from species B is probably distributed by animals. d. Both species probably distribute their pollen via the same method
The chemical reactions in cells are called ____
a. substrate b. coenzymes c. receptor sites d. metabolism e. active site
What is the difference between a totipotent stem cell and a pluripotent stem cell? What piece of evidence would you
need to distinguish them? What will be an ideal response?