The Dlx/Hox gene control system operates across
many phyla, which is strong evidence that it evolved
a very long time ago. Which of the following is true
concerning this relationship?
a. Hox activates Dlx.
b. Dlx came first due to multilimbed animals in the
fossil record.
c. Hox came first due to legless animals in the
fossil record.
d. It randomly affects the number of limbs within
insects.
e. None of these are true.
Answer: b
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A scientist is investigating a hormone response in rose bush stems by removing the apical meristems of the main stems. What is the most likely result of this experiment and what hormone is responsible?
A. New apical buds will develop under the influence of auxin. B. Larger, deeper roots will form under the influence of cytokinin. C. More leaf buds will appear along the main stems under the influence of auxin. D. Flowers will turn yellow and fall off under the influence of auxin. E. Lateral buds will develop under the influence of cytokinin.
Research for a universal flu vaccine tends to focus on
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