What is the process that turns on the transcription of a gene or genes?
A. induction
B. repression
C. translation
D. replication
Ans: A. induction
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Oxygen levels in the photic zone fluctuate over the course of a 24-hr period. If you were measuring dissolved oxygen over the course of the day, when would you expect to see the lowest levels of oxygen and why?
A. Mid-morning -- because fish are most active and their respiration rates are highest. B. Early afternoon -- when the surface water warms up and sinks to the bottom. C. Mid-afternoon -- because the activity of the Calvin cycle (the dark reactions) of photosynthesis are at their peak. D. Early evening -- when animals come to feed and disturb the surface waters. E. During the night -- because the light reactions of photosynthesis are inactive. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about oxygen levels? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
You observe two groups of frogs that are closely related. Males from each group "sing" with a species-specific song to attract a female frog. Females only respond to songs sung by males of their species
This is an example of ______-zygotic reproductive isolation between two species. A. pre B. post
Which of the following is true for ALL exergonic reactions?
A. The products have more total energy than the reactants. B. The reaction proceeds with a net release of free energy. C. Some reactants will be converted to products. D. A net input of energy from the surroundings is required for the reactions to proceed. E. The reactions are nonspontaneous.
In a woman’s monthly cycle, the hormone _____ is released when estrogen reaches a peak
a. luteinizing hormone b. oxytocin c. progesterone d. testosterone e. human chorionic gonadotrophin