Pairing of homologues and crossing over occur during ____
a. anaphase I
b. metaphase II
c. prophase I
d. prophase II
e. telophase II
ANSWER: c
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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?
Connective tissue includes adipose tissue, tendons, bone, cartilage, and blood. What do all these tissues have in common?
A. They are all hard tissues. B. They all physically bind other tissues together. C. They all provide structural support to the body. D. They all consist of few cells sparsely distributed in large amounts of extracellular material.
Enzymes known as lyases participate in ________ reactions
A) anabolic B) catabolic C) both anabolic and catabolic D) neither anabolic nor catabolic E) oxidation-reduction
Which one of the following structures is not found in all adult and larval tunicates?
A. Gill slits B. Incurrent siphon C. Notochord D. Excurrent siphon E. Pharynx