The letter “B” from the above figure represents
a. ectoderm.
b. endoderm.
c. mesoderm.
d. neural plate.
e. all of these.
Answer: a
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What would result if a leech had a mutation causing it to secrete low levels of anticoagulants?
A. The pain of the leech bite would cause the leech to be detected. B. The leech would have a hard time locating appropriate hosts. C. The blood would stop flowing after a short time. D. The leech would have a hard time remaining attached to its host. 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 leeches? 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?
Cell theory states that ________.
A. cells come from non-cell entities B. cells can be created from sexual reproduction or from asexual reproduction C. all life is made up of cells, and cells arise from preexisting cells D. cells go through the process of cell division
If you were watching the passage of material through the small intestine and saw the volume of digested ,aterial decrease as nutrients and water were absorbed, what part would you be looking at?
A. ileum B. duodenum C. jejunum D. all of the above
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