Which of the following is NOT a characteristic of connective tissue proper?
What will be an ideal response?
All of the preceding are characteristics of connective tissue proper.
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When a vesicle moves along microtubules toward the center of the cell, the molecular motor(s) _____ are used?
A. dynein B. both kinesin and dynein C. Molecular motors are not required for movement along microtubules. D. kinesin
Old pine stumps are dug up, split into pieces and sold as "fatwood". Fatwood is used as a fire starter. Why is this done?
A. The wood in the stumps is porous and dry, thus it burns easily. B. The high concentration of volatile organic compounds makes the wood flammable. C. Pine bark does not absorb water and is flammable. Clarify Question What is the key concept addressed by the question? Gather Content What do you already know about pine? What other information is related to the question? Choose Answer Given what you now know, what information 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?
The reason that some individual hormones have so many different effects is that
a. they influence gene transcription. b. they trigger a second messenger system that produces a cascade effect. c. there are a great many different cells in different tissues that have specific receptors for the hormone. d. the hormone is carried throughout the body and only a small amount is needed to produce its effect. e. they are polar molecules.
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Portion of Figure 22.11
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Refer to the above figure for questions.
In the illustration above showing the haploid phase in the life cycle of a fern, what part represents the male gametangium?
A. 1 B. 2 C. 3 D. 4 E. 5