The depth to which light penetrates with sufficient intensity to support the activities of photoautotrophic organisms in the ocean is called the ________ zone.
Fill in the blank(s) with the appropriate word(s).
photic
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If genes are described as "sex linked," then they are ________.
A. typically on the Y chromosome B. typically on the X chromosome C. located next to one another D. expressed only in women or only in men
Viruses travel through animals mainly by lysing cells and then spreading to other cells. Plant cells are not easily lysed. If a pathogen enters a plant cell and does not initiate a hypersensitive response, what is the most likely way the virus would spread to other plant cells?
A. Through the chloroplasts. B. Directly through the cell wall. C. Through the central vacuole. D. Through the plasmodesmata. E. Through transport vesicles. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about how plant viruses spread between cells? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? 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?
The function of valves in the heart is to
a. form blood cells. b. participate in immunity. c. prevent backflow of blood. d. prevent clot formation. e. push blood ahead.
________ play a pivotal role in programmed cell death
A) Cyclins B) Telomeres C) Proto-oncogenes D) Oncogenes E) Telomerases