Cells were first discovered in the
__________century.
a. 14th
b. 15th
c. 16th
d. 17th
e. 18th
Answer: c
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Which of the following would NOT be a component of a newly produced HIV virus particle?
A. protein capsid B. RNA C. reverse transcriptase D. viral envelope E. complementary DNA 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 HIV? 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?
B cells are primarily activated by the activities of ________
a. macrophages b. platelets c. helper T cells d. antigen and complement
Trees are able to transport water from the roots to the top branches because
A. cohesion bonds water molecules to each other strongly. B. liquid water has a higher density than the air in the plant cells of the roots, trunk, and branches. C. water acts as a solvent of the tree cells as it moves upwards to the branches. D. adhesion bonds water molecules to the inside of the plant conducting tubes. E. leaves are hydrophilic.
The change in the developmental fates of different
cell lineages in response to signals from adjacent tissues is a. contact inhibition. b. ooplasmic localization. c. embryonic induction. d. pattern formation. e. all of these.