The two image-forming lenses of a compound light microscope are
a. the condenser and objective.
b. the condenser and the ocular.
c. the objective and ocular.
d. none of these choices.
c
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Your cat has fleas! You look at the ingredients in the flea control ointment, and see that it contains methoprene, a juvenile hormone analog. What does this accomplish?
Many insecticides target insect hormones such as juvenile hormone or ecdysone to disrupt development. This is preferable to simply killing the insect with more broadly-acting toxins. A. prevents flea larvae from maturing B. kills juvenile fleas C. reinvigorates the cat's immune system, to repel the fleas D. forces juvenile fleas to mature early, disrupting development of reproductive organs 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 juvenile hormone? 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?
Which brain structure is incorrectly matched with its function?
a. thalamus?relays messages to cerebrum b. pons?regulates emotional response c. medulla?regulates coughing and sneezing d. cerebellum?regulates muscle coordination e. inferior colliculi?regulate auditory reflexes
Articular discs (menisci)
What will be an ideal response?
The existence of epigenetic effects suggests that
a. in violation of the central dogma, information can be transmitted from protein and incorporated into nucleic acid. b. covalent modification of DNA must not persist through replication. c. protein complexes associated with DNA must be assembled de novo following replication. d. proteins may have been the original genetic material. e. the protein(s) responsible must be self-assembling.