Reference is often made to adapter molecules when describing protein synthesis in that they allow amino acids to associate with nucleic acids. To what class of molecules does this term refer?
What will be an ideal response?
tRNA
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Lampreys completely lack parathyroid glands. Suggest why these glands may be important for other vertebrates, but not for jawless fish.
A. Because they are parasitic, lampreys get plenty of calcium from their hosts. B. Living in the ocean, they are surrounded by large amounts of sodium, chloride, and magnesium ions. C. Jawless fish employ a different system than other vertebrates to regulate blood sugar. D. Since they have a cartilaginous skeleton but not true bone, they have less need to regulate calcium levels. 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 the parathyroid gland? 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 statement about the geologic time scale
is incorrect? a. Mammals originated early in the Mesozoic era. b. Adaptive radiation of flowering plants, insects, and birds took place during the Mesozoic era. c. Mass extinction of the dinosaurs occurred about 65 million years ago. d. Reptiles originated during the Paleozoic era. e. Eukaryotes originated during the Proterozoic eon.
What is the main purpose of flowers?
A) To attract pollinators B) To be pleasing to the human eye C) To attract attention in the landscape D) To attract predators
A(n) ________ postsynaptic potential is initiated when neurotransmitter binding to receptor proteins causes the postsynaptic neuron to become less negative
Fill in the blank(s) with correct word