Generally, a pair of homologous chromosomes __________.
A) carry the same genes
B) are the same length, shape
C) interact at meiosis
D) all of these choices
Answer: D) all of these choices
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Which one of the following is NOT a component of each monomer used to make proteins?
A) a phosphorus atom, P B) an amino functional group, NH2 C) a side chain, R D) a carboxyl group, COOH
In which PO2 environment would hemoglobin most easily release its O2?
A. 75 mm Hg B. 100 mm Hg C. 65 mm Hg D. 90 mm Hg E. 40 mm Hg 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 oxygen levels? 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 human embryo possesses __________ by the
end of week four. a. pharyngeal arches b. a notochord c. a forming neural tube d. somites e. all of these
Which cells in the testes secrete testosterone?
a. Sertoli cells b. luteinizing cells c. glycoprotein cells d. interstitial cells e. sperm cells