What stimulates secretion of testosterone by Leydig cells?
A. FSH
B. Testosterone
C. Estradiol
D. LH
E. Progesterone
Answer: D
You might also like to view...
A protein that has been transported past the outer chloroplast membrane would have to pass how many more membranes to reach the stroma and thylakoid lumen, respectively?
A. 0,1 B. 1,2 C. 2,3 D. 3,4 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 chloroplasts and membranes? What other information is related to the question? Choose Answer Do you have all necessary information to determine what was produced during the plant experiment? 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?
Transposition is a(n)
A) homologous recombination event. B) analogous recombination event. C) site-specific recombination event. D) general recombination event.
Recall that leaves form in distinct arrangements (whorled, opposite or alternate) on the stems of vascular plants. How might chemical factors secreted by neighboring structures cause new leaves to form in these particular patterns?
Select all correct choices. A. Leaf primordia secrete chemical inhibitors that prevent the formation of leaves nearby. B. Leaf primordia secrete chemical activators that promote the formation of leaves nearby. C. Mature leaves secrete chemical inhibitors that prevent the formation of leaves nearby. D. Mature leaves secrete chemical activators that promote the formation of leaves nearby.
Which of the following statements is TRUE of highly repetitive sequences?
A. They play a vital role in transcription. B. They play a vital role in translation. C. They can be found millions of times in a eukaryotic genome. D. They typically increase fitness of the organism. E. They typically decrease fitness of the organism.