The structure that secretes prostaglandins into the ejaculate is the ____

a. testes
b. epididymis
c. vas deferens
d. seminal vesicle
e. prostate gland


ANSWER: d

Biology & Microbiology

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Which of the following have been an effective immunosuppressant for use in transplantation?

A. Amphotericin B and cephalosporin B. Amphotericin B and cyclosporin A C. Amphotericin B and tacrolimus D. Cephalosporin and tacrolimus E. Cyclosporin A and tacrolimus

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A holoenzyme is a combination of a protein and one or more substances called ________.

A. substrates B. apoenzymes C. cofactors D. ribozymes E. catalysts

Biology & Microbiology

The Great Pacific Garbage Patch is a region of the north central Pacific where a high concentration of confetti-like

plastic particles swirl slowly around an area as large as the state of ____.

a. Alaska b. Idaho c. Rhode Island d. Texas e. Pennsylvania

Biology & Microbiology

Food chains rarely have more than three levels of consumers because

a. the animals are too large to search for prey. b. the growing season of plants is not long enough. c. pyramids do not go that high. d. the amount of energy available is too small. e. humans intervene.

Biology & Microbiology