In the human male, sperm are produced in the ____
a. bulbourethral glands
b. prostate
c. seminiferous tubules
d. vas deferens
e. epididymis
ANSWER: c
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What would result if a leech had a mutation causing it to secrete low levels of anticoagulants?
A. The pain of the leech bite would cause the leech to be detected. B. The leech would have a hard time locating appropriate hosts. C. The blood would stop flowing after a short time. D. The leech would have a hard time remaining attached to its host. 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 leeches? Choose Answer · Given what you now know, what information and/or problem solving approach 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?
Of the following invertebrate groups, the group most closely related to the chordates is the _____
a. annelids b. mollusks c. crustaceans d. echinoderms e. cnidarians
What is wood?
a. secondary xylem that has accumulated outside a cylinder of vascular cambium b. secondary xylem that has accumulated inside a cylinder of vascular cambium c. primary xylem that has accumulated outside a cylinder of vascular cambium d. primary xylem that has accumulated inside a cylinder of vascular cambium e. vascular cambium cells
Antimicrobial agents usually work best at high temperatures and high pH levels.
Answer the following statement true (T) or false (F)