What is the last structure that a sperm travels through as it leaves the body?
A. Ureter
B. Urethra
C. Vas deferens
D. Ejaculatory duct
E. Epididymis
Answer: B
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Polymers are synthesized by ________ reactions and broken down into their constituent monomers by ________ reactions
Fill in the blank(s) with the appropriate word(s).
The common garter snake is a predator of the rough-skinned newt. These newts produce a
potent neurotoxin that is concentrated in their skin, but garter snakes have evolved resistance to this toxin.
This is an example of __________.a. natural selection b. sexual selection c. coevolution d. natural selection and coevolution
Which is a likely result of a mass extinction?
a. create “empty niche space” that can stimulate radiation of surviving groups b. eliminate non-beneficial alleles from gene pools c. increase the rate of new mutations d. decrease the rate of new mutations e. cause mutations that have greater than usual effect
Ventricular contraction normally begins at the apex (bottom of the heart). What would likely happen if ventricular contraction originated at the intersection of the atria and the ventricles instead?
A) Blood would be pumped through the semilunar valves. B) Blood would be pumped into the pulmonary artery and aorta. C) Blood would be pumped back into the atria. D) Blood would be pumped down to the apex of the heart.