What gland secretes fructose, which provides energy for sperm, into the seminal fluid?
a. prostate
b. seminal vesicles
c. bulbourethral
d. vas deferens
e. epididymus
b
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The ratio of toxic dose to therapeutic dose is called the
A. therapeutic index. B. phenol coefficient. C. susceptibility quotient. D. toxicity index.
One function performed by astrocytes is to:
a. form myelin sheaths b. induce synapse formation c. circulate cerebral spinal fluid d. phagocytize bacteria e. transmit action potentials
Beginning with the germination of a moss spore, what is the sequence of structures that develop after germination?
1. embryo 2. gametes 3. sporophyte 4. protonema 5. gametophore A) 4 ?1 ? 3 ? 5 ? 2 B) 4 ? 3 ? 5 ? 2 ? 1 C) 4 ? 5 ? 2 ? 1 ? 3 D) 3 ? 4 ? 5 ? 2 ? 1 E) 3 ? 1 ? 4 ? 5 ? 2
Which nitrogenous bases are considered purines?
a. thymine and cytosine b. adenine and cytosine c. thymine and adenine d. adenine and guanine