The epididymis connects the
A) prostate and the urethra.
B) vas deferens and the urethra.
C) seminiferous tubules and the urethra.
D) vas deferens and the seminal vesicles.
E) testis and the vas deferens.
E
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The oldest known megafossils of early vascular plants may be characterized as:
a. possessing dichotomously branched stems with leaves. b. possessing dichotomously branched stems without leaves or roots. c. possessing erect stems with megaphylls. d. possessing roots but lacking sporangia. e. lacking roots but possessing megaphylls.
What plant group has the largest number of living species?
A) Seedless vascular plants B) Cone-bearing plants C) Flowering plants D) Seedless, nonvascular plants
Dicyclohexylcarbodiimide (DCCD) is a chemical that disrupts the function of ATP synthase. Why will treatment with DCCD cause a cell to die?
A. The pH of the intermembrane space becomes too high (alkaline). B. The cell cannot form a proton gradient across the inner mitochondrial membrane. C. Protons cannot flow from the intermembrane space into the matrix. D. Glucose cannot be oxidized to form pyruvate. E. Electrons cannot travel down the electron transport chain.
Continuous cell lines
a) die out after only a few generations. b) are sometimes called immortal cell lines. c) are grown in embryonated eggs. d) are derived from bacteria.