Among human males, both semen and urine normally travel along the _____
A) vas deferens
B) seminal vesicle
C) urethra
D) ureter
C
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On what basis can cellular slime moulds be distinguished from plasmodial slime moulds?
a. reproductive structures b. spore formation c. food requirements d. nuclei per cell
Much of what is known about the history of the origin of life came from:
a. written history. b. word of mouth. c. educated guesses. d. the study of fossils. e. None of the above; nothing is known about the history of the origin of life.
In the reaction A ? B + C + heat
A) there is a net input of energy. B) the potential energy of the products is greater than that of the reactant. C) the potential energy of the products is less than that of the reactant. D) entropy has decreased.
Which of the following statements about the effects of deforestation on terrestrial ecosystems are true? Check all that apply.
_____ At present rates of deforestation, it is predicted that all of the world's tropical rain forests will be degraded or gone within 10 years. _____ Today, deforestation is one of the greatest problems facing terrestrial ecosystems. _____ Deforestation usually leads to the over-accumulation of nutrients such as nitrates/nitrites in the soil. _____ Deforestation can lead to loss of topsoil. _____ Deforestation can lead to eutrophication of aquatic ecosystems.