Which of the following statements reflects a key concept about ecosystems?
a. Matter moves linearly through different systems, both abiotic and biotic, within an
ecosystem.
b. There is a one-way flow of energy through the food webs of ecosystems.
c. Conservation should focus on the success and survival of individual species.
d. The abiotic environment does not influence the distribution and survival of particular
organisms.
e. Heat energy can be used by organisms for their daily activities
B
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A cross is done between parents with genotypes aaBbCc and aaBbcc. What is the probability that
offspring will have the same genotype as the first parent?
a. 1/8 b. 1/4 c. 3/8 d. 3/16 e. 9/16
What is the association between tropomyosin and troponin molecules in resting striated muscle fibers?
A. Tropomyosin holds the troponin in place on the myosin. B. Troponin holds the tropomyosin in place on the myosin. C. Tropomyosin holds the troponin in place on the actin. D. Troponin holds the tropomyosin in place on the actin. E. There is no known association.
Which type of papillae contains the most taste buds?
a. filiform b. fungiform c. foliate d. circumvallate
A permanent, inheritable change in the genetic information is called ________.
A. an alteration B. translation C. a mutation D. regeneration E. transcription