Density-independent factors:a
influence population size and are in turn influenced by changes in population density.
b. may be the result of intense interspecific competition.
c. are typically abiotic.
d. may include parasites.
e. may include diseases.
ANSWER: c
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The ?1 protein produced by the yeast MAT?? allele functions:
A. alone to repress ?-specific genes in haploid ? cells. B. with Mcm1 protein to repress ?-specific genes in haploid ? cells. C. with ?2 protein to repress haploid-specific genes in diploid cells. D. with a1 protein to repress ?-specific genes in diploid cells.
A particular type of common water snake is only found on islands in Lake Erie. This represents a
A. recessive trait. B. genetically distinct population. C. clone. D. hybrid.
The marine multicellular protists including the larger brown algae belong to the
A. euglenoids. B. Choanoflagellida. C. Stramenopiles. D. dinoflagellates. E. foraminifera.
Which of these muscle components is the smallest?
A) Muscle fiber B) Myofibril C) Myosin filament D) Skeletal muscle