Human population began to rise rapidly following the
A) Industrial Revolution.
B) end of World War I.
C) period known as the Black Death.
D) end of the 20th century.
E) end of the Ice Age.
A
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Eusocial animals are those that ________
a. live together for generations and have a reproductive division of labor b. typically display altruistic behavior c. nest in colonies but live separately the rest of the year d. associate with others of their species only for breeding
Facilitated diffusion is an important method for cells in obtaining necessary molecules and removing other ones. Requirements for facilitated diffusion include
A. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always against the concentration gradient, never with the gradient. B. The carrier molecule must be specific to the molecule that is transported and an ATP molecule must be attached to the specific carrier. The direction of movement is always against the concentration gradient, never with the gradient. C. The carrier molecule is nonspecific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient. D. The carrier molecule must be specific to the molecule that is transported. The direction of movement is always with the concentration gradient, never against the gradient.
Which class of hormones produced in the roots of plants promotes cell division and growth and retards the aging of flowers and leaves?
A) gibberellins B) phytochromes C) cytokinins D) ethylene
A(n) ________ assay is used for rapid identification of strep (group A Streptococcus) infections.
A. direct fluorescent antibody B. immunodiffusion precipitation C. viral neutralization D. immunochromatographic E. immunoblot