Which of the following would use an alternation of generation life cycle?
a. fungi
b. animals
c. plants
d. bacteria
c. plants
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When yeast cells of opposite mating types are in close proximity, cell changes occur inside those cells that result in the polymerization of actin filaments, allowing the yeast cells to mate
Those changes in cell behavior are initially due to signaling molecules (pheromones) released by the yeast cells. Pheromones are A) a type of steroid hormone that diffuses through the plasma membrane causing cytoplasmic actin proteins to form filaments B) a type of hormone that binds cell surface receptors causing cytoplasmic actin proteins to form filaments C) signaling molecules that bind cell surface receptors causing yeast cells to become motile, insuring mating success D) signaling molecules that cause the extracellular matrix of yeast cells to thicken in preparation for cell fusion E) signaling molecules that cause intracellular G proteins to be inhibited
On a regional level, coastal areas generally experience ____ fluctuations in temperature compared to interior regions
of landmasses.
a. smaller daily but larger seasonal b. larger daily but smaller seasonal c. only larger daily d. smaller daily and seasonal e. larger daily and seasonal
Competitive inhibition of enzymes occurs
A. when a substance other than the substrate binds at the active site of an enzyme. B. when the product, or other substances, instead of the reactant, bind to the active site of the enzyme. C. when a substance binds to an enzyme at a site away from the active site. D. by blocking the production of an enzyme. E. when the product, instead of the reactant, of a reaction binds to the active site.
Parapatric speciation occurs most often ____
a. within in the same home range b. populations inhabiting different areas while maintaining contact along a common border c. within a group of interbreeding populations d. on either side of geographic barriers e. by polyploidy