In a rank-abundance curve comparing two communities, the community with the greater species richness is characterized by a
A) lesser length of the curve and a more gradual slope.
B) lesser length of the curve and a steeper slope.
C) greater length of the curve and a more gradual slope.
D) greater length of the curve and a steeper slope.
C
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Choose the option that best describes the relationship between the cell wall thickness of parenchyma cells versus sclerenchyma cells
A) The cell walls of parenchyma cells are thinner than those of sclerenchyma cells. B) The cell walls of parenchyma cells are thicker than those of sclerenchyma cells. C) The thickness of the cell walls for both types of cells is roughly equal. D) The thickness of the cell walls for both types of cells is too variable for a comparison to be made.
Long, slender, helically curved, gram-negative bacilli with tight coils are identified as belonging to which species?
a. Treponema b. Leptospira c. Borrelia d. Coxiella
What is the force that drives continental drift?
a. Subduction zones b. Seafloor spreading c. Fraction zones d. Magma convection
Which part of the amphibian life cycle prevents them from being fully terrestrial?
a. finding a mate b. reproduction c. respiration d. obtaining food e. locomotion