In a sandy beach community, ghost crabs and beach flies occur within
A) the supratidal zone.
B) the intertidal zone.
C) the subtidal zone.
D) any tidal zone.
A
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If an ecologist wants to determine the number of grass plants in a grassland, it is not realistic to actually count them all. Rather the researcher measures the number of individuals in several one-meter by one-meter square plots. What must they do next to estimate the total population size?
What will be an ideal response?
The sliding-filament model of muscle contraction is described by the action of ____ pulling ____ inward
a. muscle fibers; actin filaments b. myofilaments; sarcomeres c. sarcomeres; Z lines d. actin filaments; myosin filaments e. myosin filaments; actin filaments
How does the amount of atp resulting from fermentation compare to that of aerobic respiration?
a) aerobic respiration results in less energy b) aerobic respiration results in more energy c) each process results in equal amounts of energy
Which of the following is not a factor used directly in determining water potential of plant cells?
A. solute inside the cell B. solute outside the cell C. pressure at the cell wall-membrane interface D. temperature E. cell turgor pressure