Molting in arthropods may involve a change in
all but
a. body form and maturity.
b. sex.
c. body size.
d. eating habits.
e. sensory structures.
B
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Both Charles Darwin and Alfred Russel Wallace acknowledged the influence of the economist Thomas Malthus in the development of their ideas about natural selection. Specifically, Malthus' ideas about geometric population growth implied that:
A. resources in every generation would be limited, so individuals in every generation would have to compete for those resources. B. only the largest and strongest individuals would survive. C. organisms should have as many offspring as possible. D. organisms should have a few, very fit offspring who can compete for scarce resources. E. all of the answer options are correct.
Water draining from the land mixes with
seawater carried in on tides in which of the following? a. upper littoral b. midlittoral c. lower littoral d. estuary e. upwellings
Osmotic pressure of a solution is the amount of pressure exerted on the side of the selectively
permeable containing a higher concentration of solute to prevent diffusion of solute. __________________ Indicate whether the statement is true or false.
The lateral movement of transmembrane proteins can be restricted by several different mechanisms. Which mechanism best describes the process by which an antigen-presenting cell triggers an adaptive immune response?
(a) proteins are tethered to the cell cortex (b) proteins are tethered to the extracellular matrix (c) proteins are tethered to the proteins on the surface of another cell (d) protein movement is limited by the presence of a diffusion barrier