Sea anemones have a(n) __________ that causes
them to extend into a feeding position when
longitudinal cells __________ and radial cells
__________.
a. hydrostatic skeleton; contract; relax
b. endoskeleton; contract; relax
c. exoskeleton; contract; relax
d. hydrostatic skeleton; relax; contract
e. exoskeleton; relax; contract
Answer: d
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Solutes move from a ____concentration to a ____ concentration during active transport.
a. high; low b. low; high c. high; equilibrium d. low; equilibrium
Water's density and, consequently, its buoyancy decrease at warmer temperatures. Considering the impact of temperature, and the table above, in which environment should diatoms sinking be slowest?
A) cold fresh water B) warm fresh water C) cold seawater D) warm seawater
All protein building occurs through two principal steps, which are
A single-ring nitrogenous base found in DNA and RNA
What will be an ideal response?