All photoreceptors ________
a. are found in eyes
b. convert photon energy to visual images
c. are found in vertebrates
d. convert photon energy to sensory neuron excitation
d
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When erythrocytes are in the capillaries of body tissues, CO2 diffuses ________ and is converted to ________
Fill in the blank with correct word.
Given that an unknown atom's mass number (AMU) is 27, its combination of particles could be
A. 27 electrons, 16 neutrons, 16 protons. B. 27 neutrons, 27 protons, 27 electrons. C. 15 neutrons, 12 electrons, 15 protons. D. 16 electrons, 11 neutrons, 16 protons.
The alternation of circular muscle contraction and longitudinal muscle contraction allows the earthworm to move forward. What type of support system aids locomotion in the earthworm?
A. an endoskeleton B. a hydrostatic skeleton C. a calcium carbonate shell D. an exoskeleton
Cellular membranes are
A. solely composed of lipids. B. composed of a single layer of amphipathic molecules. C. found in eukaryotes, but not prokaryotes. D. fluid. E. selective to the transport of gases and small molecules only.