The structure of the spinal cord and the brain are different in that:a
the spinal cord has only white matter, but the brain has both white and gray matter.
b. the spinal cord has gray matter outside, but the brain has gray matter inside.
c. the spinal cord has white matter outside, but the brain has white matter inside.
d. the spinal cord has both white and gray matter, but the brain has only gray matter.
e. Actually, the location of the gray and white matter is the same in both.
C
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An experimental test of the hypothesis to explain the origin of the first organic compounds on Earth might include all of the following sequential steps except
A. assembling an atmosphere with H2, CH4, NH3, and H2S. B. placing this atmosphere over liquid water. C. inoculating with a few bacteria to get the process started. D. increasing the temperature of the gases. E. providing energy with electrical spark discharges.
Describe the difficulty in distinguishing a cell in the late stages of prophase and the early stages of metaphase
What will be an ideal response?
Which of the following proteins is not necessarily
associated with the plasma membrane? a. recognition protein b. plasma protein c. receptor protein d. channel transport protein e. adhesion protein
A taproot system originates from an enlarging:a
adventitious root. b. lateral root. c. root cap. d. root hair. e. radicle.