Around 1914, ________ determined that DNA was an important component in ________ by using a staining technique that is still in use today.
Fill in the blank(s) with the appropriate word(s).
Robert Feulgen; chromosomes
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Which of the following is NOT common to all vertebrates?
a. a cerebellum b. a convoluted cerebrum c. a hindbrain d. a dorsal hollow spinal cord e. a midbrain
The blood-brain barrier does not
a. protect the brain and the spinal cord. b. select which substances can enter the cerebrospinal fluid. c. allow oxygen, carbon dioxide, and alcohol to pass from the blood to the cerebrospinal fluid. d. block glial cells from migrating to the spinal cord e. shield the brain from many changes in the blood
Animals that consume Brazil nuts derive nutrition mostly from tissue whose nuclei have how many chromosomes?
A) 17 B) 34 C) 51 D) 68
Which of the following can be learned from a computer-based (computation) analysis of the amino acid sequence of a membrane protein, which can be readily deducted from the nucleotide sequence of its isolated gene?
a) its structure b) both its structure and its orientation within the lipid bilayer c) its orientation within the lipid bilayer d) its population in each cell e) its color