Signal transmission is faster in myelinated axons because __________.
Fill in the blank(s) with the appropriate word(s).
Ans: the action potential can jump from node to node along the insulating myelin sheath
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A bacteriologist is studying two asexually reproducing strains of E. coli. The two require different amounts of trace minerals for survival; on these grounds, the bacteriologist determines that they are separate species
In making his determination, he is using which species concept or concepts? Select all that apply A. biological species concept B. ecological species concept C. morphospecies concept D. evolutionary species concept E. none of these
Which of the following human genetic disorders is caused by a dominant allele?
a. hemophilia b. sickle cell anemia c. cystic fibrosis d. Huntington's disease
Figure 40.7
Where does hormonal adjustment to solute and volume levels occur?
A. A B. B C. C D. D E. C and D
Recombinant DNA refers to the
A) study of bacterial ribosomes. B) study of the function of genes. C) interaction between human and bacterial cells. D) synthesis of proteins from genes. E) DNA resulting when genes from one organism are inserted into another organism.