Coastal upwelling is a common source of nutrients in the open ocean
Indicate whether the statement is true or false
F
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The pattern of gene transfer from Hfr to F- cells ____
a. occurs with genes furthest from the F factor being transferred first
b. can be used to map chromosomal genes in the F- cell c. was used to map the E. coli chromosome d. cannot be used to indicate the relative positions of genes within the Hfr cell e. is random because the F factor moves between different positions in the chromosome
Fast and ____________________ muscle fibers contract rapidly but do not produce sustained contractions, whereas slow and ____________________ muscle fibers contract slowly but can produce energy for long periods of time via aerobic respiration
Fill in the blank(s) with correct word
Which of the following statements is (are) true?
a. All action potentials transmitted by the same neuron are alike. b. The brain assesses a stimulus in part by which neuron pathways are active. c. Different neurons convey different information by transmitting impulses to different areas of the brain. d. A strong stimulus recruits more receptors than does a weak stimulus. e. All of these are true.
The most commonly occurring mutation in people with cystic fibrosis is a deletion of a single codon. This results in _____
A) a base-pair substitution B) a frameshift mutation C) a polypeptide missing an amino acid D) a nonsense mutation