The resting potential of an unstimulated neuron is between ________ millivolts (mV)
A) ?40 and ?90
B) ?4 and ?9
C) 40 and 90
D) 4 and 9
E) ?400 and ?900
A
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You are bitten by a mosquito that carries Plasmodium. Decide whether each statement is true or false
______ Histamine is released at the site of the bite and swelling occurs. ______ There is no response because single-cell eukaryotes have no effect on humans. ______ Cytotoxic T cells recognize and kill Plasmodium. ______ The complement system will lyse the infected cells. ______ There will be a strong secondary response since everyone is vaccinated for malaria at birth. What will be an ideal response?
Which of the following best describes Mendel’s hybridizations?
a. the mating of two true-breeding individuals that have similar forms of the trait of interest b. the mating of two true-breeding individuals that have different forms of the trait of interest c. the mating of offspring back to one or both of their parents d. the mating of dominant-expressing organisms with homozygous recessive organisms
The membrane studded with photosynthetic pigments in plant cells is the
A. chlorophyll. B. granum. C. chloroplast. D. thylakoid. E. stroma.
The definition of phenotypic plasticity is when a single genotype may produce different phenotypes in response to environmental stimuli
a. true b. false