Which of the following would be most attractive to a female hummingbird? A mate protecting a territory with
A) many predators.
B) many nectar feeding animals.
C) many nectar bearing flowers.
D) many other males.
C
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The refractory period of a neuronal plasma membrane is important because it ____
a. establishes the resting potential b. initiates an action potential c. ensures that the threshold potential will be reached d. ensures that an impulse will travel in a one-way direction e. resets the threshold potential
Referring to the illustration, how can there be two non-recombinant chromosomes and two recombinant chromosomes?
a. Recombination doubles the amount of chromosomes.
b. Crossing over results in mutations that create more genetic material.
c. Chromosomes during this stage are replicated with two matching sister chromatids.
d. These are chromosomes before fertilization so they are haploid.
How does crossing over increase genetic diversity?
A) Crossing over increases the different combinations of genes present in a gamete. B) Crossing over allows specific genes to travel together on one chromosome. C) Crossing over increases the incidence of mutations in genes. D) Crossing over prevents the inheritance of harmful mutations.
Of the 4 ATP produced outside the electron transport chain, 2 are produced by _____ and 2 by ______. The rest are produced by _____
Fill in the blank(s) with the appropriate word(s).