Assuming codominance, if a homozygous red-flowered plant is crossed with a homozygous white-flowered plant, what will be the color of the offspring?
A) Red
B) White
C) Pink
D) Red and white
D
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How do myelin sheaths increase the speed with which action potentials are propagated along an axon?
A) They increase the permeability of Na+ ions in the plasma membrane. B) They amplify the action potential by increasing sodium influx along the entire distance of the neuron. C) They cause action potentials to "jump" down the axon rather than travel in a continuous path along every site on the axon.
A horseshoe crab uses its long extended spine for what purpose?
a. defending its territory b. digging for clams c. fighting for mates d. protection from predators e. flipping itself right side up
In the 1940s, the population of whooping cranes in North America neared extinction, with fewer than 30 birds surviving. The population has since expanded to several hundred birds today
It is likely that these several hundred birds will exhibit very little genetic diversity. This is an example of A) biogeographical distribution. B) the bottleneck effect. C) random mutation. D) population effect. E) immigration.
Which of the following contains indigestible fiber, mucus, and dead microorganisms that are eliminated from the body?
A) Ghrelin B) Pancreatic juice C) Bile D) Chyme E) Feces