zoology
Zoology Connect Quizzes
Chapter1
Your friend releases a pair of goldfish from an aquarium into a pond. The fish survive long enough to produce many young. Returning to the pond after several years, you find that only drab olive-brown offspring remain from the original brightly colored golden parents. Select any factors listed below that would have promoted the survival of olive-brown fish over the brightly colored variety.
The fish in the wild spent most of their energy finding food and did not get enough calories to produce color.
The somewhat muddy water found in the pond covered the scales, eventually making the scales become less colorful.
The predators in the pond were mostly largemouth bass, which depend heavily on their
→
good color vision to find prey.
Although only olive-brown offspring are found, the original parents produced hundreds of gold, red, white and olive-brown offspring among the brown rocky and weedy
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shallows of the pond.
The largemouth bass serve as a selector, picking out prey that are most visible and obvious.
Natural selection implies that there is variety and that some of the forms are more adapted than others. In this case, the variety is color of goldfish offspring and the drab colored fish proved to be more successful in producing young (because they survive to adulthood). If there was no color variation, or if a predator that tended to pick the brightly colored fish was absent, then there would be no natural selection pressure driving the species towards more drab colors.
Which of the following facts is least useful to a taxonomist trying to place animals in the same genus? Animals with shared ancestors have more DNA in common than animals that do not share ancestors.
DNA contains the genetic instructions that guide the formation of traits in an animal.
Environmental factors, such as diet or social status may cause one animal to behave or look quite different from another.
An animal receives its DNA
Chapter1
Your friend releases a pair of goldfish from an aquarium into a pond. The fish survive long enough to produce many young. Returning to the pond after several years, you find that only drab olive-brown offspring remain from the original brightly colored golden parents. Select any factors listed below that would have promoted the survival of olive-brown fish over the brightly colored variety.
The fish in the wild spent most of their energy finding food and did not get enough calories to produce color.
The somewhat muddy water found in the pond covered the scales, eventually making the scales become less colorful.
The predators in the pond were mostly largemouth bass, which depend heavily on their
→
good color vision to find prey.
Although only olive-brown offspring are found, the original parents produced hundreds of gold, red, white and olive-brown offspring among the brown rocky and weedy
→
shallows of the pond.
The largemouth bass serve as a selector, picking out prey that are most visible and obvious.
Natural selection implies that there is variety and that some of the forms are more adapted than others. In this case, the variety is color of goldfish offspring and the drab colored fish proved to be more successful in producing young (because they survive to adulthood). If there was no color variation, or if a predator that tended to pick the brightly colored fish was absent, then there would be no natural selection pressure driving the species towards more drab colors.
Which of the following facts is least useful to a taxonomist trying to place animals in the same genus? Animals with shared ancestors have more DNA in common than animals that do not share ancestors.
DNA contains the genetic instructions that guide the formation of traits in an animal.
Environmental factors, such as diet or social status may cause one animal to behave or look quite different from another.
An animal receives its DNA