Suppose farmers want to create a new form of potato that is more nutritious than the kind sold in stores today. These farmers would MOST LIKELY choose(1 point)
Responses
one nutritious species of potato to breed.
one nutritious species of potato to breed.
two nutritious species of potatoes to breed.
two nutritious species of potatoes to breed.
three potato species with different nutrition levels to breed.
three potato species with different nutrition levels to breed.
one nutritious and one non-nutritious species of potato to breed.
three potato species with different nutrition levels to breed.
Suppose orange beetles and green beetles live in the same environment. Green beetles are harder to see on leaves, so birds eat primarily orange beetles. According to the theory of natural selection, in the future orange beetles will(1 point)
Responses
move to a place without green beetles.
move to a place without green beetles.
decrease in population until they possibly become extinct.
decrease in population until they possibly become extinct.
reproduce to their full potential until they increase in number.
reproduce to their full potential until they increase in number.
breed with green beetles until there are no longer orange beetles.
reproduce to their full potential until they increase in number.
Snowshoe hares have an interesting adaptation that helps protect them against predators. Depending on the season, their fur can be a different color. During the winter, snowshoe hares are white, which helps them blend in with the snow. When the seasons change to spring and summer, snowshoe hares turn a gray-brown. This color helps them camouflage with dirt and rocks. The hind legs of a snowshoe hare are large and have more fur and larger toes than those of other rabbits or hares. These adaptations provide additional surface area and support for walking on snow.
For many years most of the rabbits that lived in the cold, snowy countryside of Canada were white. Recently, scientists have noticed that many of the white rabbits in the countryside have been replaced by gray rabbits. What environmental change(s) could have contributed to the change in the rabbits' fur color over the last 150 years?
(1 point)
global cooling
global cooling
longer winters in the area
longer winters in the area
a warming climate and less snowfall
a warming climate and less snowfall
an increase in environmental pollution
an increase in environmental pollution
a warming climate and less snowfall
Notice the population of beetles. The allele for color is seen on their backs: green (g) and brown (G) alleles. Green beetles are homozygous, gg. Brown beetles are heterozygous Gg in this population sample. The beetles' habitat is an old growth forest, where they burrow into the trees' bark for food and shelter. The coloration of the beetles help them to hide from predators, such as birds.
Imagine this scenario. During the spring and summer the old growth forest has been plagued with wildfires. The ground litter as well as the leaves on the trees have been burned. Only very young trees are destroyed in the fire though; the old growth trees still stand. How would this impact the beetle population, if at all?
(1 point)
Responses
Since the leaf litter and small trees burned, we would expect a decline in the brown beetle population.
Since the leaf litter and small trees burned, we would expect a decline in the brown beetle population.
The wildfires destroyed all food sources for the beetles; we would expect to see a decline in both green and brown beetles.
The wildfires destroyed all food sources for the beetles; we would expect to see a decline in both green and brown beetles.
Due to the wildfires, the entire beetle population would decline because they would not longer be camouflaged from predators.
Due to the wildfires, the entire beetle population would decline because they would not longer be camouflaged from predators.
The leaves will be destroyed and the green beetle population would decline because they would no longer be camouflaged from predators.
Since the leaf litter and small trees burned, we would expect a decline in the brown beetle population.
Found on the Galapagos Islands there are several species finches, also known as Darwin's Finches. These finches share the same co-exist on the islands sharing the same habits and characteristics except for one; they all have different shaped and sized beaks. The differences in their beaks might be the most important aspect of their survival. Notice that for about ten years the populations of the two different finch species remained pretty stable largely because the two species had varied food sources. Then in 1977, there was a huge drop in finches with small beaks while there was a great increase in large-beaked birds. How can you explain this?
(1 point)
Responses
The small-beaked finches became prey for larger animals.
The small-beaked finches became prey for larger animals.
The large-beaked birds preyed on the small-beaked birds.
The large-beaked birds preyed on the small-beaked birds.
The available food changed, the small beaked birds could not readily adapt and they began to die out.
The available food changed, the small beaked birds could not readily adapt and they began to die out.
Competition for food favored the large beaks; the small beaked birds had little or nothing to eat and they died off.