In a certain population of lizards, individuals can have either short, medium, or long hindlimbs.
At some point in time, the lizard population experienced a change in its environment. This change led to a shift in the number of individuals with different hindlimb lengths in the population.
The table below shows the percentage of lizards with short, medium, and long hindlimbs both before, and multiple years after, the environmental change.
Before environmental change After environmental change
Short hindlimbs
Medium hindlimbs
Long hindlimbs
Which trait was most likely to help lizards survive and reproduce after the environmental change?
Choose 1 answer:
Choose 1 answer:
(Choice A) short hindlimbs
A
short hindlimbs
(Choice B) medium hindlimbs
B
medium hindlimbs
(Choice C) long hindlimbs
C
long hindlimbs
C) long hindlimbs
Since the environment changed and likely presented new challenges or opportunities that required better adaptation for survival and reproduction, individuals with long hindlimbs may have had an advantage in this new environment. Long hindlimbs could allow for better mobility, agility, and access to food or mates, making them the most likely trait to help lizards survive and reproduce after the environmental change.
In a population of plants, individuals can have either red or blue flowers. Red flowers tend to be pollinated by hummingbirds. Blue flowers tend to be pollinated by bees.
A plant with red flowers.
A plant with red flowers.
a plant with red flowers
A plant with blue flowers.
A plant with blue flowers.
a plant with blue flowers
Over time, a virus causes the number of bees in the plants’ environment to go down, until there are almost no bees left.
How is the plant population likely to change as a result of the loss of bees?
Choose 1 answer:
Choose 1 answer:
(Choice A) Red-flowered plants will become less common.
A
Red-flowered plants will become less common.
(Choice B) Blue-flowered plants will become less common.
B
Blue-flowered plants will become less common.
A) Red-flowered plants will become less common.
Since red flowers are pollinated by hummingbirds and not affected by the loss of bees, they are likely to have a reproductive advantage over the blue-flowered plants. As a result, red-flowered plants are likely to become more common in the population as bees decline.