3 week
There are five species of the Texas state flower the bluebonnet. Each flower is found in a different region of Texas and has slightly different traits. What most likely accounts for this variation?
Natural selection
Which of the following traits has occurred as a result of natural selection?
Over time, a population of white and dark colored mice become all white.
Migration can best enhance the survival of individuals because it
makes finding necessary resources more likely.
Variation in which characteristic would best help bison survive a harsh winter?
Fur thickness
A population of birds has many small variation among the individuals in the population. Variation in beak size among these birds would affect their survival most if the —
type of food available in the area changes.
Which of the following characteristics would help individuals in a population of giraffe outlive the other giraffes?
Having the longest necks
What internal feature do these penguins have that allow them to tolerate the cold temperatures of their environment?
A thick fat layer
Many of the early peacocks did not look like they do today. Their feathers were typically not as bright nor as large. Which of the following best explains the differences between early and modern peacocks?
Larger, brighter feathers were more attractive to mates, and therefore peacocks with smaller, duller feathers did not survive over time
What variation of an individual owl in an owl population would make the individual more likely to survive in an environment where the owl's prey is scarce?
Having better eyesight
These humps allow camels to live in dry climates for all of the following reasons EXCEPT —
They hold large sacs of stored water.
What is most likely responsible for the changes that occurred to animals in which it causes the differences?
The organisms' environments caused them to adapt, and natural selection diversified each species over time.