Natural selection involves changes in the genetic makeup of a population over a period of time. The random change of DNA from parent to offspring, called mutations, can help produce variations in offspring. Some
mutations can be helpful, while others can be harmful. In this experiment, students modeled random mutations.
Data was collected to determine if the mutations were helpful or harmful when trying to collect and eat food.
Imagine climate change causes an increase in global temperature, polar ice melts, and sea levels on Earth rise. The
organisms in this study live in a coastal marsh. Global warming has caused flooding and the once marshy habitat is
underwater. Compare and contrast the traits of each group. Which group would most likely survive and reproduce in
this new habitat?
A)
Group A
B)
Group B
Group E
D)
Group H

Two male mice, which we will call male a and male b, are both phenotypically normal. male a was from a litter that contained half phenotypically normal mice and half dwarf mice. the mother of male a was known to be homozygous for the normal igf2 allele. male b was from a litter of eight mice that were all phenotypically normal. the parents of male b were a phenotypically normal male and a dwarf female. male a and male b were put into a cage with two female mice that we will call female a and female b. female a is a dwarf and female b is phenotypically normal. the parents of these two females were unknown, although it was known that they were from the same litter. the mice were allowed to mate with each other, and the following data were obtained: female a gave birth to three dwarf babies and four normal babies. female b gave birth to four normal babies and two dwarf babies. which male(s)mated with female a and female b? male a with both females male a with female b, and male b with female a male a with female a, and male b with female b could not be determined male b with both females

Which image shows labeled organelles that are present only in plant cells?

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above