B) Environmental Pressures
D) Natural Selection
B) Natural Selection
E) Environmental Pressure
A) The light moths will be captured by predators more easily than the dark moths, and the population of dark moths will rise.
B) The light moths will be captured by predators more easily than the dark moths, and the population of light moths will rise.
C) The light moths will change their wing color to match that of the dark moths.
D) The dark moths will be captured by predators more easily than the light moths, and the dark moths will probably go extinct.
E) None of the answers listed
A) There has been a drought in the area that is affecting all life forms.
B) All of the answers listed
C) The moths are living in an environment with light trees.
D) The population of natural predators of the moths has gotten smaller.
E) The moths are living in an environment with dark trees.
A) The moth populations shown here demonstrate random fluctuations over time that are not explained by tree color.
B) Small particles of tree bark became embedded in the moth’s wings, causing the moths to become darker on the dark trees and lighter on the light trees. These acquired traits were then passed down to the next generation of moths, causing the populations to change color over time.
C) The moths that were the same color as their background were more likely to survive and reproduce. Over time, the populations of these well-adapted moths increased.
D) On light trees, individual moths tried to become lighter in color to match the tree background. On dark trees, individual moths tried to become darker in color.
E) All of the answers listed
A) The green insect population will decrease and the yellow insect population will increase.
B) Both insect populations will remain constant over time.
C) Both insect populations will increase over time.
D) The green insect population will increase and the yellow insect population will decrease.
E) None of the answers listed
A) Over time, birds with better eyesight will become more common.
B) Birds may change hunting strategies or seek other sources of food.
C) All of the answers listed
D) None of the answer listed
E) Bird populations will decrease, at least for a while.
A) Over many generations, physical adaptations that are found to be helpful/ are passed on will become "normal" on organisms that survive. These traits get passed on, natural selection continues, and over time, based on traits that are helpful, this process changes how that species looks and acts.
B) Biological Evolution does not work through natural selection but rather on whole new species being born all at once.
C) Biological Evolution only changes organisms that die off.
D) Natural Selection only works over a few years and a species can't change all that much.
E) None of the answers....and none of your business. OK, this one is not the answer.
A) Iguanas that were larger were able to out compete the smaller iguanas for what remained of the food.
B) Iguanas taste like chicken. This is not the answer but it's what I've been told. This is not the answer by the way. So please don't choose it.
C) Iguanas that were smaller died off before larger iguanas because they couldn't compete with them for food.
D) The warming waters and decreased food supply were environmental pressures that favored smaller iguanas who needed less food.
E) The warming waters and decreased food supply were environmental pressures that caused the iguanas to migrate to other places where the water wasn't as warm.
A) The trend was that sad bear and happy bear populations increased at the same rate over time.
B) When only one trait in a population of Teddy Grahams is considered to be delicious, the population of that type of bear tends to grown more slowly or decreases over time while the other populations that are not as "tasty" increase at a higher rate over time.
C) Because sad bears were better tasting than the happy bears, the population of the sad bears went down while the bad tasting happy bears went up.
D) Mr. Niese may have once eaten an entire box of Teddy Grahams in one sitting. This is true but don't choose this answer.
E) Both Happy Bears and Sad Bears increased their populations at the same rate over time in most groups.