7th grade CA7 Review

What would most likely help a dark-colored beetle to survive and reproduce more than a light-colored beetle in a muddy wetland?

• Dark-colored beetles were covered in mud and were no longer threatened by predators.

• Dark-colored beetles were able to use the mud to make a chemical that was poisonous to predators.

• Dark-colored beetles were faster than light-colored beetles and could escape predators.

• Dark-colored beetles were able to blend into the dark background and were not as easily seen by predators.

What adaptation would help predators attack their prey in areas with tall grass?

• long legs

• long fur

• small nose

• spotted fur

Why would the color of a fox's coat change each season?

• genetic mutation

• learned behavior

• behavioral adaptation

• physical adaptation

Why are there more tuskless elephants now than ever before?

• Fewer elephants with tusks survived to reproduce.

• The gene for tusks became recessive.

• The hunting of elephants resulted in genetic mutation of tusk gene.

• Elephants have lost their tusks because of climate change.

Which is an example of migration?

• Cardinals get new feathers twice a year.

• Ducks fly to a new location twice a year.

• Chipmunks have babies twice a year.

• Mountain goats change the color of their fur twice a year.

A camel can store extra water in it's cells. This adaptation would be advantageous in a climate that is ______________.

• cold and wet

• hot and dry

• sunny and warm

• windy and rainy

Natural selection is named as such because_____________.

• environmental conditions "select" organisms with adapted traits to survive and reproduce.

• organisms "select" the best environmental conditions to live and reproduce.

• organisms "select" a mate with the best possible combination of genes.

• nature "selects" the best environmental conditions for organisms living in an ecosystem.

If a species does not have traits that are suited to a change in environment, what will happen to the organism?

• It will survive and reproduce.

• It will become extinct.

• It will change because of natural selection.

• It will evolve better traits.

When does selective breeding happen?

• When humans select individual to mate based on genetic traits.

• When nature selects the most adapted to survive.

• When animals select a mate, rather than randomly mating.

• When animals select the traits that they need to survive.

What is an example of an organism that has been selectively bred for a particular trait?

• cats that eat mice

• horses that eat grass

• goats from large herds

• chickens that lay large eggs