Mechanisms of Evolution

Question 1

Darwin proposed that

Answer 1

evolution occurs through a process called natural selection

Question 2

Natural selection

Answer 2

acts as a selector that favors certain traits that are beneficial for survival and reproduction

Question 3

Individuals with advantageous traits are more likely to

Answer 3

survive and reproduce, passing on their genes to the next generation

Question 4

There are three conditions for natural selection to occur

Answer 4

variation in traits, heritability of traits, and differential reproductive success

Question 5

Example of Natural Selection

Answer 5

Finches

Question 6

Darwin studied finches in the

Answer 6

Galapagos Islands

Question 7

Originally, the finches had different

Answer 7

beak sizes that were suited for different types of food

Question 8

On an island with large nuts

Answer 8

finches with larger beaks were able to crack open the nuts and survive

Question 9

Over time, the finches with smaller beaks

Answer 9

died out as they were unable to find enough food

Question 10

development of finches with

Answer 10

smaller beaks that could eat smaller nuts

Question 11

finches adapted their beak sizes based

Answer 11

the available food sources.

Question 12

peacocks are an example of

Answer 12

natural selection

Question 13

Female peacocks choose mates based on

Answer 13

the brightness of their feathers

Question 14

Males with brighter feathers are more likely

Answer 14

to attract mates and reproduce

Question 15

The genes for bright feathers are passed down to the offspring, increasing their chances

Answer 15

of survival and reproduction

Question 16

Peacocks with brighter feathers have a better chance

Answer 16

of finding food and passing down their genes