Chapter 15

Question 1

Theory

Answer 1

Well-supported testable explanation of phenomena that have occurred in the natural world

Question 2

Darwin

Answer 2

Darwin made observations and collected evidence that made him propose a revolutionary hypothesis about the way life changes over time.

Question 3

Fossils

Answer 3

The remains of ancient organisms

Question 4

Key

Answer 4

Darwin observed that the characteristics of many animals and plants varied noticeably among the different islands of the Galapagos.

Question 5

Artificial selection

Answer 5

Nature provided the variation and humans selected those variations that they found useful

Question 6

Struggle for existence

Answer 6

That members of each species compete regularly to obtain food, living space , and other necessities of life

Question 7

Fitness adaptation

Answer 7

Any inherited characteristics that increases an organisms chance of survival

Question 8

Survival of the fittest

Answer 8

Ind that are better suited to their environment and survived and reproduced successfully

Question 9

Natural selection

Answer 9

Another word for survival of the fittest

Question 10

Decent of modification

Answer 10

Each living species has descended, w Changes, from other species over time

Question 11

Homologous structure

Answer 11

Structures that have different mature forms but develop from the same embryonic tissues

Question 12

Vestigial organs

Answer 12

Organs that serve little or no function

Question 13

Evolution

Answer 13

Change over time and the process by which modern organisms have descended from ancient organisms