This type of evidence for evolution allows scientists to study extinct organisms of the past
What is the fossil record/fossils?
100
This system consists of hair, skin and nails
What is the integumentary system?
100
These paired organs contain numerous tiny sacs where gas exchange occurs (oxygen and carbon dioxide)
What are the lungs?
200
Whales have a small pelvis and femur (thigh bone), despite the fact that they have no legs. These "leftover" structures are called this
What are vestigial structures?
200
The skeletal system consists of bones and this spongy bone-like tissue
What is cartilage?
200
The largest, most muscular chamber of the heart which pumps out oxygenated blood
What is the left ventricle?
300
Darwin's observations of different species of finches each suited to their particular island environment led him to the conclusion that these finches originated from this
What is a common ancestor?
300
Cardiac muscle is found in this organ
What is the heart?
300
This blood vessel carries blood from the heart to the lungs
What is the pulmonary artery?
400
Biological fitness is an organisms ability to do these two things
What are survive and reproduce?
400
These types of muscles, like the ones found in the digestive system, do not require actively thinking and work on their own
What is involuntary?
400
This blood vessel moves deoxygenated blood from the upper body back to the heart
What is the superior vena cava?
500
This was Darwin's proposed mechanism of evolution (how does it happen)
What is natural selection?
500
The adrenals, thyroid, and other organs that send messages through hormones are part of this system