Possible long and short answer

Question 1

What are the characteristics of arteries?

Answer 1

• Blood moves away from heart
• Blood travels in spurts
• Has no valves
• Thick muscle walls
• Lots of oxygen, not much Carbon Dioxide
• Bright red in color
• High pressure

Question 2

What are the functions of the spinal cord?

Answer 2

-It forms a 2 way conduction system between the brain and peripheral nerves
- it controls “reflex” actions that do not require supervision by the brain
ex: changing pupil size
responding to danger

Question 3

What are the points of natural selection?

Answer 3

• variation within populations
• variations are favorable
• More young are produced than can survive
• The survivors reproduce with favorable characteristics
• Over enormous spans of time, small changes accumulate and populations change

Question 4

How does a bacteria become drug resistant?

Answer 4

• variation in the bacterial population, some are resistant to certain types of meds
• resistant ones have the favorable traits
• resistant ones stay alive, passing on genes to offspring
• the population will evolve to be drug resistant

Question 5

How does a bacteria become drug resistant?

Answer 5

• variation in the bacterial population, some are resistant to certain types of meds
• resistant ones have the favorable traits
• resistant ones stay alive, passing on genes to offspring
• the population will evolve to be drug resistant

Question 6

Tie the different systems together

Answer 6

• bone marrow inside bones create red blood cells
• rib cage protects heart
• tendon links bone to muscle
• heart pumps blood to different parts of the body, blood travels from heart to the lungs, where the respiratory system supplies blood with oxygen. you inhale air through your nose or mouth, it psses through your pharynx, larynx, trachea and to your lungs, where it diffuses blood through the alveoli