Answer:
Respiratory system
Explanation:
Like other fishes, sharks extract oxygen from water as it passes over their gills.
Explanation:
Invading infectious diseases can, in theory, lead to the extinction of host populations, particularly if reservoir species are present or if disease transmission is frequency-dependent.
Answer: The sun
Explanation:
Plants use the sun to create their food through the process of photosynthesis
Undergo differentiation
become stem cells
turn on all of the genes found in the nucleus
some cells can undergo cell division
If your car is changing speed by accelerating or decelerating, or changing directions by turning or hitting a bump, your body can sense these accelerations. You might be pressed against the back of your seat while speeding up or against the car door as you turn for example. If you are cruising at a constant speed, with no changes in speed or direction, you wouldn't be able to feel it. You would need to use your other senses. You could see the scenery going by through the windows, with closer objects moving by more quickly than objects in the distance. You could also hear sounds like the wind rushing by and the hum of the tires rolling on the highway.
