Answer:
a 80% b50% ctwo billionths one one- hundredth
D. The cytoplasm slides and forms a pseudopodium in front to move the cell forwards.
During exercise there is an increase in physical activity and muscle cells respire more than they do when the body is at rest. The heart rate increases during exercise. The rate and depth of breathing increases - this makes sure that more oxygen is absorbed into the blood, and more carbon dioxide is removed from it.
According to the Doppler effect, the sound of a police car siren is louder and high pitched as it approaches the observer.
Hi!
Magnetic force is a non-contact force.
