We do science because if we didn't we would not know a lot of the things we do know now.
Answer:
Tachycardia
Explanation:
Bonus:
It's an abnormally fast heart rate.
Symptoms to watch out for are dizziness, weakness, and heart beat (the heart may beat more than 160 times per minute).
They are usually caused by a disruption in the heart's electrical system.
Answer:
Mass extinction occur when the environment is not favourable.
Explanation:
Mass extinctions occur on the earth when there is sudden change in the environmental conditions for an organisms that is not good for the survival of that particular organisms so they extinct from the earth surface. The example of mass extinctions are dinosaurs. These dinosaurs were extinct due to change in their environment that decreases the availability of food for them so due to no available food, the dinosaur extinct from the earth.
A negative tropism is when a plant grows away from stimulus
