Direct current is produced by batteries, fuel cells, rectifiers, and generators with commutators
Ash can be harmful to an environment. It mostly depends on how much ash there is though. If a volcano erupted such as Mt. St. Helen's then yes that can harm an environment. Ash can cover the sky and block out the sun for days before disappearing and that will affect the life of plants
Answer:
I believe the answer is b but I'm not 100% sure
Explanation:
The are 4 glands in the endocrine system. The thyroid gland, pineal gland, parathyroid gland, and the pituitary gland.
The number of camouflaged guppies will increase while the number of uncamouflaged guppies will decrease. Since uncamouflaged guppies are easy to be noticed, predators will eat them. So their number must decrease. On the other hand, camouflaged guppies will remain hidden and their number will increase since they will mate each other.
