Answer:
It necessary that the solar concentrators used by solar power plants be able to move throughout the day: To track the sun as it moves across the sky. The Brainliest Answer! Answer: improvement in a solar panel efficiency using a solar concentration by simple mirror and by cooling.
The variation may already exist within the population, but often the variation comes from a mutation, or a random change in an organism's genes.
Its either A or C. thats all i can say though but B and D you can rule out. I hope i helped a little
Answer:
Answer. The more an experiment is repeated, with the same outcomes, the more biased it becomes
Explanation:
A. objects made of crystals minerals water and air
Process of elimination-
there isn’t organic matter in rocks so D is out
they are made of minerals so B is out
some types of rock (pumice) have air bubbles in them so A is more likely than C
