Answer: The answer is rock.
Explanation: A rock is a a solid substance in which it is composed of large quantities of one mineral, or contains 2 or more minerals.
Answer:At medium temperatures, between 50 and 68 degrees Fahrenheit, or 10 and 20 degrees Celsius, the photosynthetic enzymes work at their optimum levels, so photosynthesis rates gauge high. Depending on the particular plant in question, set the greenhouse thermostat to a temperature within this range for best results.
Explanation:
Solar power is expensive and requires a large amount of space. I just got it right on my test
Genetic variation allows many different traits, and allows the choice of using one trait while not using another, which allows some to survive, and others to die. Without it, if there is a disease, the whole population would be wiped out
