Answer:
The correct answer is B. DNA replication is semiconservative.
Explanation:
With this experiment, Messelson and Stahl determined that there was a pattern in replication that left one original strand and added a new one in each case. Therefore, after two rounds, there will be two copies with "original" information exclusively and two copies with mixed strands or hybrids.
Answer: It absorbs light.
Explanation: Chlorophyll is a pigment inside of all trees and plants. Plants absorb light, if the chlorophyll is green, then it will change the plant, and make it look green. It can change depending on the day, and temperature. If it is fall, the leaves cannot eat, and change to red. If the temperature is normal, say 90 degrees, the leaves are healthy, and eat. This helps them stay green.
Answer:
when the producers(plants) absorbs nitrogen compounds from soil and use then to make proteins.