Because when the DNA replication occurs, it will first uncoiling. And each strand will be a template for replicating. So the new DNA will have one strand from the origin DNA and one strand from newly synthesis. That's the reason of semi-conservation.
Answer:
C
Explanation:
With continental drift separating Pangea, we know that A and D must be false because they are farther apart today not closer. Between answer choices B and C, many of the species shown appear to have inhabited Antartica, and hardly anything lives there today. This leaves C as the most logical answer.
Explanation:
The carrying capacity means the highest number of animals of a population a place can contain by providing them with necessary food .
Farm mechanization refers to the use of agricultural machines to take the place of manual labor on farms.
Answer:
2. High
3. Low
Explanation:
4. Sinking air compresses and heats. As air sinks, air pressure at the surface is raised.
3. As air rises, air pressure at the surface is lowered