B is prey predator
C is parasitism
A is commensalism
Answer:
About 540 to 490 million years ago
Explanation:
The Cambrian is the first and oldest division of the Paleozoic era on the geologic time scale. The other periods in the Paleozoic are the ordovician, silurian, devonian, carboniferous and permian. At the permian a mass extinction occured.
The cambrian is marked with the evolution of lot of life and it is typified by the presence and dominance of trilobites.
As many as there are needed. you just can't have many independent variables
Answer:
<em>DNA does not act directly on other molecules instead lots of enzymes act on DNA and copy its Info</em>
Explanation:
Yes they do i done that myself just now