About 99% of the solid Earth is made up of A.
about half of the known elements.
B.
a small fraction of the known elements.
C.
just one of the known elements.
D.
most of the known elements.

Provide one reason why mitosis occurs.

What is the answer for the complicated molecules that make up living things usually contain carbon. why is carbon so important in these molecules?

What can be said about farmers in highly developed countries? a) they have little or no negative impact on the environment. b) they practice subsistence agriculture. c) they are able to incorporate polyculture into their farming practices. d) they utilize organic farming techniques on a regular basis. e) they rely on large amounts of energy from fossil fuels.