What two recurring events in earth's history have an impact on the carbon cycle?

This is collection of data made by comparing objects in standard units. in science, the units are metric.

Why does sexual reproduction increase the genetic variation in a species? a. sexual reproduction doubles the chromosome number. b. sexual reproduction produces organisms with no dna. c. the gametes in sexual reproduction are exact clones of the parents. d. a fertilized egg has a mixture of alleles from the two parents.

What is not considered a benefit of genetically modified food production? a) faster and more efficient methods of producing hybrids b) introduction of the terminator gene c) the transfer of genetic properties from widely divergent life forms d) the method associated with insect-free crop production