What factors in earth's relationship to the sun make life on earth possible?

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.

Crossing over and independent assortment are important activities that occur during meiosis. what is the significance of these activities

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.