Although all genetic diversity originates as a mutation there are two mechanisms that occur during meiosis that can recombine existing genetic diversity into many trillion of new combinations what are these two mechanisms a. organization of DNA around histone molecules b. variability in the arrangement of Acton and meiosis molecules in the meiotic spindle c. Random assortment of alleles during metaphase one of meiosis d. telomeric shortening after successive rounds of cellular division e. Crossing over between homologous sister chromatids

Dr. kaylan is an ecologist who studies bird behavior. she sets up an experiment to test which type of food crows are most likely to eat when given a choice between walnuts, corn, and sunflower seeds. to perform her experiment, dr. kaylan places three food bins in an area frequented by cows. each bin contains one of the three food types. then, she measures how much of each food type is eaten every day for a month and summarizes the results of her experiment in the pie chart below. based on her results, dr. kaylan concludes that crows choose to eat corn more frequently than other food sources because it has a higher nutritional value. what is a reasonable alternate conclusion that can be drawn from dr. kaylan's data

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.

How are fossils most commonly formed