Genetic variations may result from which of the following? choose all that apply.

question 1 options:

genetic recombination during meiosis.

errors occuring during dna replication.

mitosis producing 2 identical daughter cells.

cell differentiation, which leads to genetic variation.

mutations caused by environmental factors.

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

What does the splanchnic nerve innervate?

According to the rna world hypothesis, rna acted as the genetic material and catalyzed reactions in ancient cells. what conclusion can you draw from this?               a.  this implies that dna and proteins aren't essential in cells today.    b.  this implies that rna can catalyze any chemical reaction that enzymes catalyze.    c.  this implies that if a cell has a problem with its dna, its rna can compensate for the damaged dna.    d.  this implies that dna and proteins evolved after rna.