The diagram to the right shows a phase of mitosis. Which of the following statements describes what is occurring in this phase? *
(1 Point)
a. The chromosomes are duplicating their DNA.
b. The copies of each chromosome are separating.
O c. The chromosomes are moving toward the center of the cell.
O d. The chromosomes are preparing for crossing over.
2

Bisphenol a (often called bpa) is a chemical found in products that people use every day, from water bottles to food containers to children's toys. unfortunately, bpa leaches out of its many products and makes its way into our bodies. what are the health effects of bpa exposure? ongoing research is finding that elevated exposure to bpa can affect a wide variety of developmental and physiological processes, but one of the first studies of bpa's health effects came about because of a simple mistake in the lab. at a laboratory at case western reserve university in 1998, geneticist patricia hunt was making a routine check of her female lab mice. as she extracted and examined developing eggs from the ovaries, she began to wonder what had gone wrong. she noticed that many of the eggs showed problems with their chromosomes, and some had irregular amounts of genetic material, which can lead to miscarriages and birth defects in mammals. she learned that a lab assistant had mistakenly washed the plastic mouse cages and water bottles with a harsh soap, releasing bpa from the plastic. knowing that bpa is an endocrine disruptor, a chemical that can enter organisms and mimic hormones, hunt set out to discover whether it had adversely affected her mice.

Connection compare and contrast genetic engineering to the process of natural selection. select all statements that are true.

Which organelle breaks down sugar molecules that supply energy to the cell ?