Which two stages of meioses are most responsible for genetic variation A. metaphase 1 and metaphase 2
B. anaphase 1 and prophase 1
C. metaphase 1 and prophase 1
D. anaphase 1 and prophase 1

What have we learned from fossil evidence about evolution? a) it is an abrupt change. b)the process is observable. c) it takes place during one lifetime only. d)the most complex traits are always selected.

In general, characteristics that an organism survive and reproduce become more common in a population over time. what mechanism of evolution cause this change?

At the age of 6 months, caleb was diagnosed with tay-sachs disease. as his primary care physician, what would you tell his parents about this disease?