During which phase of meiosis do tetrads line up in the middle of the cell? prophase II
metaphase II
anaphase I
metaphase I

Amylase is an enzyme found in the human digestive system. why do you think it was important to keep the enzyme temperature about 37 degrees celsius (98.6 degrees f)? describe what might happened the temperature decreased by 10 degrees celsius.

List two modern organisms that have pentameral symmetry

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?