2 Points
What must happen before meiosis can begin?
O
A. The cell membrane pinches together.
O
B. The four tetrads must be pulled apart.
O
C. DNA doubles and produces sister chromatids.
O
D. Four gametes must be produced.
SUBMIT

An example of internal feedback working to maintain homeostasis is your a. decreased respiration rate when you are studying b. decreased heart rate when you are sad c. increased respiration rate when your muscles need more oxygen d. increased heart rate when your lungs need more oxygen

How water is moving through the ecosystem ?

A(n) is a molecule influences the way that a molecule reacts.