1. The diagram shows the arrangement of blood vessels in the uterus wall and placenta of a pregnant woman

which will increase in concentration in the blood as it flows from 1 to 2?
A
Nino acids
B carbon dioxide
gluco
D oxygen

What is a universal way that predation benefits the predator? predation increases mate availability. predation in defense of space. the predator gets the energy it needs to survive. the predator keeps parasites from hurting the species.

Nucleic acid certain protein cell membranes certain carbohydrates

Describe two recent or ongoing space missions.