There are equal numbers of protons and electrons in neutral atoms. true false

How can an organ, such as the lungs, work for multiple body systems?

Once an egg cell is fertilized by sperm, the cell then, as the embryo develops, it receives nourishment and eliminates wastes by transferring substances from its blood to its mother's blood. a. becomes a fetus immediately and exits the womb b. begins to divide and implants itself in the wall of the uterus c. remains in the uterus without dividing for several months d. travels back to the ovaries until the fetus is developed

Kinases add - groups to other enzymes. this activities some enzyme while inhibiting other