Which of the following is true of veins? They always carry oxygenated blood.
They always carry deoxygenated blood.
They are the site of exchange of gases, nurtients, and wastes between the blood
and the surrounding tissues.
They always carry blood away from the heart.
They always carry blood toward the heart.

What is the process of pulling apart an n2 molecule nevermind i got it

Need asap plz hurry im being timed when a body cell divides through the process of mitosis, the chromosomes in the daughter cells a. represent only the healthiest chromosomes from the parent cell. b. represent only half of the chromosomes in the parent cell. c. are identical to the chromosomes of the parent cell. d. are formed when chromosomes from the parent cell cross over.

Achange in which factor will affect the rate of reaction only when gases are involved? temperature pressure surface area concentration