Answer:
Mechanical barriers — which include the skin , mucous membranes , and fluids such as tears and urine — physically block pathogens from entering the body. Chemical barriers — such as enzymes in sweat , saliva , and semen — kill pathogens on body surfaces.
Answer:
Human diploid cells have 46 chromosomes
Explanation:
True is the correct answer.
Answer:
Diffusion
Explanation:
Oxygen molecules can travel through the phospholipid bilayer using diffusion. Diffusion is when molecules travel from a higher concentration to a lower concentration.
DONT CLICK D!! i just took it and it was mitosis!!!! B is the correct answer!!!!!!!!!
