Answer:
White blood cells.
Explanation:
The first line of defence (or outside defence system) includes physical and chemical barriers that are always ready and prepared to defend the body from infection. These include your skin, tears, mucus, cilia, stomach acid, urine flow, 'friendly' bacteria and white blood cells called neutrophils.
B because you can get cancer badly by smoking people smoke cause of stress the stress makes it worse to smoke
Answer:
Permeability of plasma membrane is the rate of passive diffusion molecules across the biomembrane.
its the phenotype. i just did it but it says i have to use 20 characters
