It’s corresponding molecule that or bonds to. I think it is a substrate.
Answer:
You have external defense systems, which include your skin, tears, mucus, saliva, stomach acid, cilia (small hairs) and helpful bacteria. The skin, nails and hair form the integumentary system, which stops dirt and pathogens from entering the body.
<span> The </span>agents of metamorphism<span> include heat, pressure (stress), and chemically active fluids.</span>
Answer:
C
Some vertebrates are warm blooded while others are cold blooded
