The portion of the Moon's surface that cannot be directly observed from Earth
Answer:
B
Explanation:
I've had this question before got it right.
Water (H2O) takes up more than 60% of the body thus the answer is C
Answer: Substances that are protein based cannot cross the lipid cell membrane, but can exert their effect by binding to the proteins based receptors present on the lipid bilayer.
Explanation:
Hormones such as calcitonin , Parathyroid hormone and pituatry horomones are proteins and water soluble.They cannot cross lipid bilayer but can bind to ligand binding protein receptors.
These receptors are protein macromolecules that are specific in nature for specific hormones.
After binding to the receptors, these hormone-recpetor complexes activate second messengers and regulate the downstream effects.
Rock moves outward, A crack forms, Magma pushes upward, Magma hardens
