Plasma membrane is described as Semi permeable because it selects what molecules enter/exit the cell which is important in maintaining homeostasis.
Answer:
Amino acids are the structural units (monomers) that make up proteins. They join together to form short polymer chains called peptides or longer chains called either polypeptides or proteins. These polymers are linear and unbranched, with each amino acid within the chain attached to two neighboring amino acids.
Explanation:
Humans and animals need oxygen to survive so oxygen in the atmosphere maintains life on earth for humans and animals to breathe to survive
Answer:
third option
Explanation:
possibly the third option at 45 degrees (half of a right angle, or like mid-morning) above the horizon the sun's rays strike Earth's surface and spread out over a larger surface area with less intensity, making these regions experience lower temperatures.
