Answer: B) proteins in the membrane act like gates to control entrance and exit of molecules.
Explanation: Plasma membrane is composed of phospholipids bilayer in which the hydrophobic regions of the phospholipids face each other to form the core of the bilayer. Proteins are embedded in the bilayer through an interaction between the amino acid side chains and the nonpolar acyl chains of the phospholipids. The embedded membrane proteins form channels for passage of ions and other molecules. Each membrane protein is selected for one or more ions or molecules that passes through it. The membrane is said to be semipermeable because it allows the passage of some molecules and excludes the passage of others.
The troposphere has the highest density.
Atoms in molecules share pairs of electrons when they make ionic bonds.
most are formed when a plant or animal dies in a watery environment and is buried in mud and silt.
Answer:
True
Explanation:
Bias is unequal weight in favor of or against an idea or thing, usually in a way that is unfair,narrow-minded or prejudicial. This can also be regarded as pattern of digression from standards in judgment, whereby speculations may be made unreasonably.
