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.
Answer:
They all have same basuc cepl structure , which consists of cytoplasm , nucleus , !nd outer membrane
The correct answer is: Galaxies in the universe are moving away from the earth.
The correct answer is: "the West Coast receives it's wind and weather patterns from the ocean, while the East Coast receives them from land"
