Answer:B). Cell membranes are composed of a lipid bilayer.
Explanation: A membrane is a lipid bilayer that surrounds the cell. Lipids have two parts: the fatty acid chain (the tail) and the phosphate group (the head).
The phosphate head groups are polar, face outward and interact with the outside environment of the cell. The fatty acid chain is hydrophobic and nonpolar, face each other in the bilayer thus forming a hydrophobic fluid interior.
The hydrophobic nature of the bilayer interior makes the membrane to permit only nonpolar and hydrophobic molecules to pass through the cell membrane. This is the reason the membrane allows only molecules that dissolve in the lipid bilayer to pass through to enter or leave the cell.
A population of squirrels is preyed on by small hawks at maturity. the smaller adult squirrels can escape into burrows. the larger adult squirrels can fight off the hawks. after several generations, the squirrels in the area tend to be very small or very large. this is an example of disruptive selection. In disruptive selection, the extreme traits i.e., very small and very large sizes are favoured over intermediate trait i.e., average size.
Explanation:
<h3>This is Your Anwer ⬇⬇</h3>
<h3>1. Activation energy, in chemistry, the</h3><h3> minimum amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.</h3>
<h3>• True or False </h3>
<h3>1. False </h3><h3>2. True</h3><h3>3. True </h3>
<h3 /><h3 /><h3>Q 2.</h3><h3 /><h3>• Left figure is</h3><h3 /><h3> : Endothermic Reaction </h3><h3 /><h3>Endothermic reaction : In an endothermic reaction, the products are higher in energy than the reactants.</h3><h3 /><h3 /><h3>• Right Figure </h3><h3 /><h3>Exothermic reaction: In an exothermic </h3><h3>reaction, the total energy of the products is less than the total energy of the reactants.</h3>
Answer:
Principal Cell
Explanation:
The main sodium ion absorption cells are the principal cell. These cells are also the site for the action of aldosterone.
Answer:
refrain from using or disposing of (something); retain for future use.
Explanation:
