Molecules always tend to move downhill i.e, from higher concentration to lower concentration, but if a molecule has to move uphill i.e towards higher concentration then energy has to be spent.
Active transport requires energy in the form of ATP i.e. ATP must break down for the movement of molecule against its concentration gradient. (ans is A)
1: False. Chemical.
2: False. Endocrine.
Answer:
A
Explanation:
Butter, as good as it is, is not exactly good for us. Butter is an animal fat, or a saturated fat. This means that at room temperature these fats will remain solid. There is some science behind it and ill say this quickly, it has to do with the carbon atoms being packed with hydrogen atoms. This allows them to intertwine and be solid. The Vegetable Oil being unsaturated, a plant fat, is good for us! These are missing some of the atoms needed to make them stand up straight and be solid. So these are always liquid at room temperature! :)
Explanation:
Gene expression is the process by which the instructions in our DNA are converted into a functional product, such as a protein.
Because the walls of veins have high compliance, they can accommodate a relatively large volume of blood with a relatively small increase in internal pressure.
<h3>What are veins?</h3>
Veins are specific blood vessels of the circulatory system that transport deoxygenated blood to the hearth.
Vein blood vessels have high compliance to increase the volume of blood cells that can be transported.
During this process, the internal pressure of the walls in the vein blood vessel is minimized.
Learn more about veins here:
brainly.com/question/64497