The answer is B, carbohydrates.
Carbohydrates are the first choice of the energy source of your body, they can be broken down into simple and soluble compounds such as glucose. These can be used by cells for respiration to generate energy for activities such as growth, movement, repair etc. Besides using for respiration, they are also capable of forming cell structures such as cellulose.
The right answer is Radiation balance.
Earth's radiation budget provides an inventory of the energy received and lost by the Earth's climate system, soil-atmosphere-oceans. The energy input comes mainly from the Sun, the one produced in the center of the Earth representing only 0.01% of the total energy received by the surface of the Earth.
E.coli because e coli is a bacteria.
A The observed differences in plants height are due to genetics.
The quadriceps muscles will contract.
Explanation:
Quardriceps are muscles of the thigh located in the front.
It is a group of four vastus muscles named as-the vastus lateralis, vastus medialis, vastus intermedius, and the rectus femoris.
Muscles posses the ability of contraction so an action potential that will excite the muscle cells will obviously result in contraction of the muscles.
So we can conclude that on depolarizing the muscle cell of the quadriceps will result in contraction of quadriceps.