Which statement describes renewable resources? a. fossil fuels are a type of renewable resource b. renewable resources our artificial c. renewable resources replenished quickly d. cheap energy often comes from renewable resources

The correct answer is -

C. Renewable resources replenished quickly.

Explanation

Renewable resources are those sources of energy that can be used repeatedly and replaced/renewed easily by natural means. The energy from these resources never runs off.

On the contrary, non renewable resources can not be renewed or replenished easily (such as fossil fuels, which are obtained from dead remains of plants and animals that survived millions of years back).

Example : Solar energy, which is obtained from heat of the sun and never runs off. Therefore, it is a renewable resource.

Thus, they can be quickly replenished.

C

Explanation:

cellular respiration oxidizes food into energy in the form of atps.

glycolysis (6 c hexose) > 2x atps are used > 6c hexose biphosphate > 2 x 3c triphosphate >

2 x 3c pyruvate (2x nadh produced from nad) and (4x atp produced)

pyruvate actively pumped mitochondrial matrix.

cells use diffusion to get substances in and out of themselves. that diffusion will occur across the cell membrane or the outer covering of the cell. because we are talking about the surface of the cell, surface area and volume are  important factors here. as a cell increases in size, its surface area and volume increase as well.  we call that the surface area to volume ratio (sa: vol).  but the catch is that  volume increases at a greater rate than surface  area. in other words, as a cell gets bigger, the sa: vol gets smaller. so a really small cell like bacteria is mostly cell membrane (surface) with very little contents (volume). a really big cell like an egg, is mostly insides with a super thin membrane. so what ends up happening is that the cell cannot efficiently diffuse all of the stuff it needs in/out to survive. therefore cell size is limited to about 100mm. so how do we make organisms bigger than 100mm? cells divide! by dividing and becoming multicellular, organisms are able to grow!   check out the diagrams i attached to see the effect of sa: vol. i hope this ! good luck!