Microtubules have an inner diameter of and an outer diameter of . Microtubules have an inner diameter of and an outer diameter of . 15 mm; 25 mm 8 nm; 12 nm 25 nm; 30 nm 15 nm; 25 nm 7 mm; 14 mm

C. 25 nm; 30 nm

Explanation:

Microtubules are tubulin polymers which form part of the cytoskeleton and provide the eukaryotic cells with structure and shape. A microtubule's outer diameter is 30 nm, and its inner diameter is 25 nm.

Microtubules are fibrous, hollow shafts whose principal function is to support and shape the cell. They often serve a role of transport, as they are the routes by which organelles travel through the cell.

Hence, the correct option is C.

photosynthesis makes the glucose that is used in cellular respiration to make atp. the glucose is then turned back into carbon dioxide, which is used in photosynthesis. while water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water.

the wetland preservation movement began in the u.s. in earnest with the clean water act (cwa) of 1972. although not specifically written to protect wetlands, the cwa is comprised of a series of regulations designed to prevent pollutants from contaminating u.s. waters.