Answer;
-Mitochondrion
Explanation;
-A light microscope is an instrument that uses visible light and magnifying lenses to examine small objects not visible to the naked eye, or in finer detail than the naked eye allows.
-Cell organelles that can be seen under light microscope includes; cell membrane, nucleus, nuclear membrane, cytoplasm, vacuoles, cell wall, chloroplasts.
-Mitochondria is an organelle found in the cytoplasm composed of many layers of membrane. site of respiration + production of energy. This is the smallest organelle that can be seen under research grade light microscope.
Answer:
Aquaporins
Explanation:
Aquaporins are the channel proteins that is present in the membrane of the cell which allow water to cross the membrane very quickly. This aquaporins play an important roles in plant cells, red blood cells, and certain parts of the kidney where this protein minimize the amount of water lost as urine. Without this protein, the diffusion of water across the cell membrane is not possible very quickly.
Speed = distance / time = (420 x 1000) / (6 x 3600) = 19.44 m/s