Answer:
The electron transport chain
Explanation:
During the citric cycle in the matrix of the mitochondria, the NAD+ and FAD+ the metabolic cycle are reduced to NADH and FADH₂ through accepting electrons. The energy harnessed from the metabolic cycle is used to develop a proton motive force across the mitochondrion intermembrane. This potential energy is harnesses by ATP synthase to create ATPs. As the H+ ions drain back into the matrix of the mitochondria, they are used to reduce oxygen to water. In this redox reaction, the FADH₂ and NADH donate their electrons and are recycled back to the citric cycle in their oxidized form.
Contractile means the ability of an organism to<u><em> withhold, reduce in size or shrink. </em></u>
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A contractile vacuole will help this organism better survive in its moist environment by <u><em>preventing or stopping the cell from absorbing too much water from its moist environment.</em></u>
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- A contractile vacuole is an <em>organelle</em> that can be found in organisms that are said to be <u><em>single-celled (Unicellular organisms).</em></u>
- One of the primary functions of a contractile vacuole is to absorb <u><em>excess water</em></u> from the protoplasm in the unicellular organism and release this water to the surrounding environment.
- A contractile vacuole can be called the excretory organ of unicellular organisms. This is because it is involved in <u><em>osmoregulation.</em></u>
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- A contractile vacuole will help this organism better survive in its moist environment by <u><em>preventing or stopping the cell from absorbing too much water from its moist environment.</em></u>
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They are autotrophs.
The process by which they get energy is called Photosynthesis - it is used by plants, algae and certain bacteria to harness energy from sunlight and turn it into chemical energy.
