C. octopi are invertebrates and fish are vertebrates.
The reason why the Southern California steelhead run sizes has decreased by 90% is the construction of dams along water sources.
<h3>What is a dam?</h3>
The dam is a large structure that serves the purpose of holding back water and making its level to rise quite high. Dams could be used for the purpose of electricity generation.
The reason why the Southern California steelhead run sizes has decreased by 90% is the construction of dams along water sources.
Learn more about a dam:brainly.com/question/13945438?
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Answer:
Gel Electrophoresis is a way to sort and measure the DNA strands. Scientists use the technique whenever they need to sort DNA strands according to lengths, this is because it helps them determine patterns, banding patterns create a unique fingerprint for a certain individual. During the process, the shorter strands move faster because they have less mass compared to the longer strand. Therefore, the short strands end up farther away from the starting point than the longer strands, which is how the difference in lengths sort themselves out.
Single celled organisms such as amoebas, especially those that live in fresh water, continually gain water from their surrounding environment by osmosis. This water is pumped into a contractile vacuole which fills with fluid and periodically fuses with the cell membrane, releasing its contents to the exterior. Thus the amount of water actively transported out of the cell is equal to the amount of water entering the cell due to osmosis and there are no variations in the tonicity of the cell. This is homeostasis at a simple level. Without the contractile vacuole, the amoeba would continue to absorb water until its cytoplasmic contents were diluted to such an extent that metabolism no longer occurred and it would die.
