The reason why sharks can swim fast is that unlike most fish, sharks have tails that are not horizontally symmetrical . Instead , the top of a shark's tail protrudes further back than the bottom , giving the shark lift while swimming and making it "spring" forward at speed.
Most fish make a single water "ring" that moves backward at the end of their tail's stroke but sharks are thought to produce two rings because of their asymmetrical tail which bespeaks a more efficient propelling action.
It has also been discovered that sharks can raise the tiny teeth-like structures called placoid scales on their skin to create tiny wells across the surface of their skin which reduces drag just like the dimples on a golf ball, thus enabling the shark move forward faster.
88 is c and I think 89 is E
This is most likely the result of OXIDATION. When an apple is cut open, the cells of the apple are exposed to the atmosphere, the in built defense mechanism inside the apple that is supervised by certain enzymes react to this situation by reacting with oxygen and creating an oxidized brown layer which protects the apple from foreign bodies.
single stranded
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What is RNA virus?</h3>
- Deoxyribose and ribose, respectively, are the names of the pentose sugars found in DNA and RNA.
- The presence of the hydroxyl group on the 2' carbon of ribose and its lack on the 2' carbon of deoxyribose distinguishes the sugars.
- While the sugar used to construct both DNA and RNA is named deoxyribose (left in the image), the sugar used to construct RNA is simply referred to as ribose.
- Ribose, a 5-carbon sugar, is present in RNA, whereas deoxyribose, a 5-carbon sugar, is present in DNA.
- Both kinds of sugar are crucial parts of nucleotides.
- Pentose sugars, which are a component of DNA, can be found in nucleic acid.
Learn more about RNA here:
brainly.com/question/19535415
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<span>The best answer to the question above is (c.) follicle. In the female body, each egg is surround by a follicle, which breaks open when the egg is mature. This follicle helps the egg to move around and catch the sperm cells during the fertilization.</span>
