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svlad2 [7]
2 years ago
10

Scientists have created trains that use magnets to make the trains float above the tracks as they travel. These trains float bec

ause
(a) the track is waxed (c) the like poles repel
(b) the train has a low density (d) a chemical change occurs
Biology
1 answer:
Arada [10]2 years ago
7 0

Answer:

the poles repel

Explanation:

i believe this is the best answer

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Which benefits do mangrove trees provide to surrounding coastal wetlands? Check all that apply.
Anon25 [30]

The mangroves trees help in holding the soil in place, they help in absorbing the energy of waves, and they help in filtering water and better the quality of it.  

Mangroves are a kind of estuarine or coastal wetland, featured by the existence of salt amended shrubs and trees, which develops beside the coast in subtropical or tropical latitudes all around the world. Several of the mangroves forests can be determined by their dense tangle of prop roots, which make the trees seem to be standing on stilts above the water.  

The mangroves safeguard the shorelines from destructing hurricane, storms, winds, and floods. They help in inhibiting erosion by stabilizing the sediments with their tangled root infrastructure. They sustain the clarity and quality of water, trapping the sediments and filtering pollutants arising from land.  


6 0
3 years ago
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What was known before Franklin and Wilkins conducted their studies of DNA? Check all that apply. DNA is found in the nucleus of
kvasek [131]

Answer:

The correct answer will be-

   1. DNA is found in the nucleus of a cell

    2. Organisms store and transmit genetic information

    3. Cells contain protein molecules.

Explanation:

The study of DNA started much before the discoveries of Rosalind Franklin and Maurice Wilkins.

Nucleus of cell was discovered by Robert Brown in 1831 but the material present inside the nucleus called "nuclein" (DNA) came from the studies of Johann Friedrich Miescher in 1869.

Proteins as a constituent of cell were discovered by the experimental analysis of Gerhardus Johannes Mulder in 1837.

DNA as a genetic material came from the experimental studies of Frederick Griffith in 1928, Oswald Avery, Maclyn McCarty, and Colin MacLeod in 1944, and Hershey and Chase in 1952.

Franklin and Maurice Wilkins are known for their work on the the structure of DNA as they were able to produce high-resolution X-ray photographs of DNA fibres called Photo 51 in 1952 using X-ray diffraction technique. By 1953 Franklin concluded concluded that DNA shows helical structure with phosphates on outer side.

Thus, 1. DNA is found in the nucleus of a cell

         2. Organisms store and transmit genetic information

         3. Cells contain protein molecules.

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8 0
3 years ago
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How do you translate this?
yawa3891 [41]

Answer:

Hello sir or m'am, the answer you are looking for is rotate the picture. Think of rotation as 360 degrees. Try rotating your picture in an editing software, to get the answer your looking for. I can read it Tagg it says more than that try rotating your picture in an editing software. Thank you for participating in brainly. Your questions are appreciated.

Explanation:

4 0
3 years ago
which of the following levels of protein organization shows the complete 3D arrangement of the polypeptide chain
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Proteins are the macromolecules made of hundreds of amino acids. Proteins are most varied class of biological molecules and show the greatest variety of structures. Many have detailed three-dimensional folding patterns that result in a compact form, but others do not fold up at all and they are in random conformations. The function of proteins depends on their structure.

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