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vagabundo [1.1K]
3 years ago
15

Most animals exhibit bilateral symmetry. what type of symmetry is exhibited by things like starfish?

Biology
1 answer:
FinnZ [79.3K]3 years ago
5 0
They exhibit RADIAL SYMMETRY 
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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.

             are the correct options.

8 0
3 years ago
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yellow flowered plant is crossed with red one; some of the offspring had orange color phenotype . explain what happened?​
allochka39001 [22]

Answer:

incomplete dominance

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the offspring is different from the parent

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What can the dopper effect reveal about the movement of a star or galaxy
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The Doppler Effect is also known as red shift. Red shift shows the distance of galaxies. The redder the shift then the further away the galaxy, however the bluer the galaxy then the closer it is. Red Shift shows that the universe is continuously expanding. <span />
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Volgvan

Answer:

The air at the equator is warmer and less dense and the air at the polls is cooler and more dense

Explanation:

air at the equator is constantly warm, has denser air, and barely cools and the polar regions are cooler therefore that means it is dense

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