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Natasha2012 [34]
2 years ago
6

Avery and DNA (page 289)

Biology
1 answer:
Ivan2 years ago
5 0

Yes, Avery, Mc Leod and Mc Carty do thought that genes may be involved in the transformation of non virulent rough Strains of <em>Diplococcus pneumoniae</em> to harmful smooth strained bacteria

<h3><u>Explanation:</u></h3>

Avery was a Canadian medical researcher who along with other two well known scientists of the contemporary time went for an experiment where he took two strains of bacteria Diplococcus pneumoniae - one is rough and nonvirulent and another is smooth and virulent. For a control run, he injected both the bacteria in separate mice and the expected result was there. Now as he injected heat killed smooth bacteria, the mice survived. But as he injected heat killed smooth bacteria with rough bacteria, although there was no organism which can kill the mice the mice died. And autopsy revealed the presence of live smooth bacteria in the lungs.

Thus they suspected something have gone from the dead smooth bacteria into the non virulent rough bacteria which lead to transformation of the rough bacteria to smooth ones. Thus, the experiment was carried on, which suspected role of genes in this transformation.

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earnstyle [38]

The Detroit lake of Oregon receives the orographic type of rainfall where the Gateway region of Oregon is falling in the rain shadow region. So Detroit receives a huge more amount of rainfall as compared to Gateway region.

<h3><u>Explanation:</u></h3>

The orographic type of rainfall is dependent on the landform of a region. As a mountain lies by the side of a huge lake or sea, the moisture laden wind that is coming from the sea or the lake rises along the mountain. As it ascends, the temperature of the atmosphere cools, which condenses the water vapour and the rain is precipitated on the same side of the mountain. As the wind reaches the opposite side of the mountain, it's already dry again, so very little amount of precipitation is seen there.

Same is the case with Detroit and Gateway where the Detroit lies between the Pacific ocean and Rocky mountains whereas the Gateway lies on the opposite side of Rocky mountains and doesn't get the rainfall.

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