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Biology

1 answer:

BartSMP [9]3 years ago

5 0

Answer:

The correct answer is option A) "The plasmid would not contain the human gene because the cuts are not compatible".

Explanation:

One of the basis of genetic engineering is to use the proper restriction enzymes to cut fragments of DNA. After cutting DNA with restriction enzymes most of the time the fragments have sticky ends, which are a few nucleotides that are one stranded and complementary to each other. Scientists take advantage of this characteristic and use the same restriction enzyme to cut genes and plasmid and later put it together with DNA ligases. If genes and plasmids are accidentally cut with different restriction enzyme it is very likely that the plasmid would not contain the human gene because the cuts are not compatible, since no sticky ends are generated.

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Match each type of organism to a characteristic that describes it. Produce food from inorganic materials cannot survive in the p

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<h2>Type of Organisam to a Characteristic </h2>

The chloroplast produces food from inorganic materials. Anaerobic organelles cannot survive in the presence of oxygen this is because oxygen does not help in it's growth. Though eukaryotic cells contain cell nucleus. This is why chloroplasts produce food through photosynthesis.

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3 years ago

During ________ the chromosomes, which were distinct and condensed, begin to spread out into a tangle of chromatin. a nuclear en

polet [3.4K]

During telophase in mitosis or meiosis II, where chromosomes which were previously distinct and condensed, de-condense and spread out into a tangle of chromatin. At the same time, the nuclear envelope re-forms around each cluster of chromosomes in each of the daughter cells, and spindle fibres disintegrate.

Chromosomes are unlikely to de-condense and spread out into a tangle of chromatin during telophase I (i.e. Telophase of Meiosis I), since Meiosis is still ongoing, and the genetic material should be in its condensed form during Meiosis II as well.

Hope this helps! :)

8 0

2 years ago

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Microscopic plants called algae grow inside the top layer of sea ice in the Antarctic if enough sunlight reaches that layer of i

MrRa [10]

Answer:

The correct answer is: (A).

Explanation:

In the question, it is mentioned that the algae can grow under the conditions of "enough sunlight" and "enough nutrients".
Sunlight reaches the algae, by first falling on the surface made up of ice and snow and then refracting from there into the top layer of the ice where the algae grows.
However, the capability of both snow and ice to reflect sunlight is far more than that of refracting sunlight.
Therefore, the amount of light received by the algae is similar in absence or presence of the layer of snow on the top layer of ice.
However, on deposition of snow on the layer of the ice, the weight of the ice increases and it sinks below into sea water.
This allows more nutrient rich sea water to percolate into the ice and reach the algae.
The algae receive more nutrients from the sea water and hence is capable undergoing better metabolism and growth.
Hence, more algae are produced under such a situation.

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3 years ago

Me:

Licemer1 [7]

Answer:

the answer is B

Explanation:

because pangaea was a super continent

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3 years ago

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What happens to temperature and pressure when altitude increases?

timofeeve [1]

Answer:

Thus the air temperature is highest near the surface and decreases as altitude increases. ... Therefore, air pressure decreases as we increase altitude. The air density depends on both the temperature and the pressure through the equation of state and also decreases with increasing altitude.

Explanation:

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2 years ago