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vladimir1956 [14]
3 years ago
14

The first major wave of morphine addiction occurred during the ______.

Biology
1 answer:
stich3 [128]3 years ago
6 0
Answer is - american civil war
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What is the term that represents excessive plant growth in water that causes large amounts of inorganic substances, such as phos
tatiyna

Answer:

b)eutrophication

Explanation:

have you ever seen a lake or body of water with a layer of green on top? That's eutrophication due to heavy amounts of growth nutrients (primarily from runoffs from agriculture) in water. Simple plants utilize those and grow very fast. As they grow, they take up the oxygen and make water oxygen poor. These produce deadzones cuz the water life basically suffocates to death due to less oxygen. Eventually plants will also die

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2 years ago
True or False: The environment is changing the genotype(genetic makeup) of the rabbit?
lisabon 2012 [21]
The answer is false explanation: while environment may slowly cause evolution it doesn’t change the overall genetic make up
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3 years ago
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Plz help with 8th science
denis-greek [22]

Answer:

change in temperature

change in color

noticeable odor after reaction has begun

formation of precipitate

formation of bubbles

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3 years ago
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Horticulturists are attempting to breed a rare and beautiful variety of pine tree, where all the branches droop gracefully to th
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it's 25%

Explanation:

the recessive is two r and one R is makeing the gene dominant. Heterozygous is Rr and two make 75% dominant and 25% recessive

3 0
3 years ago
The interaction between DNA and histone proteins (forming nucleosomes) plays a key role in the regulation of gene expression in
ladessa [460]

Answer:

A. The chromatin near cis-regulatory sequences will be more closed and there will be less transcription.

Explanation:

In the presence of histones, the cis-regulatory sequences of DNA like promoter, enhancers etc. are not exposed. The function of the histone acetyltransferases (HATS) is to cause chromosome decondensation i.e. removal of histones from the DNA so that transcription of the DNA could occur. Histone acetyltransferases (HATS) cause acetylation of lysine amino acid of the histone proteins. Acetyl group is negatively charged so the acetylation of histone proteins leads to the removal of their positive charge which ultimately leads to the decrease in the interaction between N terminal of histones and negatively charged phosphate group of the DNA molecule. As soon as histones are removed from the DNA where cis-regulatory sequences are located, the DNA becomes accessible for transcription.

But here a drug has been added which blocks the activity of histone acetyltransferases (HATS) in cancer cells. So it is quite evident that in these cells, histones will not get removed from the cis-regulatory sequences of DNA so the DNA will be more closer or tightly packed as a result of which  less transcription will occur.

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3 years ago
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