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3 years ago

As the human population grows _____.

Biology

2 answers:

egoroff_w [7]3 years ago

8 0

Explanation:

Whenever there will be increase in population of living beings then there will be increase in amount of needs or requirements.

For example, when population was only 50% then use of natural resources was about 50%. But when population increased by 70% then there will be 20% increase in use of natural resources as compared to earlier consumption.

As a result, there will be decrease in quantity of resources.

Therefore, we can conclude that as the human population grows there will be increase in consumption of resources.

Vlad1618 [11]3 years ago

6 0

Resources will go down... there is an awesome video on youtube about this btw

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alfred hershey and martha chase designed an experiment to determine the chemical makeup of griffith's transforming principle. de

MAXImum [283]

Answer:

Bacteriophages (phages) are viruses that infect only bacteria and do not infect mammalian or plant cells. Phages are ubiquitous in the environment. Phages or bacteriophages were chosen as a model system for their simplicity, as they only contained protein-coated nucleic acid. Alfred D. Hershey and Martha Chase (who were part of the bacteriophage group) in 1952 studying the infection of the bacterium Escherichia coli by the T2 phage show that the information definitely resides in the DNA. They used phage with either [32P] -labeled DNA or [35S] -labeled proteins to infect the bacteria. Immediately afterwards, they centrifuged the sample so that the infected bacteria remain in the pellet and the virus capsids (proteins) remain in the supernatant. [35S] is found in the supernatant, whereas [32P] is found in bacteria. After one cycle of infection, it was observed that when phage labeled in the [35S] proteins were used, only 1% of the radioactivity was incorporated into the progeny. But when phages were [32P] labeled, more than 30% of the radioactivity was in the progeny. They showed directly that what is transmitted from one progeny to another is the DNA and not the proteins, despite having first "diluted" in a bacterium.

Explanation:

Bacteriophages are viruses that infect bacteria in a specific way. Bacteriophages, like other known viruses, are found in an intermediate zone between living organisms and inert matter. Bacteriophages bind to the host pathogenic bacterium, introduce their genetic material, replicate inside it and destroy it. Hersey, along with his assistant Martha Chase, used phages because they knew that T2 phages were made up of 50% proteins and 50% nucleic acids and that phages entered bacteria and reproduced. As the progeny carried the same infection traits, the genetic material of this had to be transmitted to the offspring, but the mechanism was unknown. These scientists carried out an experimental work with the T2 virus, a bacteriophage that infects the bacterium Escherichia coli, which it reproduces by attaching itself to the outer wall of the bacterium, injecting its DNA into it where it replicates and directs the synthesis of the phage's own proteins. Phage DNA is encapsulated within proteins and produces phages, which lyse or disrupt the cell and release phage from progeny. They infected a culture of bacteria with radioactively labeled phages: the protein coat with sulfur (35S) and its DNA with phosphorus (32P). After infection, they separated the phages from the bacteria by violent shaking using a mixer (hence the name of the experiment). By centrifugation the much smaller phages remained in the supernatant and the much larger bacteria in the pellet. 85% of the radioactivity corresponding to DNA appeared in the pellet and 82% of the protein in the supernatant. This result supported the idea that DNA was the only component of the bacteriophage that penetrated the interior of the bacteria and, having the ability to form new phages, constituted the genetic material.

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2 years ago

Which of the following cycles involves chemically storing energy and releasing energy through the use of mitochondria?

slavikrds [6]

Answer:

Krebs Cycle

Explanation:

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3 years ago

Which of the following is a substance formed by the chemical joining of two or more elements in definite amounts?

Ne4ueva [31]

"Compound" is the one among the following choices given in the question that is a <span>substance formed by the chemical joining of two or more elements in definite amounts. The correct option among all the options that are given in the question is the first option or option "A". I hope the answer has helped you.</span>

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2 years ago

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Which process describes how an intrusive igneous rock can form?

oee [108]

I think the answer is "Fast cooling of minerals on the surface"

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2 years ago

The membrane proteins that maintain the shape of the cell membrane, form cell junctions, and allow cells to attach to the extrac

bulgar [2K]

The membrane proteins that maintain the shape of the cell membrane, form cell junctions, and allow cells to attach to the extracellular matrix are <u>whole proteins</u>, however, to better understand this answer, we need to know that....

<h3>Membrane proteins</h3>

The plasma membrane contains proteins that are embedded in the lipid bilayer. These perform several functions in the cell, such as:

Transport of substances
Enzymatic activities
and Communication between cells.

The amount of proteins and the types found in the membrane are related to the activity exerted by that cell.

The proteins present in the plasma membrane can be classified into two groups:

integral proteins
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With this information, we can conclude that integral proteins are responsible for the shape of the cell membrane, they are embedded in the lipid bilayer.

Learn more about Cell membrane in brainly.com/question/5763151

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