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Tema [17]
2 years ago
11

How is Bohr's atomic model different from Rutherford’s model?

Biology
2 answers:
Aleonysh [2.5K]2 years ago
8 0
Answer is The second one
irga5000 [103]2 years ago
5 0

Answer:

Option A, Electrons in Bohr's model are placed in orbits of different energy levels.

Explanation:

Bohr’s atomic model gave the concept of discrete energy levels with in an atom while no such concept was outlined by Rutherford. Thus, option A is correct.

While other options are incorrect because of following reasons –

Option B- Both Bohr and Rutherford model proposed existence of dense core of atom which majorly constitutes the mass of atom.

Option C - Both Bohr and Rutherford model proposed existence of electron which revolve around the central mass of  atom

Option D – This concept was proposed neither in Bohr nor in Rutherford atomic model

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If an underwater volcano bubbled additional co2 into the ocean, would this sequence of reactions be driven to the left or the ri
galina1969 [7]

Answer;

-The reactions will be driven to the right

Explanation;

Volcanic eruptions are known to throw huge amounts of gas into the atmosphere, including carbon dioxide that are thought to increase global warming.

They spew lava, carbon dioxide and other elements into the deep oceans. The carbon gets trapped in circulating water, cycled to different regions of the ocean, where it gets caught up in upwelling currents and emitted to the atmosphere.The process can take up to 2,000 years and adds a fraction of the 88 million metric tons of carbon belched out by the volcanoes to the atmosphere.

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2 years ago
What happens to RNA polymerase II after it has completed transcription of a gene? a. It begins transcribing the next gene on the
Over [174]

The correct answer is: b. It is free to bind to another promoter and begin transcription

Transcription is the first step of gene expression in which DNA molecule is copied (transcribed) into RNA (mRNA) by RNA polymerase. The process of transcription is divided into three phases:

1. Initiation

• RNA polymerase with transcriptional factors bind to gene promoter  

• RNA polymerase unwinds DNA double helix (transcription bubble is formed)

2. Elongation

• RNA polymerases adds nucleotides complementary to DNA  

3. Termination

• RNA polymerase gets to stop codon (transcribes a sequence of DNA known as a terminator)

• Formed complementary RNA strand is released from DNA-RNA complex.

RNA polymerase is also released and can transcribe some other gene by binding to its promotor. RNA polymerase will transcribe just the genes whose products are needed at a particular moment.

7 0
2 years ago
Historically, global climate
DaniilM [7]
Has varied greatly over time
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3 years ago
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Olympic athletes train in Colorado Springs, Colorado because this location is at high altitude and near the 14,000 foot Pikes Pe
Stels [109]

Answer:

A: Oxygen levels are low and, therefore, more red blood cells are produced, giving the athletes an advantage when competing at lower altitudes.

Explanation:

<em>At high altitudes, the partial pressure of oxygen is lower compared to lower altitudes</em>. The body system try to adjust to lower oxygen level by undergoing several physiological changes. Depending on the duration spent in high altitude, the body can either try to adjust in the short term or acclimatize for a longer term.

One of the processes the body undergoes during acclimatization is an increase in red blood cell production. The kidney secretes erythropotein in response to inadequate oxygen in body tissues, and this makes the liver to increase erythrocyte production.

The increase in red blood cell production correspondingly increases the oxygen-carrying capacity of the blood as a result of increased hemoglobin. This condition persists for a few weeks even after the body returns to lower altitude where oxygen is adequate. Increased oxygen capacity means the rate of energy production (through respiration) within the body will also increase

<em>Hence, those who acclimatize to high altitude usually experience increased capillary density, tissue perfusion and improved athletic performance at lower altitudes. </em>

The correct option is A.

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3 years ago
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