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3 years ago

What is the function of the septum

1 answer:

Ber [7]3 years ago

7 0

There are several septum's within the body. The term septum simply just means, a divide between two things. If you are referring to the cardiac septum; which separate the heart into left and right sides. There is a top portion of the septum which is called the atrial septum and the bottom portion of the septum; which is called the ventricular septum. They typically keep the deoxygenated blood and the oxygenated blood separated from each other.

If you're referring to the nasal septum, the nasal septum acts as a pathway stabilizer to make sure that the air we breathe in is not "lost" and gets resistance going into our lungs.

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In the classic Meselson and Stahl experiment, Coli are first grown in 15N-enriched media (0th generation) and subsequently switc

AfilCa [17]

Options are not provided inthe question. Th ecomplete question is as following:

In the classic Meselson and Stahl experiment, Coli are first grown in 15N-enriched media (0th generation) and subsequently switched to 14N media. A DNA sample isolated during the first generation of E. Coli grown in 14N media is subjected to a centrifugation step in a dense CsCl gradient. Assuming that replication occurs in a semiconservative fashion, the DNA sample will _______.

1) run as two bands (of equal intensity), one at the same position as a uniformly 15N-labeled DNA, and one at the same position as a uniformly 14N-labeled DNA.

2) run as one band, at the same position as a uniformly 15N-labeled DNA.

3) run as one band, at the same position as a uniformly 14N-labeled DNA. run as one band, at a position expected for a DNA containing a 14N:15N ratio equal to 7.

4) run as one band, at a position expected for a DNA containing a 14N:15N ratio equal to 1.

Answer:

Explanation:

In 1957, Meselson and Stahl gave an experimental evidence for semi-conservative replication of DNA, means that each DNA strand act as template for synthesis of new DNA.

For the experiment, they use E. coli grown in heavy isotope of 15N nitrogen and switch to 14N nitrogen undergoing one, two, or three generations and the DNA samples are collected. The DNA samples are then mix with cesium chloride and separated as light and heavy DNA.

As the replication occurs in a semiconservative fashion, the double DNA sample will run as two bands with intermediate density, having mixtures of 15N and 14N DNA, either of which would have appeared as DNA.

Hence, the correct option is (1).

8 0

3 years ago

A nurse who suspects that a newly admitted infant is the victim of child abuse assesses the parents' interaction with their baby

Semenov [28]

If a nurse suspects that a newly admitted infant is the victim of child abuse, the following parental behaviors might support the diagnosis of child abuse:

1. The parents focus on the child's role in sustaining the injury
2. The parents are changing the account of how the injury occurred
3. Their explanation of how the injury was sustained is not consistent with the injury

7 0

3 years ago

Write a hypothesis about how the interaction of tectonic plates may cause earthquakes.

iVinArrow [24]

Answer:

hope this helps

Explanation:

Techtonic plates interacting with each other would cause an earthquake because they are essentially the earth's foundation so by sliding together they would cause rockfall and make a rumble which is basically what an earthquake is and when they interact its basically the earth moving so it would cause shaking and rumbling which is what happens in an earthquake

(Additionally) in the aftermath of an earthquake the plates are either moving or settling down which is why frequently after an earthquake there is a mini one following it

3 0

3 years ago

In a food chain 200 kg of wheat is fed on by 18 kg of mice which in turn are eaten by 1kg of hawk. What is the percentage energy

Nikolay [14]

Answer:

0.1% of energy

Explanation:

Energy flow: From the whole quantity of energy that reaches the earth's surface, autotroph organisms or producers absorb only 0.1 or 1%.

From the input of solar energy begins a unidirectional energy flow through all the organisms in the ecosystem, from autotrophs to heterotrophs, until it is dissipated in the environment.

At each trophic level occurs an energy transfer to the next, with only 10% being usable in each of them. This assessment is called "The 10% rule". As a general rule, only about 10% of the energy stored as biomass at one trophic level, per unit time, ends up as biomass at the next trophic level, in the same unit of time.

If wheat transferred 10% of the energy to mice, and of that 10% mice transferred 10% of the energy to hawk, then the percentage of energy transferred from the first trophic level to the third equals 0.1%.

10% (1st TL-2nd TL) / 10% (2nd TL - 3rd TL) = 0.1% (1stTL - 3rd TL)

TL = Trophic level

8 0

3 years ago

Much of the pollution in the environment is a result of

Taya2010 [7]

Answer:

I may be wrong but try A.

8 0

2 years ago