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Lubov Fominskaja [6]
3 years ago
10

What element is this? how do you know?

Biology
1 answer:
Kitty [74]3 years ago
5 0

Answer:

Helium

Explanation:

We know that this atom has two positive particles on the nucleus (protons) with two neutral particles (neutrons). We can also see that it hass two electrons on the orbitals. Knowing this, we can say that the element is Helium.

Helium has a relative atomic mass of 4 and it's atomic number is 2. The atomic number is equal to the number of protons and electrons the atom has, and the atomic mass can be used to calculate the number of neutrons:

Relative atomic mass = Neutrons + atomic number

So we know that:

Neutrons = relative atomic mass - atomic number

Neutrons = 4 - 2 = 2.

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In the classic Meselson and Stahl experiment, E. coli are first grown in 15N-enriched media (0th generation) and, subsequently,
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Answer:

The correct answer is - option e.)

Explanation:

The experiment that was performed by Meselson and Stahl was created to prove that DNA replication is a semiconservative process.

When Bacteria grow on 15N media they incorporate the isotype of nitrogen and after few generations, the culture moved to 14N media where it incorporates as they replicate in semi-conservative mode and one DNA strand comes from the Parent DNA.

The right option for question one is Option (e) Run as one band, at a position expected for DNA containing a 14N:15N ratio equal to 1.

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3 years ago
In the scientific method: Select one: a. Hypotheses to be tested are formulated after collecting the data. b. Publication is an
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In the scientific method, the self-correcting nature of science usually means that mistakes or even deceptions do not last long.

Scientific Method

The scientific method is the process chosen by scientists and researchers to investigate or verify a  phenomenon.  It involves various steps such as making an observation, asking the question, forming the hypothesis, collecting the data, testing the hypothesis, and deriving the conclusion.

Science is always self-correcting as every piece of information is scrutinized over and over again. Often disproving existing information with appropriate evidence is considered a prestigious and high achievement. This is unlike politics, religion, etc where such a person might get prosecuted. It is often regarded as the aim of science is not to proclaim a piece of information as absolute truth but to keep improving a piece of existing information.

Learn more about the scientific method here:

brainly.com/question/7508826

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6 0
2 years ago
If a child only eats fries, What macromolecule might be deficient and how will it affect her?
Elodia [21]

Answer:

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Explanation:

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3 0
3 years ago
Distinguish between incomplete dominance and codominance
mixas84 [53]

Answer:

In incomplete dominance a heterozygous individual blends the two traits. ... With codominance you'll see both alleles showing their effects but not blending whereas with incomplete dominance you see both alleles effects but they've been blended.

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and i got my answer from brightstorm.com its a biology website we use at school

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