In complete sentences describe the atmosphere of early earth.

1 answer:

4 0

For decades, scientists believed that the atmosphere of early Earth was highly reduced, meaning that oxygen was greatly limited. Such oxygen-poor conditions would have resulted in an atmosphere filled with noxious methane, carbon monoxide, hydrogen sulfide, and ammonia. As the Earth cooled down, most of the water vapour condensed and formed the oceans.

To date, there remain widely held theories and studies of how life on Earth may have been built out of this deadly atmosphere cocktail.

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What foods do NOT allow progressive bacterial growth?

MariettaO [177]

Among the choices provided the answer to the question is salt. Sustenance protected with salt or sugar incorporate the previously mentioned corned hamburger and additionally bacon, salt pork, sugar-cured ham, organic product jelly, sticks, and jams, among others.

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Which phrases are true of only the mantle? Check all that apply.

Over [174]

Answer:

i had to list all the facts cuz we didnt have a diagram

Explanation:

The mantle is the mostly-solid bulk of Earth's interior. The mantle lies between Earth's dense, super-heated core and its thin outer layer, the crust. The mantle is about 2,900 kilometers (1,802 miles) thick, and makes up a whopping 84% of Earth's total volume.

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Many different types of mutations can occur within the body. An individual experiences a mutation that changes a base

Georgia [21]

Answer:

The type of mutation responsible for changing a base in the mRNA strand, without changing the coding aminoacid or protein, is called a silent mutation.

Explanation:

In a silent mutation occurs the change of a nitrogenous base in one of the codons that encodes an aminoacid, without changing the aminoacid or altering the structure or function of the protein to be synthesized.

In this type of mutations the change of the base does not mean the change of the aminoacid, because some aminoacids can be coded with more than one codon. In the case of Leucine, the codons that encode it are CUU, CUC, CUG or CUA, so even if a base changes, the final protein will be the correct one.

For the other options:

Missense: the change of the base in the DNA chain implies the change of the codon in the mRNA and of the encoded aminoacid, in that way a structural and functional alteration of the synthesized protein occurs.

Nonsense: the change in the nitrogenous base in the DNA leads to the coding of a termination codon, so that the protein is ultimately incomplete.
Insertion: in this case there is the addition of more nitrogenous bases to the DNA chain, with respect to the original one.

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katen-ka-za [31]

I think it is true because musicians do have to know their instrments and they have to know how to play it how to read the music or if you sing there is a lot more to it. and with athletes they have to have good strength and they have to understand whatever sport they play.

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You have gone into the field to take water samples from

timofeeve [1]

Answer:

Lake A: pH = 4.5; Lake B: pH = 7.5

Explanation:

I think that one because if you look on the acid vs base chart acid is from 0-6 and bases are from 8-14 and acids are less toxic, so you would infer that lake A has acid and lake B has bases.

i would have picked the ones closest to 7 ,which is neutral, but I'm not sure that a base can be lower then 7 so I didn't pick answer C

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