All categories

3 years ago

What was early Earth's atmosphere like?

Biology

2 answers:

Lera25 [3.4K]3 years ago

4 0

Answer:

Earth early atmosphere was like it had almost no atmosphere. The surface was molten. As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today's atmosphere.

andrezito [222]3 years ago

3 0

When Earth formed 4.6 billion years ago from a hot mix of gases and solids, it had almost no atmosphere. The surface was molten. As Earth cooled, an atmosphere formed mainly from gases spewed from volcanoes. It included hydrogen sulfide, methane, and ten to 200 times as much carbon dioxide as today's atmosphere.

You might be interested in

Both plant and animal cells:

Salsk061 [2.6K]

The answer should be b

7 0

3 years ago

Samples as small as a few skin cells can potentially contain DNA. T/F

Travka [436]

<u>Answer</u>: True

<u>Explanation</u>:

DNA (Deoxyribonucleic acid) is the genetic material present inside the nucleus of all eukaryotic cells.
Samples as small as few skin cells also contain DNA and the presence of DNA in skin cells is often used to identify the DNA of a person in a crime scene.
Further, with the use of PCR technology, the small amount of DNA obtained from skin cells can be amplified into many copies.
Therefore, the given statement is true.

8 0

4 years ago

Scientist are studying an 500g. Sample of a radioactive element. Which has an annual decay rate of 11%. How many grams of the sa

gtnhenbr [62]

Nothing

Explanation:

Mass of the sample = 500g

Decay rate per anum = 11%

Unknown:

Mass of sample remaining after 10yrs = ?

Solution:

This is a simple percentages problem;

The radioactive sample loses $\frac{11}{100 }$ x 500g of sample per year;

this is a loss of 55g per year;

In 10years time, the sample would have lost 10 x 55g = 550g of element.

Since our sample is not up to 550g, then no amount of sample will remain after 10yrs.

learn more:

Radioactive decay brainly.com/question/10094982

#learnwithBrainly

6 0

4 years ago

Which molecular activity requires a folded structure?

Mice21 [21]

B - Because an active cell can only work if it has a 3-Dimension structure.

7 0

3 years ago

Explain how prokaryotic and eukaryotic cells are similar

STatiana [176]

Answer:

Like a prokaryotic cell, a eukaryotic cell has a plasma membrane, cytoplasm, and ribosomes, but a eukaryotic cell is typically larger than a prokaryotic cell, has a true nucleus (meaning its DNA is surrounded by a membrane), and has other membrane-bound organelles that allow for compartmentalization of functions.

Explanation:

4 0

4 years ago