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larisa [96]
3 years ago
11

What where the conditions like on early earth

Biology
1 answer:
Ipatiy [6.2K]3 years ago
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

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For a science fair project, two students decided to repeat the Hershey and Chase experiment, with modifications. They decided to
Reptile [31]

Answer: E. Amino acids (and thus proteins) also have nitrogen atoms; thus, the radioactivity would not distinguish between DNA and proteins.

Explanation:

The Hershey-Chase experiment, is an experiment that demonstrated that the genetic material of phage isn't protein but rather it's DNA.

Based on the information given in the question, the experiment will not work because amino acids (and thus proteins) also have nitrogen atoms; thus, the radioactivity would not distinguish between DNA and proteins.

Therefore, the correct option is E.

4 0
3 years ago
Which is true about breathing while you exercise? A. You should always hold your breathe when you are working hard. B. If you st
Vlad1618 [11]

Answer:

D

Explanation:

7 0
2 years ago
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Twenty-five people developed symptoms of nausea, vomiting, and diarrhea three to six hours after attending a church picnic where
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Answer:

e. staphylococcal enterotoxin

Explanation:

Staphylococcal enterotoxin is a toxin that is produced by the bacteria Staphylococcus aureus. It is a toxin found inside the gastrointestinal tracts of the human body which is why it is called an enterotoxin and it results in food poisoning when consumed by humans.

Staphylococcal enterotoxin is proteinous in nature and it can be found on dairy products such as milk or cheeses that have been contaminated by Staphylococcus aureus.

After consumption of the contaminated milk or cheeses, the person begins to experience symptoms of nausea, diarrhea as well as vomiting.

Staphylococcal enterotoxin is a very heat stable toxin which means even though you heat up a food contaminated with this toxin, the bacteria may die by the toxins would still remain in the food.

The best way to avoid food poisoning by Staphylococcal enterotoxin is to avoid eating contaminated foods.

5 0
3 years ago
What two minerals can be identified by taste?
Bas_tet [7]
The correct answer of the given question above would be option A. SULFUR AND HALITE. The mineral halite is the  most common mineral that can be identified by taste. In addition, sulfur can also be identified due to its metallic taste. Hope this answer helps. 
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3 years ago
One of the main sources of sediment in flowing water is
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I think it is B  I had done these.
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3 years ago
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