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erastova [34]
3 years ago
5

Why are chemical changes considered "unseen" ?

Biology
2 answers:
Zielflug [23.3K]3 years ago
6 0
Because they take place at an atomic level and are unable to be seen by the human eye
alexira [117]3 years ago
5 0
They are unseen because it is physically impossible to see a chemical change with a human eye.
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A chemical has been found to harm the same components in both prokaryotic and eukaryotic cells. witch components are those?
sukhopar [10]
<span>DNA, cell membrane, ribosomes, and membrane-bound</span>
5 0
3 years ago
During a long-distance run on a hot day, an athlete produces large quantities of sweat. As a result, the kidneys change the rate
Anton [14]

Answer:

To regulate water balance in the body

Explanation:

The kidneys are two bean shaped renal organs which perform a host of functions for the body such as regulating fluid balance, filtering minerals from the blood etc. Among their functions is the regulation of water balance in the body through the antidiuretic hormone.

When an athlete completes a physical activity and sweats a lot, the kidney reacts to the loss of water by sweat by adjusting urine output causing the body to produce lower and more concentrated urine.

5 0
3 years ago
Which of the following are important features for transcription?
devlian [24]

Answer:

The correct answer will be option-A and B.

Explanation:

Transcription is a process which synthesizes a complementary molecule of DNA which acts a messenger called RNA.

The gene contains a sequence of the nucleotide at the beginning of gene called promoter sequence. The promoter sequence has the ability to attach an RNA synthesizing enzyme called RNA polymerase.

The RNA polymerase is the enzyme which synthesizes the RNA molecules using a single strand of DNA called template strand.  RNA polymerase binds nucleotide at 3' end of the strand thus proceeding the strand in 5' to 3' direction.  

The promoter and RNA polymerase begins the process of transcription and thus option-A and B is the correct answer.

6 0
3 years ago
What part of the cardiovascular system is responsible for the one-way flow of blood through the chambers of the heart?
Ilya [14]
It would be the atria i think

5 0
3 years ago
Whereas cloning is commonly used in studies of bacteria, Dolly the sheep was the only animal ever cloned.
nignag [31]

Answer:

False

Explanation:

I heard of that sheep before I leard about this in like 6th or fith answer is false

Two years later, researchers in Japan cloned eight calves from a single cow, but only four survived. Besides cattle and sheep, other mammals that have been cloned from somatic cells include: cat, deer, dog, horse, mule, ox, rabbit and rat

6 0
3 years ago
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