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Svet_ta [14]
3 years ago
9

Why is alchemy no longer accepted?

Biology
2 answers:
Elza [17]3 years ago
8 0
The answer is D. Scientists used evidence, analysis,and experiments to disprove alchemy
deff fn [24]3 years ago
8 0

Answer:

The correct answer is D. Scientists used evidence, analysis, and experiments to disprove  alchemy.

Explanation:

Alchemy was based on changing a non-precious material into a precious material like lead into gold. It was considered as magic and science before the 19th century because in the 19th-century scientist get to know about the nature of metals and the periodic table that disproved alchemy.

Alchemist said that everything is made up of soil, water, fire, and earth but after the advancement of chemistry and physics it became clear that everything is made up of atoms, and lead is also made up of atom which can not be converted into gold.

So scientist used evidence, analysis, and experiments to disprove alchemy. Therefore the correct answer is D.

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jeka94

Answer:

D.

Explanation:

For two organisms to breed successfully and produce viable offspring that are fertile, both must belong to the same species with the same number of chromosomes.

Postzygotic barrier often occur when two organisms of different species and chromosomes numbers mate. If successful, the hybrid they produce remain sterile. This is what happens when goat with chromosome number of 60, mates with sheep with chromosome number of 54.

Postzygotic barrier is responsible for the sterility of the hybrid they produce, as a result of difference in chromosome number between sheep and goat.

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3 years ago
Tylenol each stage during development?
BlackZzzverrR [31]

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3 years ago
Which of the following is a nucleotide found in DNA?
Sedaia [141]
The answer is A. Hope I helped!!
5 0
4 years ago
Read 2 more answers
At the isoelectric ph of an amino acid which has two pka values the net charge is ________.
Ierofanga [76]

The isoelectric pH has been defined as the electrically neutral molecule. "At the isoelectric pH of an amino acid that has two pKa values the net charge is <u>0</u>." Thus, option C is correct.

<h3>What is isoelectric pH?</h3>

The isoelectric pH has been defined as the potential of the hydrogen at which the molecule does not carry a net charge and is said to be electrically neutral. The amino acids at isoelectric pH do not carry a charge.

If there are two pKa values of the amino acid then the amino acid has zero charges as the amino acids are always neutral at the isoelectric point.

Therefore, in option C. the net charge is <u>zero</u>.

Learn more about isoelectric pH, here:

brainly.com/question/12996700

#SPJ1

Your question is incomplete, but most probably your full question was, At the isoelectric pH of an amino acid that has two pKa values the net charge is _______.

A) 0.5

B) 1

C) 0

D) -1

6 0
2 years ago
34:58
Lady bird [3.3K]
The answer to your question is electrons
6 0
3 years ago
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