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Pepsi [2]
2 years ago
7

What is the variable a scientist changes on purpose?

Biology
1 answer:
irina1246 [14]2 years ago
5 0
Independent Variable
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Which of the following statements about magnesium atoms is NOT correct? 1. All magnesium atoms have the same number of protons.
Fantom [35]

Answer:

5. All magnesium atoms have the same number of neutrons

Explanation:

Magnesium (Mg) is a chemical element. Its atomic number (Z) is 12 (number of protons in the nucleus of the Mg atom).

The Magnesium has three stable isotopes: 24Mg, 25Mg and 26Mg. All these isoforms have 12 protons in their atoms (same atomic number), however they  vary in the mass number of the atom (M).

The mass number of the atom (M) is equal to the sum of protons and neutrons in the nucleus.

Based on this information we can know how many neutrons each isotope has

24 Mg = 12 protones + 12 neutrons

25Mg = 12 protones + 13 neutrons

26Mg = 12 protones + 14 neutrons

In this way we conclude that <u>not all magnesium atoms have the same number of neutrons</u>

5 0
3 years ago
100 points and brainleist
solmaris [256]

Answer: DNA

Explanation:

A chromosome is a thread-like material with a long structure found in the cell nucleus. It mainly contains DNA and proteins. Due to the presence of DNA in chromosomes, it carries several genes.

The total number of chromosomes in human cell is 46: 44 are non-sex chromosomes while 2 are sex chromosomes

7 0
3 years ago
Read 2 more answers
How many cells are there in the human body and how many microorganisms are there in a human body?
nydimaria [60]
As of 2014, it was often reported in popular media and in the scientific literature that there are about 10<span> times as many microbial cells in the human body than there are human cells; this figure was based on estimates that the human microbiome includes around </span>100 trillion<span> bacterial cells and an adult human</span>
5 0
3 years ago
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What is a trait called when it is controlled by more than one gene? O A. Adaptive O B. Disruptive O C. Polygenic O D. Flowing​
Nady [450]

Answer:

The answer is C. Polygenic

3 0
3 years ago
8. The letter p in the term pH stands for the German word
pychu [463]

Answer:

Here's what I get  

Explanation:

Per the above explanation, pH means "power of hydrogen ions."

The concentration of hydrogen ions is a measure of the acidity of a solution. A higher concentration represents a more acidic solution.

The definition of pH is

pH = -log[H⁺]

Thus, pH is a measure of the hydrogen ion concentration.

The more negative the pH, the greater the Potenz of hydrogen ions.

6 0
3 years ago
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