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Stels [109]
3 years ago
14

A individual with Down syndrome (trisomy 21) has how many chromosomes

Biology
1 answer:
meriva3 years ago
5 0
The individual will have 42 chromosome
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According to the chart, which substance has the lowest OH- concentration?
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The correct answer is option (B) lemon juice.

pH refers to the logarithmic scale used to indicate the acidity or basicity of an aqueous solution. It is the negative of the base 10 logarithm of the activity of the hydrogen ion. Solutions with a pH less that 7 are considered acidic and the solutions with a pH greater that 7 are considered to be basic. A pH of 7 is neither an acid nor a base and is considered neutral.

An acid has a high concentration of hydrogen ions (H+)  and a base has a low concentration of hydrogen ions. Higher the hydrogen ion concentration, pH is acidic. Among the given substances, lemon juice has a pH of 2, urine has a pH of 6, tomato juice has a pH of 4 and black coffee has a pH of 5.  Since lemon juice has a pH of 2, it has the lowest –OH ion concentration.

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What is active transport?​
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3 years ago
The human body does not constantly lose water through _______.
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The human body does not constantly lose water through hydration and circulation. When someone is hydrated, he is drinking an enough amount of water to sustain the needs of his body. Circulation then helps this in distributing the water in different parts of the body.

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Can someone give me "detailed" notes on the main function of chloroplasts <br> 75 POINTS if correct
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They convert light energy into relatively stable chemical energy via the photosynthetic process.

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Hope this helps,

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