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bezimeni [28]
2 years ago
7

If blood pressure of a young boy is 120/80 the number 120 is measured when________.

Biology
2 answers:
mars1129 [50]2 years ago
6 0
Systolic because we always do systolic / dystolic
Sladkaya [172]2 years ago
5 0

Answer:

systolic

Explanation:

how much pressure is in your arteries

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Cytosine makes up 24% of the nucleotides in a sample of DNA from an organism.
Alchen [17]

Answer:

26%

Explanation:

if cytosine makes up 24%, then guanine also makes up 24%.

add these to get 48%.

subtract that from 100% to get a remaining 52%

then split the 52% between adenine and thymine to tell you that 26% is thymine

7 0
3 years ago
The magnets point North when the Earth's magnetic field has (p2)<br><br>need some help :)​
Natali5045456 [20]
<h2><u>EARTH'S MAGNETIC FIELD</u></h2>

The magnets point North when the Earth's magnetic field has?

<h2><u>ANSWER</u></h2>

I think the best answer for this question is Magnetic Reversal or Geomagnetic Reversal.

In geomagnetism, the term "geomagnetic reversal" also known as 'flip', is the process by which the North pole becomes South pole and the South pole transforms into North pole.

<h2><u>THE MAGNETIC REVERSAL</u></h2>

The reversals happen on rare occasions when iron molecules start moving towards the opposite direction as other iron molecules around them within the Earth's spinning outer core.

7 0
2 years ago
Darker skin is more prevalent in high-UV areas. Dr. Nina Jablonski proposed a hypothesis to explain the selective pressure for d
skad [1K]

The answer is; the melanin in darkly pigmented skin protects DNA from UV radiation, and UV radiation can cause skin cancer

In Africa, due to its equatorial latitude location, receives direct sunlight at more or less 90 degrees most of the year. These highly concentrated rays increase the UV radiation exposure  that can cause damage to cell DNA. Selection pressure, therefore, favored individuals with high melanin concentrations that protect against UV. Therefore population evolved towards high melanin densities in the skin.


7 0
3 years ago
What two body systems use the heart as an organ?
Troyanec [42]

Answer:

cardiovascular and blood vessals

Explanation:

4 0
3 years ago
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Which basic type of tissue makes up boundary of the stomach?
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The folds in the stomach lining are called rugae. On these rugae, you will find a thin line of mucous which helps protect the stomach lining. The innermost layer is called Simple Columnar Epithelium.
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