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Mumz [18]
3 years ago
14

The mineral crystals in obsidian are too small to see without a microscope. This is because it _____.

Biology
2 answers:
saul85 [17]3 years ago
8 0

Answer:

cools fast

Explanation:

Serjik [45]3 years ago
7 0
<span>The mineral crystals in obsidian are too small to see without a microscope. This is because the rock cools so rapidly from magma that crystals barely have time to form. Obsidian is a normally happening volcanic glass framed as an extrusive molten shake. It is delivered when felsic magma expelled from a well of lava cools quickly with negligible precious stone development.</span>
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2. An unripe green fruit changes color when it ripens. The reason being:​
kirill115 [55]

Answer:

hope it helps

Explanation:

The green colour of the unripe fruit is due largely to the presence of chlorophylls, and the development of different colours during ripening is due to the disappearance of these pigments and the synthesis of carotenoids.

8 0
3 years ago
Which of the following is not a symptom of influenza?
aleksandr82 [10.1K]

Answer:Diarrhea

Explanation:

Influenza is a type of viral infection. It is commonly described as flu. Its symptoms are usually worse than normal cold.

Most of the symptoms of  flu are not observed during the starting few days and one may transfer it to another person before knowing about it.

The main symptoms of flu includes headache, dry cough, muscular aches. It does not includes diarrhea.

6 0
3 years ago
Round (R) is dominant over wrinkled (r) and
Dmitry [639]
R r
Y RY rY
y Ry ry

The 4 in the middle are the genotypes and the phenotypes are Round green, wrinkled green, round yellow, wrinkled yellow
3 0
3 years ago
During childbirth, the head of the baby pushes against the mother's cervix. A nerve impulse is transmitted to the brain which ca
Bingel [31]

Answer:a positive feedback

Explanation: positive feedback is a type of feedback mechanism employed by the body,in which an output is enhanced or acclerated.

In contrast to negative feedback where the body regulates it's internal conditions by reducing the effect of a stimuli,In positive feedback ,the body enhances the effect of the stimuli.

It is not common as negative feedback in homeostasis.

An example is the increasing release of oxytocin to promote contractions during childbirth,until the child is born.

Another example is the accumulation of blood platelet , in the site of blood vessels injury to

cause blood clotting.

3 0
3 years ago
Plz help asap<br> Due today and well I’m confused
dusya [7]

The Circulatory & Respiratory Systems Part 2

Directions: Answer these 2 prompts in a complete paragraph with topic & conclusion sentences, and relevant detail sentences in the body.

Rubric

5 Points

Answer is a complete paragraph with all necessary relevant details & correct use of key vocabulary.

4 Points

Answer is a complete paragraph with most necessary details & some key vocabulary

3 Points

May not be a complete paragraph, but includes most necessary details

2 Points

Some necessary details described

1 Point

Answer includes some related details

0 Points

No answer given or answer is incorrect/off topic

Beginning with the Superior Vena Cava (SVC) & Inferior Vena Cava (IVC) and ending with the aorta, explain the path that blood takes through the heart and lungs before returning to the body.

The Blood leaves the heart through the pulmonic and into the pulmonary artery and then to the lungs. Blood also leaves the heart through the aortic valve, into the aorta and to the body. This process results in blood flowing through the heart,lungs and body...

Fact if the circulatory or respiratory system were to fail, the other would fail as well, leading to death without medical intervention.  Explain why failure of the circulatory system would cause failure of the respiratory system & Explain why failure of the respiratory system would cause failure of the circulatory system.

Failure of the respiratory system would cause failure of the circulatory system because the respiratory system helps you breath and with you not breathing it would cause the circulatory system to fail because the breathing makes the blood flow through the circulatory system.

8 0
3 years ago
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