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ra1l [238]
2 years ago
8

What is the only evidence we can get from a star?

Biology
1 answer:
aalyn [17]2 years ago
3 0

Answer:

Stars are born within the clouds of dust and scattered throughout most galaxies. A familiar example of such as a dust cloud is the Orion Nebula. Turbulence deep within these clouds gives rise to knots with sufficient mass that the gas and dust can begin to collapse under its own gravitational attraction.

Explanation:

When it was dark these stars would light up the sky giving people light . In addition stars are very important because they make life on Earth. the most important is the Sun, because without that it wouldn't be life on Earth . Earth would just be a rock with ice.

PLEASE MARK ME AS BRAINLIEST!

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An organism with 24 chromosomes in each body cell will produce sex cells with __________ chromosomes
zhuklara [117]
12 chromosomes

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8 0
3 years ago
Density-dependent inhibition is a phenomenon in which crowded cells stop dividing at some optimal density and location. This phe
Brilliant_brown [7]

Answer:

This statement is true

Explanation:

Different substances such as growth factors and nutrients affect the mechanism of density-dependent inhibition of growth as cells become more and more numerous

8 0
3 years ago
Explain how the terms oxidation and reduction apply even when there is only a partial shift of electrons between atoms linked by
aliina [53]

Explanation:

In a covalent bond, there is sharing of the donated electron by two atomic species having very small electronegative differences between them.

Oxidation is the loss of electrons by a specie and it usually lead to an increase in oxidation number.

Reduction is the gain of electrons by a specie. It leads to a lower oxidation number.

Since there is no actual loss of gain of electrons in a covalent body, the electronegativiy is at work.

Electronegativity is the ability of a specie to draw the shared electrons more to itself in a covalent bond.

  • Between two atoms bonded covalently, the more electronegative specie draws the electrons closer.
  • This leaves a partial negative charge on it.
  • The other electron then becomes partially positively charged.
  • We can then say, the more electronegative specie undergoes reduction.
  • The less electronegative one undergoes oxidation.

learn more:

Covalent bond brainly.com/question/3064597

Oxidation and reduction brainly.com/question/2278247

#learnwithBrainly

5 0
3 years ago
Osmosis and tonicity
Sergio039 [100]

The blood cells likely placed in a "hypotonic solution".

<u>Option: A</u>

<u>Explanation:</u>

When human blood cells are immersed in a solution with a low concentration of solute than is present in cells, osmosis allows water to pass through the cells, allowing the cells to get swollen; such a fluid is hypotonic to the cells. But when held in a solution with a greater concentration of solute, osmosis allows water to pass out of the cell, the cell is smaller and crenated in form; then a solution is hypertonic to the cells.

Healthcare facilities preserve human blood cells in a plasma solution that has the proper salt and protein ratios. Such solution is formulated to be mildly hypertonic to the red cells, thus maintaining the integrity of the cells and avoiding hemolysis.

8 0
3 years ago
Please answer this for me. ❤️
mestny [16]

Answer:

hope it's right

Explanation:

1)Cerebrum: is the largest part of the brain and is composed of right and left hemispheres. It performs higher functions like interpreting touch, vision and hearing, as well as speech, reasoning, emotions, learning, and fine control of movement.

2)Cerebellum: is located under the cerebrum. The cerebellum receives information from the sensory systems, the spinal cord, and other parts of the brain and then regulates motor movements. The cerebellum coordinates voluntary movements such as posture, balance, coordination, and speech, resulting in smooth and balanced muscular activity.

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