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4 years ago

What evidence is there that the universe is expanding? Explain.

1 answer:

6 0

This is evidenced by Doppler shift effect. This is the phenomenon where waves that are coming from an object that is accelerating towards your direction are heard at a higher frequency than that of objects moving away from you. This is the same for light (which also has wave-like properties). When observing distant galaxies, astronomers discovered that they all showed to be redshift (change in the frequency of light towards red color). This means that all galaxies are moving away from each other because the universe is expanding.

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Why does the presence of a hair follicle have forensic importance?

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Answer:

Explanation:

Our hair follicles hold DNA just as do our finger nails, saliva, and blood.

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3 years ago

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When looking for evaluating sourses for paper should you avoid sources that disagree with yout thesis?

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No you should be looking for any source. A disagreeing source can be used to counter it

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3 years ago

The breakdown of food into molecules small enough to enter the blood stream is primarily accomplished by the ____.

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The best answer to fill in the blank would be B) Small intestine or the second option.

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What is the function of the cell membrane

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A cell membrane protects a cell from it's surroundings. The cell membrane controls the movement of substances from the outside and inside of cells and organelles.

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3 years ago

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Can somebody give me the answer for these...

labwork [276]

Answer:

1. Life cycle of a cell starts from

G1 phase - S phase (synthesise phase) - G2 phase - mitosis.

2. By mitosis bcoz it restore nucleo cytoplasmic ratio means ploidy of cell remain same.

3. Bcoz of transformation of normal cells into cancerous cells by Carcinogens present in tobacco.,drugs .etc

4 mitosis occurs in plants animals

Binary fission occurs in bacteria and other single celled organism.

Both give rise to two daughter cells.

5.sex cells (n) are produced by meiosis from gamete mother cells(2n).

6.in meiosis ploidy of cell become half

Means diploid cell form haploid cells

And 4 haploid daughters cells are formed.

In mitosis, ploidy of cell remain same

Means haploid form haploid and diploid form diploid.

1 cell form 2 daughter cells.

Hope this helps you.. Frnd ❤️

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4 years ago