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3 years ago

Which breast condition is a malignant disorder? mammary duct ectasia fibroadenoma papilloma carcinoma?

1 answer:

5 0

The correct answer is carcinoma. Mammary duct ectasia, papilloma and fibroadenoma are benign conditions of the breast. Breast carcinoma is malign cancer that develops from breast tissue. Breast cancer is the most common cancer among women which can be the result of genetic or lifestyle factors. Invasive ductal carcinoma (IDC) is the most common type of breast cancer.

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What kind of molecule is shown in the diagram below?

Leona [35]

Answer: Lipid for Apex

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3 years ago

Read 2 more answers

b. In 1979, the estimated elephant population was 1.3 million and in 2007 it was 640,000. By approximately what percentage did t

saveliy_v [14]

Answer:

The initial amount, 1.3 million = 1,300,000 is the 100%.

now, 640,000 is a given percentage (lower than 100%) of that.

How we can find it?

suppose that 640,000 represents an x%.

Then we have that the quotient between the actual quantities and the percentages must be the same

(640,000/1,300,000) = x%/100%

x% = (640,000/1,300,000)*100% = 49.23%

Then the percentage declined is:

100% - 49.23% = 50.77%

The other question can not be answered with the given information.

4 0

3 years ago

Which of the following statements is true?

Lelu [443]

Answer:

The true statement is: "Spring tides are the highest, while neap tides are the lowest."

Explanation:

The range of difference in the level of water between high and low tide is always larger in spring tide.

Neap tides are the moderate tides. It does not have huge difference in higher and low tides because the bulging of the ocean ( by the sun) balances the bulge of the ocean caused by the moon.
This balance is not found in spring tides that is the main reason for spring tides to have the highest level for both higher and lower tides.

8 0

3 years ago

According to the nebular theory, a solar system begins when an interstellar cloud, containing approximately 75% hydrogen, 25% he

azamat

"Gravitational attraction" is initially responsible for the formation of the clumps of matter within this interstellar cloud.

Answer: Option C

Explanation:

About 4.6 billion years ago, the solar systems were a bunch of gases and dusts, referred to solar nebula. Gravity squeezed the material as it started to rotate, creating the sun at the middle of the fog.

The rest of the material began to accumulate with the sunrise. The smaller particles moved together to form larger particles that were connected by gravity. As lumps develop, gravity increases and turns into kinetic energy of moving particles that collide and produce heat.

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3 years ago

The human genome contains about 3 billion base pairs. During the first cell division after fertilization of a human embryo, S ph

Nataly [62]

Answer:

5556

Explanation:

If a DNA polymerase synthesizes in average 50 nucleotides/second, that means that in three hours (10800 seconds) it synthesizes about 540000 nucleotides.

However, if the human genome is composed of 3000000000 (3 billion) base pairs (nucleotids), the minimum number of DNA polymerases (working in the same number of origins of replication) to finish the duplication of all the genome in three hours is 5555,5. (3000000000/540000). As we know there is no half polymerase, so we round to 5556.

5556 molecules of DNA polymerases acting on 5556 origins of replication are needed.

7 0

3 years ago

Read 2 more answers