How does the cardiovascular system helps the body get rid of carbon dioxide???

Species a diverged from species b 60,000 years ago. On a particular gene, they have 15 nucleotide differences. How many nucleoti

a_sh-v [17]

The given question says that b species diverged around 60,000 year ago from species a. Since the divergence, they have a nucleotide difference of 15 nucleotide.

We need to find out the nucleotide difference in another 240,000 year, which means a total of 300,000 year since divergence.

The nucleotide difference in 60,000 years = 15 nucleotide.

The nucleotide difference in 1 year = $\frac{15}{60,000}$ nucleotide.

The nucleotide difference in 300,000 years = $\frac{15}{60,000}\times 300,000$ nucleotide.

The nucleotide difference in 300,000 years = 75 nucleotide.

Hence, after another 240,000 years or 300,000 years since divergence, the species and species b would show a difference of 75 nucleotide.

In another 240,000 years, there would be 60 nucleotide difference, as 15 of the nucleotide are already different in initial 60,000 years from the total of 75 nucleotide difference in 300,000 years. So, 60 (75-15) nucleotide difference would be observed in next 240,000 years.

4 0

3 years ago

How will a punctured lung affect your ability to inspire?

Allisa [31]

1) Pneumothorax in this case; a spontaneous pneumothorax can be life threatening cause the lung will eventually cause vacuum used by the lung to fill with air, and as you constantly expand your lung it decreases and collapses. So C is going to be the answer.

2) Acetylcholine is the hormone responsible for the "Rest and digest". It is the direct opposite of the Fight and Flight reaction which is marked in Bronchodilation, Increased HR, and increased BP. B

3) Secretin is responsible for stimulating the release of bile by the liver. Secretin is released by the duodenum, the junction of the stomach and small intestines. B

7 0

3 years ago

What’s the difference between a clementine and a tangerine?

ladessa [460]

Answer:

A tangerine is a fruit and Clementine is a character from the walking dead the game.

Explanation:

7 0

3 years ago

Steps that occur in the scientific process are listed below. What is the correct order in which the steps should occur? (put the

vagabundo [1.1K]

Make an observation

Form a hypothesis

conduct an experiment

analyze the results

Draw a conclusion

4 0

3 years ago

Compare and contrast light microscopes, scanning electron microscopes, and transmission electron microscopes. Sort each statemen

podryga [215]

Answer:

Light microscope:

use a beam of light to produce magnified images
can be used to examine living cells and tissues

Scanning electron microscope:

use a beam of electrons to produce magnified images
can be used to examine DNA
can be used to examine cells

Transmission electron microscope:

use a beam of electrons to produce magnified images
can be used to examine DNA
can be used to examine cells

Explanation:

Light microscope: is a commonly used microscope also known as compound microscope. Magnifies images from 40X upto 1000X. It uses ray of visible light to produce a magnified image. The light microscope can be used to view specimen of both living and dead cells or tissues. However, it doesn't give a detailed view of a specimen like electron microscope.

Scanning electron microscope: It uses electron beam as an illuminating source. It has a much higher resolving power than light microscope because it uses electrons instead of light. It magnifies object upto 500000 times the actual size. Internal structures can also be viewed. However, only dead specimen can be used because the beam of electrons can kill the cells. They are of two types:

Scanning electron microscope(SEM): an electron beam passes over the specimen's surface and displaces electrons which are then focused on a screen to form an image. Images appear in 3-D
Transmission electron microscope: electromagnets magnify the image by passing beam of electrons through a thin specimen. Images appear in 2-D

7 0

3 years ago