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mote1985 [20]
3 years ago
11

Which statement best explains why the Earth's gravity is able to hold the moon in orbit?

Biology
1 answer:
katen-ka-za [31]3 years ago
5 0

Answer:

The gravitational force

Explanation:

The strong gravitational force pulls it towards the earth. Also the moon causes the tides to push and pull.

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Kazeer [188]

Answer:

the last one which I'm guessing is d......cause it kinda messed up

3 0
2 years ago
Olympic athletes train in Colorado Springs, Colorado because this location is at high altitude and near the 14,000 foot Pikes Pe
Stels [109]

Answer:

A: Oxygen levels are low and, therefore, more red blood cells are produced, giving the athletes an advantage when competing at lower altitudes.

Explanation:

<em>At high altitudes, the partial pressure of oxygen is lower compared to lower altitudes</em>. The body system try to adjust to lower oxygen level by undergoing several physiological changes. Depending on the duration spent in high altitude, the body can either try to adjust in the short term or acclimatize for a longer term.

One of the processes the body undergoes during acclimatization is an increase in red blood cell production. The kidney secretes erythropotein in response to inadequate oxygen in body tissues, and this makes the liver to increase erythrocyte production.

The increase in red blood cell production correspondingly increases the oxygen-carrying capacity of the blood as a result of increased hemoglobin. This condition persists for a few weeks even after the body returns to lower altitude where oxygen is adequate. Increased oxygen capacity means the rate of energy production (through respiration) within the body will also increase

<em>Hence, those who acclimatize to high altitude usually experience increased capillary density, tissue perfusion and improved athletic performance at lower altitudes. </em>

The correct option is A.

3 0
3 years ago
Read the article and use the information to answer the following questions. H1N1 Influenza How is the H1N1 influenza virus sprea
soldier1979 [14.2K]

Answer:

The influenza H1N1 virus is transmitted through saliva droplets and mucus from sick people, who by sneezing or coughing without covering their mouth and nose adequately, leave the virus in the air or on their hands, infecting then the objects they touch. As a rare occurrence, a person can become infected with the flu by touching a surface or object contaminated with the influenza virus and then touching the mouth, nose, or eyes.

Pigs sometimes transmit influenza H1N1 virus to people, primarily pig farmers and veterinarians.

6 0
3 years ago
Why are there more species in Family Ursidae than there are in Genus Ursus?
Olin [163]

Answer:

Hopefully this helps! If it doesn't, let me know!

Explanation:

The family Ursidae contains the genus Ursus, which includes 4 species of bear, the brown bears, the polar bear and the two species of black bear.

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In humans, three weeks after conception a structure known as the _____ forms that will continue to develop into the central nerv
Ann [662]

The answer is a neural tube.

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3 years ago
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