GEOGRAPHY COLLEGE

Nitrogen (N2) is O cycled through the environment via the activity of bacteria. O a key component of life, integrated into our bodies directly from the air O now measured at 20.946% by volume in the homosphere. O a product of the radioactive decay of a form of potassium in the crust.

Answers

Answer 1
Answer:

Answer:

Option (1)

Explanation:

The bacterias plays an important role in the nitrogen cycle. The composition of nitrogen (N₂) in the atmosphere is approximately 78% by volume. The bacterias use this nitrogen to convert into ammonia (NH₃) and they are known as the nitrogen-fixing bacteria. After this, the nitrification process takes place in which the ammonia is transformed into nitrates (NO₃-) by bacteria and these nitrates are absorbed by the plants and are transported to their roots. Lastly, the denitrification process occurs, which converts the nitrate back to the nitrogen. This process takes place by those bacterias which eliminate the nitrates from the soil into the atmosphere forming nitrogen.

Thus, the correct answer is option (1).


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HIGH SCHOOL

Which evidence best supports scientists’ inferences about the origin and age of the universe?
(1) the existence of planets
(2) cosmic background radiation
(3) formation of star constellations
(4) similar composition of Earth and the Moon

Answers

The best answer for this question would be: 2. Cosmic Background Radiation The Cosmic Background Radiation are when the heat of a planet is measured by the left over heat of it. This is based on the “Big bang Theory” wherein the planets were formed because it was once a very hot radiation.
COLLEGE

The short-term effects of marijuana can include __________. A. increased anxiety B. decreased anxiety C. dulled sensory perception D. All of the above

Answers

Answer:

D. All of the above

Explanation:

These are all effects that marijuana can have on a person. The use of recreational marijuana has increased in recent years. In some states of the country, this action is legal. However, there is no consensus when it comes to the effects that marijuana has, particularly long-term. In the short-term, we know that marijuana can cause both increased and decreased anxiety, as well as dulled sensory perception. This is why it is advisable for people to avoid actions that require sharp senses, such as driving.

I believe it is C, dulled sensory perception. decreased anxiety is another effect, but it's more long term. 
MIDDLE SCHOOL

Why could global warming lead to the increase in the number and intensity of hurricanes ?

Answers

Global warming is, in simple terms, the earth's climate increasing in temperature. As this will result in sea temperatures rising, it leads to high-intensity hurricanes and increase in number of hurricanes. A hurricane is caused by evaporation of warm seawater. Climate change increases the warmth of seawater. As a heated environment causes ice caps to melt, resulting in sea levels rising, the chance of coastal surge being amplified increases.

Hurricanes draw their energy from deep below the ocean's surface and increased temperature means that there is more energy and it is even stronger.

MIDDLE SCHOOL

What is the body first line of defense against pathogens

Answers

Answer:

he body's first line of defense against pathogens uses mostly physical and chemical barriers such as sweat, skin, tears, mucus, stomach acid, and so on.

Explanation:

Answer:

mucous membranes

Explanation:

took test

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