How have humans changed the global nitrogen cycle?

A. They have greatly decreased the amount of fixed nitrogen.
B. They have raised the speed at which nitrogen travels through the
cycle.
C. They have lowered the speed at which nitrogen travels through the
cycle.
D. They have greatly increased the amount of fixed nitrogen.

Answers

Answer 1

Answer:

D

Explanation:

Humans activities, such as making fertilizers and burning fossil fuels, have significantly altered the amount of fixed nitrogen in the Earth's ecosystems.


Related Questions

For rabbits, having long hair is an advantage over having short hair in environments with?
O high levels of rain
a large number of competitors
low temperatures
O few predators

Answers

Answer:low temps

Explanation:

For rabbits, having long hair is an advantage over having short hair in environments with low temperatures. Thus, the correct option is C.

What is the Environment?

The Environment may be defined as anything which is present in the surrounding of living entities.

The Long hair of rabbits provides them resistance against lower temperatures. Long hair maintains the warmth of rabbits in colder temperatures.

Therefore, the correct option for this question is C.

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Which is an example of a biotic factor
A water
B rocks
C) soil
D) trees

Answers

Answer:

d trees

Explanation:

Answer:

D

Explanation:

because a biotic factor is living, while an abiotic factor is non-living.

hope this helps

have a great day/night

Which of the following organ systems perform interrelated functions within the human body?
I. excretory and digestive
II. circulatory and respiratory
III. muscular and nervous
IV. skeletal and muscular

A.IV only
B. I,II, and IV only
C. I, II, III, and IV
D.II and IV only

Answers

Answer:

B

Explanation:

cause it interacts with you hear pumps and helps the body stay alive

Which process produces two genetically identical somatic cells?
A. Mitosis

B. Meiosis

Answers

Answer:

mitosis make somatic cells

Answer:

A. Mitosis

Explanation:

Mitosis produces two genetically identical somatic cells.

Tides on Earth are influenced by

both the moon and the sun
the sun only
the moon only
neither the moon nor the sun​

Answers

Answer:

The moon only

Explanation:

The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon. These bulges of water are high tides.

what does it mean when the pH increases or decreases​

Answers

Answer:

how acidic or basic a solution is

Explanation:

the lower the pH level the more acidic and the hight the pH level the more basic it is

which two processes would most likely cause metamorphic rocks to change into sediments

Answers

compaction and erosion

help please
Two children and their dog are outside. The children are skating, and the dog is eating. It begins to rain, and the children and dog rush inside so quickly that it causes them to breathe more rapidly. When they are inside, the children dry their hair using towels, and the dog dries it's fur by shaking it's fur.
Look at the list of actions below:
1. The children skating
2. The dog eating
3. The children breathing more rapidly
4. The dog breathing more rapidly
5. The children using towels to dry their hair
6. The dog shaking it's fur to dry it's fur
Which actions best represent inherited behaviors?
A - 2,3,4,6
B - 2,4,6
C - 1,5
D - 1,2,3,4,5,6

Answers

Answer:

The answer is A because the other actions the child thinks of doing or was taught to do

Answer:

D - 1,2,3,4,5,6.

The what
system proyides structure to the body and protects
internal organs.

Answers

Answer:

Skeletal System

Explanation:

The skeletal system works as a support structure for your body. It gives the body its shape, allows movement, makes blood cells, provides protection for organs and stores minerals.

Why is the elimination of feaces not an excretory process?​

Answers

Answer:

Feaces is a product of egestion. It is not directly formed from the major organs responsible for excretion (liver, kidneys, lungs and skin) and hence is not a result of metabolic reactions. That is why, feaces are not an excretory product.

Explanation:

TWO evidence of global warming in South Africa​

Answers

Answer:

Observable effects of climate change on water resources in Africa include: flooding, drought, change in distribution of rainfall, drying-up of rivers, melting of glaciers and the receding of bodies of water.

Explanation:

thank me later

What gas in the atmosphere reacts with sulfur dioxide to create sulfur trioxide?
O nitrogen
o hydrogen
O acid rain
oxygen

Answers

o hydrogen, hoped this helped!
Hydrogen:) I hope it help

Sinkholes and caves are an example of:
A. Climate Change
B. Mechanical Weathering
C. Sediment Deposition
D. Karst Topography

Answers

Answer:

I think it's D. Karst Topography

Explanation:

Karst is a topography formed from the dissolution of soluble rocks such as limestone, dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions.

What is the measured output force of a pulley system if the Mechanical Advantage is 0.48 and measured input force is 10N?

Answers

Answer:

Output force is 4.8 N

Explanation:

A pulley is a simple machine made of a grooved wheel with a rope or cable wrapped around it. Pulleys are used in the transmission of energy or motion.

The input force is also known as the applied force while the output force is the force exerted on an object by a simple machine.

The mechanical advantage of a pulley is the ratio of the output force to the input force.

Mechanical advantage = output force / input force

Substituting:

0.48 = output force / 10

Output force = 4.8 N

how is cholera more of a result of politics, socio-economic conditions and infrastructure than biology?

Answers

Answer: Vibrio cholerae is a natural inhabitant of the aquatic environment, which with ... infrastructures aiding in mixing of overflowing sewers with flood waters, result in an ... temperature and likelihood of an outbreak of cholera were then determined. ... Figure 4 shows that about 50% or more cholera outbreaks

Explanation:

Ribosomes are only found in prokaryotes.
True
False

Answers

Answer:

False

Explanation:

They're also found in eukaryotes.

true it only can be found in prokaryotes

Is lettuce a leaf plant?

Answers

Answer:

yes.

Explanation:

Yes. Why? Because it is

When warm air exists above cold air, thereby trapping the cold air, this is referred to as a __________

Question 2 options:

Altitude inversion


Temperature inversion


Convection cell


Heat gradient

Answers

Answer:

I think it's temperature inversion

But not sure....

Answer:

temperature inversion

Ferns have vascular tissue, an adaptation to life on land, but they have an ancestral reproductive trait that tends to limit them to moist habitats. What is it?

Answers

Answer:

The correct answer is - flagellated sperm.

Explanation:

In ancestral trait that is flagellated sperm in ferns that were limited to moist habitat has sperms that must swim to the eggs. This is why ferns often require splashing water for the movement of sperm to points near female gametangia during reproduction.

Fern now adapted the vascular system to get life on the life and they are not limited to the water bodies, however, flagellated sperm is the ancestral reproductive trait.

The chart lists coordinates that describe the locations of
four cities.
City
Location
Kinshasa, Democratic Republic of the Congo 4° S/15° E
Addis Ababa, Ethiopia
9°N/39°E
Lagos, Nigeria
6°N/3° E
Oran, Algeria
35° N/0°W
Which city listed in the chart is farthest south?

Answers

Answer:

c.

Explanation:

i took the test

Two students are making models of
cells in plants and animals. They
choose an expanding and shrinking
rubber band to show how one type of
cell acts. Which type of cell does the
A
rubber band best model?
O A. Muscle cells
O B. Epithelial cells
O C. Dermal cells
O D. Guard cells
O E. Nerve cells
HINT
SUBMIT

Answers

Answer:

A. Muscle cell because muscle are actualy the most attractive cells in the body most especially men/boyz

Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar.
The following chemical equation shows the combustion of ethane. Balance the equation by filling in the coefficients.


C2H6 +
O2 →
CO2 +
H2O

Answers

Answer:

2,7. 4,6

Explanation:

2 C2H6. +. 7O2. ==. 4. CO2. +. 6 H2O

Note. In such questions balance C first then H and finally O

It will be easier

Người ta có thể tạo ra những cơ thể mới có kg khác với dạng bố mẹ sẵn có. Em hãy đề xuất 4 cách để tạo ra cá thể như vậy

Answers

Answer:

plz ask questions in English

Where is the DNA found in Eukaryotic cells?
A. nucleus

B. rough ER

C. mitochondria

Answers

Answer:

A NUCLEUS

Explanation:

Answer:

A. nucleus

Explanation:

The DNA is found in the nucleus of the Eukaryotic cells.

Leukemia is a type of cancer that prevents a person from being able to make new blood cells. What part of the body develops this kind of cancer? O A. Kidney O B. Brain O C. Liver O D. Bone marrow SUBMIT PREVIOUS. ​

Answers

Answer:

D. Bone

Explanation:

Leukemia, a type of cancer found in your blood and bone marrow, is caused by the rapid production of abnormal white blood cells. The high number of abnormal white blood cells are not able to fight infection, and they impair the ability of the bone marrow to produce red blood cells and platelets.

When he discovered that blood is pumped from the heart to the body, and back to the heart, ________ had a difficult time getting people to accept his discovery because it went against the ancient teachings of _______.

Answers

Answer:

1 - William Harvey

2 - Galen

Explanation:

Galen, who postulated that blood was produced continuously in the liver and absorbed by the body (not recirculated), served as the Roman emperor's personal physician. For 1500 years, his theories about human anatomy went unquestioned until Harvey's proposal in 1628.

When he discovered that blood is pumped from the heart to the body, and back to the heart, William Harvey had a difficult time getting people to accept his discovery because it went against the ancient teachings of  Galen.

What is the composition of blood ?

blood is a fluid connective tissue contain blood cells and an plasma.

The major functions include transportation and providing immunity and protection.

The major components include plasma primary constituent of blood contain 55 percent of blood volume. It is made up of water, salts, proteins, and blood cells.

Red Blood Cells which determine blood type, biconcave in shape, enucleated contain millions of hemoglobin molecules.

White Blood Cells act as defensive cell in the immune system and lymphatic system against infection.

Platelets  are formed from pieces of cells present in the bone marrow called megakaryocytes.

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In which process do homologous chromosomes pair up?

A. Mitosis

B. Meiosis

Answers

Answer:

the answer is meiosis

Explanation:

in miosis it happens in prophase I.

Answer:

B. Meiosis

Explanation:

Homologous chromosomes pair up in meiosis.

An example of a communicable disease is

Answers

Answer:

An example of a communicable disease could be influenza. A communicable disease is just a disease caused by virus or bacteria that spreads from person to person.

I need help with this please !!

Answers

fbjfjfjfjfjfjfjfjfbbfbfbfjfjfjjfjfjf
The correct answer is C

What were some number of possible solutions to air pollution?

Answers

The most basic solution for air pollution is to move away from fossil fuels, replacing them with alternative energies like solar, wind and geothermal. Producing clean energy is crucial. But equally important is to reduce our consumption of energy by adopting responsible habits and using more efficient devices.
move away from fossil fuels, use reusable sources of energy such as solar
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