what is the approximate percentage of total fixed nitrogen attributed to human activities?

Answers

Answer 1

Of the annual global total of fixed nitrogen, human activities account for roughly 45%.

Nitrogen fixation is the global amount of nitrogen that gets assimilated by any living organism into another organic compound. The organic compound can be ammonia or nitrogen ions.

Of the total global annual nitrogen fixation, humans account for a great amount. The current estimation is that humans cause 45% of the nitrogen fixation annually. The leading causes of this high rate are the burning of fossil fuels and increased agricultural fertilizer use.

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Related Questions

Os pavões são animais orgulhosos?

Answers

Answer:

peacocks are proud animals say

Explanation:

blood cerculation system​

Answers

Answer:

The circulatory system, also called the cardiovascular system or the vascular system, is an organ system that permits blood to circulate and transport nutrients, oxygen, carbon dioxide, hormones

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Help me pls. ‼️‼️‼️‼️‼️In your own words explain the concept of sea floor spreading

Answers

Answer:

No biologist but this is what my teacher told the class during the weel

Explanation:

Organisms would expand due to the movement of tectonic plates while bacteria would settle there

Please help me! " Section 1 Biodiversity (continued)

Main Idea

Details

Summarize why species should be preserved as a possible source

of useful genes.

The Importance

of Biodiversity

I found this information

on page

Medicine

Agriculture

Organisms that

might have value

include

These organisms

someday might be

useful as

Identify resources and services that a healthy biosphere provides to

people.

Services

Resources

1.

1.

2.

2.

3.

3.

4.

4.

Organize how humans are dependent on plants and animals by

describing two ways that you use products of each.

Products of Animals

Products of Plants

Copyright © Glencoe/McGraw-Hill, a division of The McGraw Hill Companies, Inc.

SUMMARIZE

Explain how the health of the biosphere impacts the health of people.

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Answer:Plants and animals maintain the health of an ecosystem. When a species becomes endangered, it's a sign that an ecosystem is out of balance. ... The conservation of endangered species, and restoring balance to the world's ecosystems, is vital for humans, too.

Explanation:

Which of the following correctly describes how the chemical equation for cellular respiration would differ from a chemical equation for photosynthesis?

Answers

Answer:

Uh not seeing an option but I hope this helps

The products of one process are the reactants of the other. Notice that the equation for cellular respiration is the direct opposite of photosynthesis: Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O. Photosynthesis: 6CO2 + 6H2O → C6H12O6+ 6O.

How does biotic carbon change to the abiotic form of carbon

Answers

Answer:

A balanced carbon cycle is essential. Carbon is a major component in carbohydrates, fats and proteins. The carbon cycle involves the exchange of carbon between living organisms (biotic) and their atmosphere (abiotic). In the carbon cycle, carbon is constantly removed from, and returned to, the environment.

Explanation:

What step ends translation?
A. addition of an amino acid into the growing peptide chain
B. separation of mRNA from the ribosome when a stop codon is reached
C. detachment of tRNAs from the ribosome
D. connection of tRNA anticodons with codons on mRNA

Answers

Answer:

addition of amino acid into the growing peptide chain

The plant in a is a control plant. explane this statment

Answers

Answer:

sgxycghshdgfjdyshgxhfjzgdz

can someone send me the gizmo coral reefs 1 answer key..

Answers

Answer:

Explanation:

No but of u ask the questions I can help

the age of a woolly mammoth can be determined by examining what?

Answers

Answer:

examining the tusks, bones, teeth, (carbon levels in tissues depends)

Explanation:

Carbon-14 can be used to date the remains of dead organisms because all living things use carbon to build tissue.

The biological age of mammoths (also known as the "age at death") is usually estimated by comparison to correlations between the biological age and the wear stages of grinding teeth in extant elephants. As tusks grow, they continually incorporate ingested strontium (Sr), and the incremental record of strontium isotope ratios (87Sr/86Sr) in tusks and teeth can be used to investigate proboscidean movements

scrutinizing the bones, teeth, and tusks (carbon levels in tissues depends)

What are Mammoth?

All living things need carbon to create tissue, making carbon-14 a useful tool for dating the remains of deceased species.

Mammoths' biological age, also known as the "age at death," is typically calculated by comparing it to correlations between that age and the phases of tooth wear in living elephants.

The incremental record of strontium isotope ratios (87Sr/86Sr) in tusks and teeth can be used to study proboscidean movements as tusks continuously integrate ingested strontium (Sr).

Therefore, scrutinizing the bones, teeth, and tusks (carbon levels in tissues depends).

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Michelle and George are studying the forces and motion of a 0.8-kg low friction cart on a horizontal table. They use a spring scale to exert different amounts of horizontal pulling force on the cart and measure the acceleration of the cart for each pulling force. The measurements of each set of pulling force and acceleration are displayed in the table below. If friction is much weaker than the pulling force, which of the following is the best fit for the missing pulling force in the table?

Answers

Table 1: The horizontal pulling forces (F) and resulting acceleration (a) for the cart.



The cart experiences no motion when there is 0.1 N of horizontal force, so F=0 in this case. When one uses Newton's Second Law to find the acceleration caused by each force, it becomes clear that every row in the chart represents a horizontal force of approximately F=20 N. The best fit for the missing value is F=-30N.

what part of the cellular respiration pathway is affected by cyanide?

Answers

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The ferric ions' cytochrome oxidase in the mitochondria makes a reversible chemical bond with cyanide. By preventing the conversion of oxygen to water, this essentially stops cellular respiration.

What is the role of cyanide in cellular respiration?

Heme-containing proteins include Fe3+, which cyanide binds to. As a result, the electron transport chain's terminal cytochrome complex IV is inhibited.

Cyanide's blockade of complex IV depletes ATP, which leads to cell death.

Because the molecules are so small and can disperse quickly throughout the entire body, cyanide can kill so quickly by damaging all major organs and tissues in a short period of time.

Therefore, electron transport system is affected by cyanide in cellular respiration.

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21. Three different processes are occurring in the drawing below. Name each process and describe it.

Answers

The three different processes that are occurring in the above drawing are:

1. Process A: Diffusion.

2. Process B: Facilitated diffusion.

3. Process C: Active transport.

Cell transport refers to the movement of ions, molecules, or substances across the cell membrane, either into or out of the cells of a living organism.

From the above diagram, the three (3) different processes that are occurring are:

1. Process A: Diffusion.

Diffusion refers to the movement of gas molecules from a region of high concentration (top) to a region of lower concentration (bottom) until an equilibrium is attained or reached.

2. Process B: Facilitated diffusion.

Facilitated diffusion refers to the movement of substances or gas molecules across a cell membrane from a region of high concentration (top) to a region of lower concentration (bottom), especially through the help of transport protein.

3. Process C: Active transport.

Active transport involves the movement of substances across the cell membrane from a region of lower concentration to a region of higher concentration, against a concentration gradient and in the presence of oxygen.  

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What is the process of double pump?

Answers

Answer:

Your heart is a single organ, but it acts as a double pump. The first pump carries oxygen-poor blood to your lungs, where it unloads carbon dioxide and picks up oxygen. ... The second pump delivers oxygen-rich blood to every part of your body. Blood needing more oxygen is sent back to the heart to begin the cycle again.

Explanation:

How is an angular unconformity different then a disconformity?

Answers

Answer:

Angular unconformity represents the folding of an old sedimentary sequence, planing of the tilted strata by erosion, and the deposition of a young sedimentary sequence on the old truncated strata. ... Disconformity refers to an unconformity in which the beds above and below the surface are parallel.

What physical quantity does the symbol V represent?

Answers

Answer:

voltage

Explanation:

help please!! will mark brainliest ​

Answers

Answer is the first option Place a metal paper clip on a table and slowly bring each electromagnet closer to the paper clip to see which can attract the paper clip from a greater distance.

I don't know why but I find your questions a bit too easy..

What do adenine, ctyosine, guanine, thymine, and uracil have in common

Answers

Adenine and guanine have a fused-ring skeletal structure derived of purine, hence they are called purine bases. ... Similarly, the simple-ring structure of cytosine, uracil, and thymine is derived of pyrimidine, so those three bases are called the pyrimidine bases.

Explain the process of evolution by natural
selection.

Answers

Answer:

Natural selection is a process where organisms that are better adapted to an environment will survive and reproduce. This means that the advantageous alleles of this variant organism are passed on to offspring. Over many generations, the process of natural selection leads to evolution occurring.

Explanation:

this should give you your answer but if not please tell me

in an otherwise normal cell, what happens if one mistake is made during dna replication?

Answers

Answer:

Most mistakes are corrected, and if they are not, they may result in a mutation, defined as a permanent change in the DNA sequence. Mutations can be of many types, such as substitution, deletion, insertion, and trinucleotide repeat expansions. Mutations in repair genes may lead to serious consequences such as cancer.

Explanation:

need an answer now explain answer the 1-4 questions ​

Answers

1 If I was an official I should always be supportive and responsible, because my collegues count on my help and that I am informed about everything. You need these characteristics for the rest of your life so that you can stay reliable if someone asks for advice.

2 The most important trait as an official is fairness, because they should always treat everyone equally, no matter where they come from or what different features they have. Also during an argument they have to stay fair and listen to both sides to solve the problem peacefully.

3 They can improve their officiating skills by always acting professional and not let private life and work life mix for example. It's important to keep some kind of professional distance between them and colleagues. Precision can be improved by concentrating and working more accurately.

4 I think that I could handle officiating basketball in my community, because I am a very responsible person, who cares about everyone equally and would act fair in every situation. I can also take responsibility about certain things or people. Furthermore I like organising and maintaining a professional lifestyle.

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A large protein needs to enter a cell to help preform a function explain what process the cell must use to allow the protein to enter and why

Answers

Answer:

The protein is too large to simply diffuse across the phospholipid bilayer of the cell, so it uses phagocytosis to diffuse across, where it is contained in a vesicle and pinched into the cell? Credits to yahoo answer. Hope I could help sweets.

Cell membranes acts as a barrier for the large,charged and polar molecules due to their hydrophobic nature.

These molecules are transported with the help of membrane proteins such as carrier proteins across the plasma membrane by a process known as facilitated diffusion. These membrane proteins diffuse larger molecules across the cell membrane that cannot be transported by simple diffusion.

What is the name for the type of graph shown in the image below?
A) Bar graph
B) Box-and-whisker
C) Cumulative frequency
D) Stem-and-leaf

Answers

Answer:

box-and-whisker is the right answer i think

Answer:

box and whisker

Explanation:

B

A person who is exercising vigorously breathes more deeply and rapidly than someone who is resting. Give TWO reasons why this is necessary.

Answers

During physical exercise, more oxygen is used up and more carbon dioxide is produced leading to faster and deeper breathing.

Physical exercise is a state in which the muscles are flexed much vigorously leading to a faster heartbeat owing to a quicker rate of pumping of the blood by the heart.

There are two main reasons why a person engaging in physical exercise tends to breathe faster and more deeply;

The muscles tend to work harder during physical exercise hence more carbon dioxide is produced.The body uses up oxygen more quickly leading to a greater demand for oxygen and thus a faster and heavier breathing rate results.

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In 3-5 sentences explain which type of reproduction is more beneficial, asexual or sexual.

Answers

Sexual reproduction can be more beneficial because it allows for more diversity within a species. That means that the species can adapt to changes better and develop traits that help them survive better. Asexual reproduction creates an exact copy of the parents, so there is little to no variation between the parent and offspring. Sexual reproduction ensures the offspring has the traits of both parents, plus has a higher chance of beneficial mutations such as better camouflage.

Which three questions that the student might be asking can be answered using
science?
A. Should I have an egg for breakfast, or oatmeal?
B. What chemicals were in the food of the chicken that laid this egg?
C. Is it wrong to eat a chicken egg?
D. How many eggs can a chicken lay in one day?
E. How strong is the shell that covers an egg?

Answers

Answer:

B, D, and E

Explanation:

Complete the blanks in the following paragraph using the appropriate words from the list:

anterior, bilateral, inferior, lateral, medial, posterior, superior

Dominic's friends thought they were really funny when they dropped a water balloon on his head! The water drenched the (1) ___ portion of his head and then ran down the (2) ___ portion of his body, getting the front of his shirt all wet. He and his younger brother decided to get back at his friends by sneaking up on them with their water guns. They tiptoed up behind C.J., soaking his back and the entire (3)___ of his body. Next, they snuck up on Tony. Dominic sprayed down the middle, (4)___ part of Tony's body while his brother sprayed the arms and other (5) ___ portions. Good thing it was a hot day because everyone was soaked by the end of the game!

Answers

Answer:

1 Superior

2 Anterior

3 Posterior

4 Medial

5 Bilateral

Because Tibetans live in high-altitude mountains, which of the following is an adaptation they may experience?

Answers

Answer:

all of the above is correct edg

Explanation:

name 4 types of ecosystem services there are. Give 3-4 examples of these services in our world.

Answers

Answer: traditional economy, market economy, mixed economy, command economy

Explanation: 1. Canada or Alaska 2. There are no pure market economies 3. The USA 4. North Korea

Where does protein synthesis begin?

Answers

Answer:

Protein synthesis occurs in the cytoplasm on ribonucleoprotein particles, the ribosomes.

Explanation:

hope it helps

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