what is the natural rate of nitrogen fixation in earth’s ecosystems?

Answers

Answer 1

Answer:

A reasonable upper bound for the rate of natural nitrogen fixation on land is thus about 140 Tg of N per year.

Related Questions

Which of these is an advantage of factory farming?
O A. Less efficient operation than family farms
O B. More job opportunities than family farms
O C. Smaller profit margin than family farms
O D. More expensive products than family farms

Answers

Answer:

Explanation:

Answer is not A because this is not a benefit

Not C because it is also not a benefit

not D because it is not a benefit

B is the only benefit listed.

Students place a plant in a dark, windowless closet for two days. Which of these will help the plant maintain homeostasis?

a
decreasing stem size
b
losing all of its leaves
c
using stored sugars
d
growing deeper roots

Answers

Answer:

use stored sugar for energy

which of the following is a property of water?

a. polar molecule
b. regulates temperature
c. universal solvent
d. all of the above

Answers

Answer:

All of the above

Explanation:

The main properties of water are its polarity, cohesion, adhesion, surface tension, high specific heat, and evaporative cooling, which essentially categorizes all of the above.

Answer: All of the above

PLEASE label this image pleasee

Answers

Answer:

Explanation:

because it's dk u need to add dekk and yes it's uesful

The fern goes through alternation of generations in which there is a Diploid stage and a haploid stage. In the diploid stage under the fern’s leaves there is clusters of sporangium called sorus in which meiosis occurs from the diploids sporocyte creating haploid spores. The haploid spores duplicate through mitosis to turn into a gametophyte. The gametophyte has a upper part which holds the eggs called archegonium and in the lower part where sperm is produced called antheridium.After fertilization occurs the egg duplicates and turns into a zygote and eventually back to a diploid sporophyte firn.

Mr. Jones' class is asked to properly identify multicellular eukaryotes. Which key terms below would BEST help a student properly classify these organisms?
A. can be unicellular or multicellular, have a nucleus, and contain complex organelles
B. can only be unicellular, do not contain a nucleus, and do not contain complex organelles
C. can only be multicellular, do not contain a nucleus, and contain complex organelles
D.
can be unicellular or multicellular, have a nucleus, and do not contain complex organelles

Answers

A is definitely the right answer

give me answer all these question

Answers

Answer:

please write the questions I can't tap the picture.

Tortoise shell cats, like the one shown above, are always femaleWhat scientific phenomenon explains the color pattern of

Answers

Tortoise shell cats can be explained as the offspring from a incomplete dominance cross. Incomplete dominance gives rise to an intermediate phenotype.

The scientific phenomenon that explains the color pattern is X-linked incomplete dominance.

As stated earlier, the tortoise shell colour is as a result of incomplete dominance but as it exists only in females, the inheritance is X linked. This means the tortoise shell colour is inherited in the heterozygous condition as females have two X (XX) and males (XY) can only be either of the parent's true breeding genotype.

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which type of stimulus is an allergen, such as pollen?

Answers

Answer:

External stimulus is the type of stimulus an allergen, such as pollen, is classified.

Explanation:

Distilled water is _____ or _______ to the solution inside a cell

Answers

Answer:

hypertonic or hypotonic

Explanation:

Hypertonic or the other h word

chromosomes form during what part of the cell cycle?

Answers

Answer:

Prophase

Explanation:

During the prophase, chromatin condense to form chromosomes that are visible.

Help in this two questions

Answers

Answer:

i dont know what it is i need points

ASAPPPPP!!!

Why do cells have a high surface area to volume ratio? *
A. to contain more nutrients
B. to contain more organelles
C. to more readily exchange substances across the cell.
D. to have only small substances travel across the cell.

Answers

Answer: C

Explanation: Smaller single-celled organisms have a high surface area to volume ratio, which allows them to rely on oxygen and material diffusing into the cell (and wastes diffusing out) in order to survive. The higher the surface area to volume ratio they have, the more effective this process can be.

the recommended daily allowance listed on the nutrition facts label is based on how much caloric intake?

Answers

Answer:

2,000-calorie daily diet.

Explanation:

7) Check the terms that fit into the science category "Biology". Select all that apply. air light solar system water animals sound land plants

Answers

i would say water, animals and plant
pls make me brainliest a

I would say all the above. Besides sound or sound land you are not putting comas so I don’t know if those two go together.

when a tautomeric shift occurs, what is true about the resulting mutation?

Answers

When a tautomeric shift occurs, then the resulting mutation ALWAYS changes a purine to a purine or a pyrimidine to a pyrimidine. A tautomeric shift may lead to a point mutation.

A mutation is any alteration in the nucleotide (DNA) sequence of the genome of an individual.

A tautomeric shift can be defined as a temporary change in the nucleotide base structure.

A transition mutation is a point mutation of one purine or pyrimidine base pair to the other purine/pyrimidine that occurs when one nucleotide base undergoes a tautomeric shift during DNA replication.

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A ____ is the coding and
is the trait.

Answers

The genetic code dictates which proteins the cell manufactures. Proteins are strands of amino acids. The sequence of nucleotides in DNA genes determines the order of amino acids in a protein. This is the direct connection between your genes and your traits.

Diagram and label a chromosome in prophase

Answers

ii) The reason for population control is as followed
1. The desire for a male child.
2. Lack of awareness about birth control measures.
iii) 1. The pituitary gland secretes hormones that regulate all other endocrine glands so it is called the master gland.
2. Gametes are produced by meiosis in which the number of chromosomes gets reduced to half. So they are haploid. During fertilisation, the zygote has a diploid number of chromosomes.

A line graph has a vertical axis labeled "Average plant height (cm)" and a
horizontal axis labeled "Fertilizer (g/plant)." What information is conveyed by
a point plotted with the coordinates (1, 25)? Keep in mind coordinates are
written as (x-coordinate, y-coordinate).
60
40
Average plant height (cm)
30
10
Fertilizer (g/plant)
A. The average height of plants given 1 g of fertilizer was 25 cm.
B. The range of fertilizer was from 1 g per plant to 25 g per plant.
1
оооо
C. The average height of plants given 25 g of fertilizer was 1 cm.
D. The range of average plant height was from 1 cm to 25 cm.

Answers

Answer:

A. The average height of a plant given 1 g of fertilizer was 25 cm.

Explanation:

In an ecosystem, organisms use up
chemical energy and most of the
energy is then lost to the
environment as
A. light
B. heat
C. photons

Answers

B is the correct answer

A small inflamed elevation filled with bacterial fluid and pus and appear red and cloudy or white is known as a: Select one: a. milia b. pustule c. cystic acne d. seborrhea

Answers

Answer:

C. Pustule

Explanation:

why is there no enzyme to digest vitamins

Answers

Answer:

Vitamins are used in their original form by the cells. They are either water soluble or fat soluble, hence no enzyme is required to digest vitamins. They are absorbed directly from the digestive tract, transported by blood to the cells, and the cells absorb and use them whenever they need.

Three kinds of _________ molecules carry out genetic instructions for the production of proteins?

Answers

Answer:

There are three types of RNA involved in protein synthesis:
messenger RNA (mRNA)
transfer RNA (tRNA)
ribisomal RNA (rRNA).

Explanation:

All three of these nucleic acids work together to produce a protein. The mRNA takes the genetic instructions from the nucleus to the cytoplasm, where the ribosomes are located.

A classmate states that both energy and matter can be created during photosynthesis and cellular respiration. Is this true? Explain

Answers

No, the chemical equations for both processes are evidence that matter and energy or neither created nor destroyed

Energy and matter are also produced during photosynthesis.Chemical energy in the form of glucose and matter in the form of oxygen gas are produced during photosynthesis.Since these are the results of the reaction, they are regarded as process outputs.

Can both energy and matter be created during photosynthesis?

Some cells employ a process called photosynthesis to convert light energy into food.Because it enables plants to produce the food required for the rest of the ecosystem, photosynthesis is crucial.Producing organisms, or those that grow their own sustenance, are plants.The foundation of the ecosystem is formed by producers, who transform solar energy into chemical energy in the form of food for themselves and other ecosystem inhabitants.Although many ecosystems are dominated by plants, other organisms are also capable of photosynthesis.Some bacteria and algae are capable of photosynthesizing, and these organisms are the producers in their ecosystem. A biological process called photosynthesis consumes both matter and energy.The world's physical components are made of matter.The capacity to perform work is energy.By use of various mechanisms, matter and energy can be switched for one another.On the other hand, neither matter nor energy can be generated nor destroyed.The first law of thermodynamics is that they constantly evolve into new forms.All processes in the universe operate in this manner.Energy can be transformed into a variety of forms.Several instances include:Chemical drivekinetic energythe potential energy of gravityelastic force The substance and energy persist even after an organism dies.Instead, they are changed into other forms.For instance, both matter and energy are components of plants.Fungi and bacteria in the soil aid in the breakdown of a plant's internal substance into its constituent parts when it dies.These can be used by newly sprouting plants by being recycled into the soil.As a result, neither the energy nor the substance is wasted; rather, they are transformed into new forms.

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this is about environmental systems

Answers

Answer:

A. A weak or strong current

Explanation:

D. is inccorect because rivers are always freshwater

C. is incorrect because seawater is salt water

B. is incorrect because rivers have waterflow.

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In humans, freckles are encoded by a dominant allele. A woman is heterozygous for freckles. According to the law of segregation, allele pairs separate during gamete formation and then randomly unite during fertilization. Which of the following would apply to this woman's child?

Answers

The child having an equal chance of inheriting the dominant allele or the

recessive allele for freckles from her mother is what applies.

The law of segregation by Mendel states that diploid organisms have a pair

of alleles and are passed to their offspring at random.

The woman being heterozygous means she has the dominant and recessive

allele present. Due to the law of segregation stating the alleles are passed

at random to the offspring, the child will have an equal chance of inheriting

the dominant allele or the recessive allele for freckles .

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Normally dividing cells:
replace damaged or lost cells.
heal wounds.
help tissue and organs grow.
help keep a person in shape.

Answers

Most likely A because cells constantly need to be replaced

Replace damaged and/or lost cells

explain the interaction between geological events, human population, and the environment

Answers

The relationship between the environment, human population and geological events is complex and multidimensional. While human activities can also have significant effects on geological processes, geological events such as earthquakes, volcanic eruptions and climate change can have significant effects on the environment and human populations.

What is an Environment?

The conditions and forces that surround an organism, population or community are called its environment. It includes all elements of the Earth, both living and non-living, such as the atmosphere, hydrosphere, lithosphere, and biosphere.

The environment is a complex system that living things interact with and influence how they survive, develop and thrive. This includes biological elements such as plants, animals, microorganisms and their interactions, as well as physical elements such as temperature, light, water, soil, wind and topography.

Therefore, the relationship between the environment, human population and geological events is complex and multidimensional.

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early improvements to microscopes allowed some scientists to view cells and eventually develop what?

Answers

Answer: please add a clear picture

what does it mean for a bacteria or protist to be photosynthetic?

Answers

Answer:

Because we know that photosynthesis is a process that plants use, we can define photosynthetic protists as 'plant-like' protists that get their nutrients by converting sunlight into energy using photosynthesis.

Explanation:

Photosynthetic organisms, also known as photoautotrophs, are organisms that are capable of photosynthesis. Some of these organisms include higher plants, some protists , and bacteria because we know that photosynthesis is a process that plants use, we can define photosynthetic protists as 'plant-like' protists that get their nutrients by converting sunlight into energy using photosynthesis.Protists can be photosynthetic or heterotrophs (organisms that seek outside sources of food in the form of organic material). They also contain chlorophyll, a pigment which absorbs light energy for photosynthesis. Photosynthetic protists are considered plant-like protists.

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A predator prey relationship. in which the populations rise and fall in response to each other is an example of

A -A positive feedback loop
B - A negative feedback loop
C - A manmade feedback loop
D - all of the above

Answers

Answer:

the answer is d (all of the above)

Explanation:

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Which of the following best explains why tangent StartFraction 5 pi Over 6 EndFraction not-equals tangent StartFraction 5 pi Over 3 EndFraction? The angles do not have the same reference angle. Tangent is positive in the second quadrant and negative in the fourth quadrant. Tangent is negative in the second quadrant and positive in the fourth quadrant. The angles do not have the same reference angle or the same sign. there has been multiple ice ages on earth. what causes ice ages? PromptYou recently read a poem by Jos Mart called "Cultivo Una Rosa Blanca."Read the poem again, and give an interpretation about what you think the poem means in Spanish. Provide any personalexperience if desired or applicable.Your response must contain at least 5 detailed and complete sentences in Spanish.You will be graded on (a) appropriate use of grammar and vocabulary. (b) completeness and detail of the response, and (c)overall quality of the response. Verizon has a special and is selling the new iPhone 7 for $299 to new customers. If the Apple Store is charging twice as much as Verizon, then how much is Apple charging for the new phone? Brainlest???How do social media sites impact the hospitality and tourism industry and its employees? Which part of the story begins the development of a character? Exposition Climax Falling action Resolution ]Jane, a 22 year old, single Caucasian college freshman, had been in the emergency room for a reaction to alcohol. She had a blood alcohol level of .30 and was almost comatose. They were able to stabilize her in the ER. She had been binge drinking (over 4 drinks per night) for the last 2 weeks. She was admitted to the hospital for observation and stayed in the hospital for the next few days. When the alcohol was out of her system, she admitted to the counselor that she had been "hearing voices" belittling her for the last six months. She had been feeling people were talking about her on TV and on the radio and felt her professors and her roomate were conspiring against her. She stated she had felt this way for the past 7 months. She had become more and more socially isolated because of her mistrust of others and her grades had dropped. Jane said she started drinking to "drown out the voices" so she could sleep. She wanted the counselor to get the professors and her roomate to stop bothering her. According to Jane, her main problem was about the other people who were bothering her(professors and roomate) and she had just been drinking to help herself sleep and block out the "voices".Jane had a great aunt who had been involuntarily hospitalized for an "emotional disorder". One of her siblings had Schizotypal traits and was considered a little unusual by others. She (Jane)had been an above average student in high school and in college until she began hearing voices and then she became a D student and was missing class frequently. Prior to this she had no mental health history but she had a history of being chronically suspicious and mistrustful of others that did not impair her overall functioning significantly. This had limited her friendships to a few that didn't last very long. She was intelligent and an A- average student in high school. Her physical health was affected by severe chronic asthma since age 3.You should summarize the relevant historical information in the following format (Cut and paste into a word document): Presenting problem: First list the demographic description of the person. Then indicate in 1 or 2 sentences how you think this person would describe their problem (in their "own words") if they were coming to you for treatment. History of the presenting problem: Write 2-3 sentences here to describe the history of the presenting problem. Present information in chronological order. DSM-IV TR diagnosis: Use this as a worksheet and if there is not a diagnosis on Axis I, II or III,***** then put No Diagnosis Axis _Axis I: Clinical diagnoses (psychological disorders) go here; start with the primary diagnosis - Axis II: Only intellectual disability or personality disorders go here - Axis III: Medical conditions go here - Axis IV: Psychosocial and environmental stressors, etc. - ****list and rate from 0- None, 1 - Mild, 2- Moderate, 3-Severe, 4 Very Severe, 5 - CatastrophicAxis V: Global Assessment of Functioning (GAF Score) - 0-10 - needs constant supervision to 90-100 no symptoms, functioning can fluctuate so (state a range of 10 points)****Convert the above diagnosis to DSM 5, 2013 format here: Collapse the first three diagnoses above in order in a sentence form. Delete the Axes labels. 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