How is nitrogen gas fixed biologically?

A. combustion of fossil fuels
B. decomposition of organic matter
C. respiration of living organisms
D. bacteria in plant roots and soil

Answers

Answer 1

Answer:

D. BACTERIA IN PLANT ROOTS AND SOIL


Related Questions

Which of the following is not a characteristic of living things

Answers

Answer:

C. Must be able to reproduce

Explanation:

A. All living things must grow and develop

B. Single-celled organisms exist and are considered living things.

D. All living things must have DNA in their cells.

Some people have their gall bladder surgically removed to the formation of gall stones. Describe the function of the gall bladder and explain how a gall bladder removal would have on their digestion.

Answers

Underneath the right side of the liver, the gallbladder is a pear-shaped organ.

What is the function of gall bladder?

Its primary function is to gather and concentrate bile, a digestive fluid made by the liver. The gallbladder is where bile is kept after the liver produces it. The gallbladder receives a signal from the stomach when you eat. Bile is released from the gallbladder when it contracts, and it travels through the gut via the major common duct. Bile combines with the food there and aids in digestion.

When the gallbladder is removed from a healthy person, there are rarely any obvious health or digestive issues, though there is a slight chance of diarrhea and fat malabsorption.

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Human beings have a long period of development, requiring nurturance and protection for many years. What would evolutionary theorists argue about this long period of relative immaturity?

Answers

There argument would be that It is a necessity because a long period of adaptation is needed for acquiring physical and cognitive competencies.

Who are the evolutionary theorists?

Evolutionary theorists are those scientist in the field of psychology that studied the long term discoveries about the development of human beings from generation to generation.

They where able to discover that human beings have a long term period of development requiring nurturance and protection for many years.

This was so because such a long period of time is needed for them to acquire both physical and cognitive competencies.

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Explain why the population of girls are more than that of boys in terms of variation.

Answers

Answer:

females have 2X chromosomes but males have one 1Y and 1X chromosome therefore if the male donates the x chromosome the baby will be a girl

What blood vessel is found in the anterior-medial thigh?

Answers

The blood vessel that is found in the anterior-medial thigh is the femoral artery.

What is the femoral artery?

The femoral artery is a  major blood vessel that transports blood from the abdomen to the lower limbs.

The femoral artery is fundamental because it transports high volumes of oxygen-rich blood.

In conclusion, the blood vessel that is found in the anterior-medial thigh is the femoral artery.

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cellular membrane are permeable to _______ but impermeable to __________

Answers

Cellular membrane are permeable to nutrients but impermeable to protein.

What is cell membrane?

Cell membrane is the cellular structure that surrounds the cell which is semi permeable thereby selecting the substances that either leaves or enters the cell.

Nutrients are chemical that helps to sustain the cell while proteins are used to build up worn out part of the cell.

Therefore, the cell membrane allows the cell to absorb nutrients by resists the removal of proteins.

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Which describes these molecules correctly

Answers

The correct description of the given molecule is C. Fatty Acid.

Why is this molecule a fatty acid?

A typical fatty acid has a straight chain of carbon atoms. These atoms are then bonded with hydrogen atoms.

At the end of this line, there will be a -COOH bond and at the beginning, there is an H bond. This is what is depicted in the diagram so it must be a fatty acid molecule.

Options for this question include:

A. ribose

B. glucose

C. fatty acid

D. sucrose

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The ability of muscle to shorten forcibly when adequately stimulated is known as ________, and sets muscle apart from other tissue types.

Answers

Answer: Contractility

Explanation:

The ability of muscle to shorten forcibly when adequately stimulated is known as contractility, and sets muscle apart from other tissue types.

A student lifts a set of books off a table and places them in the upper shelf of a book case which is 2 meters above the table. If she applies a force of 5 newtons to lift these books, what is the work done?

Answers

If a force of 5 newtons is applied to lift books 2 meters, the work done is 10 newton meters.

How work can be calculated?

The formula for calculating work is Work = Force x Distance so for calculating work we have to multiply 2 meters with 5 newtons force then we get 10 newton meters.

So we can conclude that If a force of 5 newtons is applied to lift books 2 meters, the work done is 10 newton meters.

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From the calculations, the work done on the book is 10 J.

What is work?

In science, work is said to be done when the force applied moves a distance in the direction of the force.

Given that;

Force applied = 5 N

Distance covered = 2 m

It the follows that the work done is;

W = F * d

W = 5 N * 2m = 10 J

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why do cell biologists study yeast?

Answers

Biologists study cells due to the cell relation to that of animal cell

What are yeasts?

Yeast are eukaryotic organisms which are part of the fungus kingdom.

They are important to biologist because they tend too carry out all the functions of the eukaryotic cells and they are known to be closely related to animals

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which term describes an
enzyme?

Answers

Answer:

A biological catalyst

Explanation:

An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell. The enzyme is not destroyed during the reaction and is used over and over.

Why is scientific knowledge more reliable than other types of knowledge?
A. Because false hypotheses are discarded, and results are peer reviewed by other experts to ensure accuracy.
B. Science is not more reliable.
C. Because science only uses facts that are proven 100% true through the use of variables.
D. Because scientists are more reliable than other people.

Answers

Answer:

C

Explanation:

Everything around us is all about science...We practice them everyday...All thanks to the scientists after so much examines,they let us know more about many things we don't know much about,they worked on them and improve them so that we can live a convenient life.

which type of study that a student is doing by exploring the external features of an animal

Answers

Answer:

analyzing behaviors of living animals with a common ancestry

analyzing embryos and skeletons of animals of the same species

analyzing DNA sequences and embryonic development

analyzing the the fossilized remains of animals from different time periods

In the overall process of glycolysis and cellular respiration, __________ is oxidized and __________ is reduced.

Answers

In the overall process of glycolysis and cellular respiration, glucose is oxidized and oxygen is reduced.

This whole process of oxidation and reduction is called aerobic respiration.

In this process glucose reacts with molecular oxygen to produce carbon dioxide and water, hence the carbon atoms in glucose are oxidized.

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Which energy transformation occurs in the 2nd step of photosynthesis?

Answers

The light-dependent reactions

Why are there 64 combinations of genetic codons for only 20 different amino acids?

Answers

Answer:

Because they all don't code for specific amino acids

Explanation:

Some of them don't code for Amino acids, instead, they code for directions. There are also amino acids that can be coded with multiple codons. this is why there are more codons than amino acids

Because DNA consists of four different bases, and because there are three bases in a codon, and because 4 * 4 * 4 = 64, there are 64 possible patterns for a codon. Since there are only 20 possible amino acids, this means that there is some redundancy -- several different codons can encode for the same amino acid.

The sensing component of the feedback system that senses the changes in the environment and generates nerve impulse is known as a/an ______________.
receptor
effector
stimulus
response

Answers

The sensing component of the feedback system that senses the changes in the environment and generates nerve impulse is known as a receptor.

What are nerve receptors?

Nerve receptors can be defined as biological structures capable of converting external/internal stimuli to electrical impulses.

Nerve receptors include different types of cellular structures located in eyes, skin, mouth, nose, etc.

In conclusion, the sensing component of the feedback system that senses the changes in the environment and generates nerve impulse is known as a receptor.

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Convert this measurement, 6.410102 , from scientific notation to standard notation.

Answers

This measurement, 6.410102 , is from scientific notation to standard notation.  The answer will be 6.41

What is Scientific notation?

Scientific notation is a way of writing numbers in two parts:

Only the figures (with the decimal point after the first digit), followed by × 10 to the power that moves the decimal point where you should be (that is, showing how many positions the decimal point moves).

On the other hand, the standard notation is the one that is normally used for not-so-large numbers by putting one digit behind another.

Thus, The answer will be 6.41.

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Axial skeleton (how many bones and what?)

Answers

Axial skeleton is composed of 80 bones in the body system.

What is Axial skeleton?

These are bones which are found in the central core of the body and examples include skull, vertebrae etc.

The axial skeleton comprises of 80 bones which perform various types of functions in the body.

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Why do some codons code for the same
amino acid as another codon?
A. It is due to mutations.
B. There are only 20 amino acids and 64 possible
combinations.
C. Each codon is unique and they all code for different
amino acids.

Answers

Answer: B

Explanation: Multiple different combinations of bases (A, G, C, T) can code for the same amino acid. This means that there are more possible combinations of the bases than there are amino acids. There are 20 amino acids and the four bases can have up to 64 different codon combinations.

1.Is there an industrial or disposal process of using sieving to separate mixtures? Describe any environmental impact it might have

Answers

Answer:

Yes

Explanation:

There are plenty of evidences and uses of sieving

It was begun by Romans

Nowadays it's used to separate several mixtures like sands for construction,food materials etc

When must personnel receive training to perform animal procedures?

Answers

The personnel must receive training to perform animal procedures before any procedures are performed on the animal.

What is animal care during experimentation?

The animals used for research and experiments should be taken care of in. such a way that they can be replaced, reduced and refined.

According to the animal guide policy, any scientist that would use an animal for a research work would have to undergo a training before performing any procedures on the animal.

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During an action potential, the rapid decrease in sodium permeability and simultaneous increase in potassium permeability is responsible for __________.

Answers

the repolarization of the cell.

Mechanism :

Action potentials are signals that are sent and received by muscle and nerve cells. Because of the negative concentration gradient in the resting membrane potential of nerve cells, there are more positively charged ions outside the cell than inside. There are more sodium ions outside the cell and more potassium ions within because these positively charged ions are sodium ions. Action potentials cause the membrane to depolarize, which is followed by the process of repolarizing the cell. The membrane potential changes and reverts to the negative value of the resting potential during repolarization. The potassium channels open and the sodium channels close at this stage, allowing the nerve cell to lose positively charged ions.  

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Which of the following is an example of a beneficial mutation?

A.
a mutation causing uncontrolled cell division in human tissue cells
B.
a mutation inhibiting human immunodeficiency virus from entering the host cell
C.
a mutation resulting in partial or complete loss of chlorophyll pigments in plants
D.
a mutation resulting in a squirrel being born without ovaries

Answers

Answer: A

Explanation: TOOK THE TEST OK

Explain how the wall thicknesses are related to the functions of the chambers.

Answers

The explanation of how the heart wall thicknesses are related to the functions of the chambers are as explained below.

How to know heart wall thickness and chambers?

Heart chambers are four hollow spaces within the human heart which are made up of two atria and two ventricles.

The thickness of the heart wall is related to the force of contraction required  in the heart in the sense that the left ventricle which is the thickest wall contracts with the greatest force and creates the greatest amount of blood pressure in the heart chambers.

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Bone cells that become surrounded by bone matrix and are located in cavities called lacunae are:.

Answers

Answer:

Osteocytes

Explanation:

i studied this

PLEASE ANSWER LOLL 100 points

Answers

Answer:

[tex]\textsf {Option 2}[/tex]

Explanation:

Hot springs and geysers are formed by the heating of groundwater. This is evidenced by the bursting of these natural phenomena, releasing heat.

Match the items. The task is to match the lettered items with the correct numbered items. Appearing below is a list of lettered items. Following that is a list of numbered items. Each numbered item is followed by a drop-down. Select the letter in the drop down that best matches the numbered item with the lettered alternatives. a. Host ribosomes cannot translate it. Need to copied to strand to make viral proteins b. Translated directly to make viral proteins c. Integrated viral genome in an animal host d. Enzyme needed to copy RNA to RNA e. Synthesizes complementary ssDNA once inside the cell.

Answers

The lettered items are matched with the correct numbered items as follows:

a. -SSRNA: host ribosomes cannot translate it. Thus, it need to be copied to + strand to make viral proteins.

b. +SSRNA: it can be translated directly to make viral proteins.

c. Provirus: the integrated viral genome in an animal host.

d. RNA dependent RNA polymerase: an enzyme needed to copy RNA to RNA.

e. Retrovirus: it synthesizes complementary ssDNA once inside the cell.

What is a genome?

A genome can be defined as the complete set of hereditary instructions which is typically found in the deoxyribonucleic acid (DNA) such as:

+SSRNA-SSRNADSRNA

In conclusion, the lettered items should be matched with the correct numbered items as follows:

-SSRNA: the host ribosomes cannot translate it. Thus, it need to be copied to + strand to make viral proteins.+SSRNA: it can be translated directly to make viral proteins. Provirus: the integrated viral genome in an animal host. RNA dependent RNA polymerase: an enzyme needed to copy RNA to RNA. Retrovirus: it synthesizes complementary ssDNA once inside the cell.

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Complete Question:

Match the items. The task is to match the lettered items with the correct numbered items. Appearing below is a list of lettered items. Following that is a list of numbered items. Each numbered item is followed by a drop-down. Select the letter in the drop down that best matches the numbered item with the lettered alternatives.

a. Host ribosomes cannot translate it. Need to copied to strand to make viral proteins

b. Translated directly to make viral proteins

c. Integrated viral genome in an animal host

d. Enzyme needed to copy RNA to RNA

e. Synthesizes complementary ssDNA once inside the cell.

1. +SSRNA

2. -SSRNA

3. Retrovirus

4. RNA dependent RNA polymerase

5. Provirus

Which bronchus is about 5cm long and slightly narrower and more horizontal than the one on the opposite side?.

Answers

Answer:

Explanation:

left main bronchus

ASAPPPP EASYYYY ILL MARK BRAINLY
Select all direct effects increasing UVR have on animals?
is
a) reduces immunity to diseases
a direct effect increasing UVR have on animals

Answers

a. reduces immunity to diseases

The effect increasing UVR has on animals is reducing immunity to diseases.

What is UVR?

A body could be heated to an incandescent temperature to generate UV radiation, which seems to be the case with solar UV, or an electric current would be sent through a gas, typically vaporized mercury, to generate UV radiation.

What are diseases?

A disease would be a specific aberrant state that adversely affects an organism's structure as well as function on the whole or in part, and which could be not immediately brought on by any external trauma.

Therefore, the correct answer will be an option (a)

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A man of height 1.5 m is standing in front of a tower of height 81.5 m. At what angle should he observe the top of the tower from the distance of 80 m? During the civil war, Clara Barton and Louisa May Alcott contributed to the union war effort mainly by Perspective influences how a person looks at a piece of art and its qualities.a.always truec.always falseb.sometimes trued.Perspective is not relevant in the interpretation of art.Please select the best answer from the choices providedABCD Cartographers divide the world intohemispheres.The letter E on the map identifies theThe line that divides the Western and EasternHemispheres is theThe letter B, which represents Asia, is located in theHemispheres. Please help me with my math Which kind of text below is not an example of "Narrative" text? A. a news report B. a novel C. a biography Use the periodic table to answer the following questions.What is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium?Be > Ca > Mg > SrBe > Mg > Ca > SrCa > Sr > Be > MgSr > Ca > Mg > Be Read the passage from chapter 1 of Animal Farm."Now, comrades, what is the nature of this life of ours? Let us face it, our lives are miserable, laborious, and short. We are born, we are given just so much food as will keep the breath in our bodies, and those of us who are capable of it are forced to work to the last atom of our strength; and the very instant that our usefulness has come to an end we are slaughtered with hideous cruelty. No animal in England knows the meaning of happiness or leisure after he is a year old. No animal in England is free. The life of an animal is misery and slavery: that is the plain truth.Which historical figures do the animals most likely symbolize?the powerful European aristocracy the labor class of the Soviet Unionthe English farmers of World War Ithe Bolshevik revolutionaries Which ONE of the following statements is true concerning the historical development of government?Select one:a.Things were stagnant in government development for hundreds of years.b.Aristotle continued to develop more theories about government.c.Several Greek philosophers came up with revolutionary thoughts about government.d.No theories about government had been developed until the modern times. What decimal is equivalent to ?7-25 Ruskin has a $150,000 cash balance on both its ledger balance and its available bank balance. If Ruskin receives a check and deposits it in its checking account, funds are not made available on this particular check for 2 days. What is the float amount? What does king mean by the ""weapon of love?"" what do you think king means when he says that ""people are taught to hate us""? Read thispassage:The college application process can be difficult and filledwith many challenges. The first step a student should takeis to research schools that meethis or her specificeducational needs and offer opportunities that pique thestudent's interests.What makes this passage an example of expository prose? Match each quadratic equation with its roots.a2-a+11=0a2-2a+15=0a = 1ti141 47a= 2a=1+432a=1+3ia2-2a+10=0a2-a+12=030 Which of the following actions is most likely to cause tensionbetween the competing values of individualism and rule of law? Learning is a process by which experience results in. A velocity-time graph can give youA. Displacement of the moving objectB. Acceleration, displacement, and velocity.C. Velocity of the moving objectD. Acceleration of the moving object how did bob dylan generate controversy at the newport folk festival in 1965? kept the work of Greek and Roman scientistsalive during the Middle Agesmedieval universitiesprinting pressclassical studies Can someone help me with question 3? I like to see the working and answer on paper, that would be more helpful, Im in a hurry