Two groups of tomatoes were grown in the laboratory, one with humus added to the soil and the other a control without humus. The leaves of the plants grown without humus were yellowish (less green) compared with those of the plants grown in humus-enriched soil. The best explanation for this difference is that __________.

Answers

Answer 1

Answer:

The best explanation for this difference is that the humus contained micronutrients needed by the plants for the synthesis of chlorophyll, such as Manganese (Mn), Iron (Fe) and Copper (Cu).

Explanation:

Chlorosis is the yellowing of plant leaves, and this is due to the deficiency in the amount of chlorophyll contained in the plant leaves. Iron (Fe) is an essential micronutrient for the synthesis of chlorophyll, which is an enzyme-catalyzed reaction. Copper (Cu) is a component of most enzymes, while Manganese (Mn) is a cofactor, required for the activation of the enzymes that catalyze chlorophyll synthesis, hence deficiency of these nutrients will result in the development of chlorosis.


Related Questions

Which is the best interpretation of the two flat portions of the graph?

A. These show where the temperature is 0ºC.

B. These show where changes of state are occurring.

C. These show where kinetic energy is increasing.

D. These show where thermal energy does not exist.

Answers

Answer:

B, they are changes of state.

The best interpretation of the two flat portions of the graph where these shows that change of state are occurring. Thus, C is correct option.

What are change of state?

A state is physical condition of any substances it means that any substance which found on earth are mainly found in three states and these are following:-

1- Solid

2- Liquid

3- Gas

A change of state is physical change of state i.e any substance which changes their state from ( solid to liquid called melting), (liquid to gas called evaporation), (gas to solid called diffusion) etc  are called change of state.

These change of state occurs when temperatures or pressure changes in a system or substances. When the temperature or pressure increase  the interaction between the molecules also increases.

Therefore,the best interpretation of the two flat portions of the graph where these shows that change of state are occurring. Thus, C is correct option.

Learn more about change of state here:

https://brainly.com/question/14778824

#SPJ2

If a hermit crab leaves its shell, is the shell biotic?

Answers

No, because the shell was never alive.

Answer:

no

Explanation:

The following events are part of a negative-feedback mechanism. I. blood pressure increase II. receptors detect a low blood pressure III. control center compares actual pressure with the set point IV. the heart beats faster Choose the arrangement that lists the event in the order they occur.

Answers

Answer:

II, III, IV, I

Explanation:

Blood pressure regulation is an example of negative feedback mechanism. When the blood pressure is low, sensor in the blood vessels called baroreceptors detect this and send a signal to the control center which is the hypothalamus.

The hypothalamus compares the current blood pressure with the normal and proceeds to send signals to the heart, as well as blood vessels and kidneys. The heart begins to beat faster, thereby increasing the heart rate and a a result, blood pressure goes back up to normal.

Over the period of a few days, a hospital receives an overwhelming increase in the number of patients with food poisoning. How would a scientist respond to this increase in sick patients? A. by examining the type and source of foods each patient ate and identifying patterns of overlap within the foods consumed B. by giving the patients vitamin injections and prescribing a medication to calm their stomach and bowel symptoms C. by recording the patients' symptoms in their medical records and advising them to get rest and drink fluids D.by providing kind words, nurturing, and emotional support to the patients and asking them about their feelings

Answers

Answer:

A. By examining the type and source of foods each patient ate and identifying patterns of overlap within the foods consume.

Explanation:

I believe a medical professional would be the one to prescribe patients with any sort of medicine they needed, whereas the scientist would be investigated what caused the food poison and running tests to help find out what happened.

Answer:

A. By examining the type and source of foods each patient ate and identifying patterns of overlap within the foods consume.

Explanation:

the size of ribosome of _________cell is smaller than ribosome of plant cell. A. Animal cell B. fungal cell C.Bacterial cell D. Protists cell

Answers

Answer:

the size of ribosome of (animal cell )is smaller than ribosome of plant cell

Answer:

Animal cell  is smaller than ribosome of plant cell

Explanation:

How is multi cellularity advantages over increasing the mass of a single cell

Answers

Answer:

Multicellular organisms

hoped i helped

What will happen if external factors affect cell division in a group of cells placed in a culture dish? A) Anchorage dependence will cause the cells to attach to each other after dividing. B) Anchorage dependence will prevent the cells from dividing until they attach to the dish. C) Density-dependent inhibition will cause the cells to divide until the dish is completely full. D) Density-dependent inhibition will destroy large cells to create room for new cells.

Answers

Answer:

C) density-dependent inhibition will cause the cells to divide until the dish is completely full

Explanation:

Just took the exam

Which state of water concentration is healthiest in an animal cell?
A. Isotonic
OB. Hypertonic
C. Equitonic
D. Hypotonic

Answers

Answer:

D. Hypotonic

Explanation:

Answer:

C. Isotonic

Explanation:

i took the quiz and its right

Type your response in the box. Many countries have laws that regulate hunting, including restricting hunting to specific times of year. Why is this hunting restriction important for preserving certain animal populations?

Answers

Answer:

You can only hunt dear (example) for only sertin times of the year because when the doe's have their fans people want them to get big before they shoot them

Answer:

Animal populations can change from one season to another, so it’s important to restrict hunting to seasons when the population is high. Such a restriction helps prevent a severe drop in population, which could threaten the species. It’s also important to limit hunting during breeding seasons to increase the possibility of offspring reaching adulthood.

Explanation:

Plato.

How do simple organisms exchange substances?

Answers

Answer:

A simple, unicellular organism (consisting of one cell) can rely on diffusion to move substances into and out of the cell. Its surface area is large compared to its volume , so nutrients and other substances can pass quickly through the membrane and around its 'body'.

In part A, you analyzed genes that contribute to two diseases. (cystic fibrosis and muscular dystrophy) How can scientists use this information to develop new treatments for these diseases? Based on your findings, do you think that scientists will need to develop multiple treatments to control symptoms of these diseases? Explain your reasoning.

Answers

Answer:

By designing suitable gene therapies in order to restore target gene expression.

Explanation:

Cystic fibrosis and muscular dystrophy are inherited genetic disorders associated with serious health problems. Cystic fibrosis is caused by mutations in the gene that encodes for the cystic fibrosis transmembrane conductance regulator (CFTR) protein, and it is a condition associated with abnormal production of sticky mucus that leads to problems in the lungs and the digestive systems. On the other hand, muscular dystrophy is produced by mutations in genes localized on the X chromosome such as, for example, the gene 'dystrophin'. Gene therapy is an experimental approach used to compensate abnormal gene function by introducing exogenous genetic material and thus restore their altered protein products. Consequently, personalized gene therapies can be useful to treat inherited disorders such as cystic fibrosis and muscular dystrophy.

identiying Parts of Spheres Use the drop-down menus to identify the spheres to which each part belongs.

A lake is part of the ___

Water vapor in the air is part of the___

Glacier and iceburgs are part of the___

The rocky mountains are part of the___

A deer is part of the____​

Answers

Answer:

Answer is

A lake is part of the hydrosphere.

Water vapor in the air is part of the atmosphere.

Glacier and icebergs are part of the cryosphere.

The Rocky Mountains are part of the geosphere.

A deer is part of the biosphere.

Which of the following is NOT true of enzyme activity? a. enzyme shape may change during catalysis b. the active site on an enzyme orients its substrate molecules, therby promoting interaction of their reactive parts c. all enzymes have an active site where substrates are temporarily bound d. each enzyme can catalyze a wide variety of different reactions

Answers

Answer:

D. Each enzyme can catalyze a wide variety of different reactions

Explanation:

Each enzyme can only catalyze a few, specific types of reactions.

Since enzymes and substrates are very specific to one another, enzymes cannot catalyze a wide variety of reactions.

If a substrate is not the correct one that fits in the enzyme's active site, a reaction will not occur.

So, each enzyme can only assist in a few reactions.

The correct answer is D. Each enzyme can catalyze a wide variety of different reactions

what is difference between pressure exerted by liquid than by a solid​

Answers

pressure of solids occurs only due to the weight of the solid, whereas pressure of liquid occurs due to both weight and movement of the liquid molecules

What is biology??And what does it came from??

Answers

Answer:

BIOLOGY IS THE STUDY OF LIFE

Explanation:

Answer:

Biology is studying about life and the human body. The term biology in its modern sense appears to have been introduced independently by Thomas Beddoes (in 1799)

Hope this helps!

What is the definition of salinity ?

Answers

Answer:

Salinity pertains to the degree of saltiness or the relative proportion of salt in a solution. ... By definition, salinity in relation to limnology refers to the total amount of dissolved solids in water in parts per thousand by weight.

Answer:

Salinity is the saltiness or dissolved inorganic salt content of a body of water. Substances that are dissolved in water are usually called solutes.

Explanation:

Read each of the following statements. If it describes a process of reproduction, write yes.
If not, write no.
19. New leaves appear on a tree in spring.
20.
An amoeba divides in half.
21.
A bean plant produces seeds in long pods.
22.
Pollen grains are released from a flower.
23.
A sea star produces a new arm after losing one to a predator.​

Answers

Answer:

New leaves appear on a tree in spring. - NO

An amoeba divides in half. - YES

A bean plant produces seeds in long pods. - YES

Pollen grains are released from a flower. - YES

A sea star produces a new arm after losing one to a predator.​ - NO

Explanation:

The appearance of new leaves has nothing to do with reproduction but rather regeneration.

An amoeba dividing in half is a form of reproduction known as asexual. Binary fission is a reproductive process in which an organism divides into two and each half develops into new independent organisms.

A bean plant producing seed is part of the reproductive process. After fertilization, the ovule of a flower becomes the seed. A seed in itself is a ripened fertilized ovule.

The release of pollen grains from the anther of a flower to the stigma of a compatible flower in the same or different individuals plants is known as pollination. Pollination is a reproductive process similar to fertilization.

A sea star producing a new arm after losing one to a predator is a regeneration process rather than a reproductive process.

Well this isn’t biology this is earth science but it doesn’t have the option.... 1. What geologic processes must have occurred for fossil ammonites (relatives to the nautilus that dominated oceans hundreds of years ago) to now be found in rocks at the highest mountains on Earth??

2. What would our planet look like if it contained no radioactive isotopes within it? What would it look like if radioactivity were producing twice as much heat within Earth’s interior?

Answers

The answers are that the geological process responsible for fossils being found on high mountains today is called Orogeny Tectonics. With no radioactive isotopes, the Earth's geography would be vastly different and void of life. If radioactivity produced twice as much heat the earth would become unstable.

The discovery of fossil ammonites within rocks at the highest mountains on Earth is due to orogenic plate tectonics. Plate tectonics is the name we use to describe a process in which pieces of the earth's crust move and often slam into each other, causing one of these to pile onto the other.

This can lead to the formation of mountains and mountain ranges. This process helps to explain why fossils of ammonites known to dwell in the ocean can be found in mountains.

Radioactive isotopes, or better yet, the decaying of radioactive isotopes, are responsible for generating most of the Earth's internal heat. The internal heat of the earth is the driving force of plate tectonics and without it, much of the geological activities responsible for the earth's current geography would not have happened.

Mountain ranges would not have formedPlate tectonics would not have caused the formation of the continents we know todayThe earth would lack a magnetic field to defend against ionizing radiation from the sunLife would likely not have evolved.

Radioactive isotopes were vital in allowing for the conditions of the earth at the time that life evolved, and the heat they produce allows the earth to have a molten core and thus generate a magnetic field for protection.

Now, if the heat produced by radioactive isotopes were to double, the  Earth's internal temperature would nearly double. Since this heat is the driving force for plate tectonics, we can expect a sharp increase in the number of earthquakes and volcanic eruptions. These can, in turn, cause tsunamis and changes to the earth's global temperature. Mountains would form continuously and continents may break apart. This instability would make life on earth's surface improbable.

Therefore, the geological process responsible for fossils being found on high mountains today is called Orogeny Tectonics. Without radioactive isotopes, the Earth's geography would be vastly different and void of life. Radioactivity producing twice as much heat would make the earth very unstable.

For more on plate tectonics see:

https://brainly.com/question/15115188?referrer=searchResults

can someone please tell me what bug this is?

Answers

Answer:

kinda looks like a cricket or grasshopper prob a cricket tho

Explanation:

explain the reason for the variation in production by referring to the possible causes for variation in a population​

Answers

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

which class question is this?

please help!!
What are some factors that influence emotional changes throughout adolescence?

Answers

Answer:

Explanation:

Some of the factors that influence emotional changes during adolescence include, among others, changes in self-perception, changes in the way teens are treated, increased sensitivity to criticism, increased desire for independence, and an increased need to belong.

What is the Defenition of Metabolism?

a
When offspring change and develop over millions of years
b
When living things change over time.
c
The flow of chemical energy in an organism.
d
When an organism produces an offspring

Answers

The answer is

C. The flow of chemical energy in an organism.

Metabolism is the chemical processes that occur within a living organism in order to maintain life.

WILL GIVE BRAINLIEST AND POINTS!!!!!!! How long can we survive on each planet of the solar system without a spacesuit?

Answers

Answer:

about 80 days

Explanation:

the time period of survival is roughly a second, even though the gravity force is equal to that of Earth (the more you know!) Without holding our breaths, or donning any kind of spacesuit, we can survive for about 80 years

Which of the following is not a function of the cell membrane? A. Keeping all the parts of a cell inside B. Helping a cell to alter its shape C. Allow prokaryotes to use cell division D. A place for cellular reactions to take place

Answers

Answer:

D. A place for cellular reactions to take place

Explanation:

the cell membrane perfomes divers functions ranging from the  Keeping of all the parts of a cell inside, helping cell to alter its shape, allowing prokaryotes to use cell division. Most of the cell reactions happens in the Mitochondrion, not the CELL MEMBRANE

A place for cellular reactions to take place is not true about cell membrane .

What are the function of cell membrane ?

Cell membrane forms barrier keeping the constituents of the cell in and unwanted substances out and to be a gate allowing transport into the cell of essential nutrients and movement from the cell of waste products.

What is cell membrane?

The cell membrane, also called the plasma membrane, is found in all cells and separates the interior of the cell from the outside environment.

Hence, D is correct option

To learn more about cell membrane, here

https://brainly.com/question/18478861?referrer=searchResults

#SPJ2

Which area of the brain receives information collected from mechanoreceptors?
Pons
Olfactory lobe
Medulla
Somatosensory cortex

Answers

Answer:

I think, you answer is.

somatosensory cortex.

Explanation:

Hope it helps you.....

Thank you..

Somatosensory cortex area of the brain receives information collected from mechanoreceptors. Option D is correct.

The somatosensory cortex is a region of the brain that receives information collected from mechanoreceptors. Mechanoreceptors are sensory receptors that respond to mechanical stimuli, such as touch, pressure, and vibration. The somatosensory cortex is located in the parietal lobe of the brain, and it is divided into two parts: the primary somatosensory cortex and the secondary somatosensory cortex.

The primary somatosensory cortex receives information from the skin, muscles, and joints. The secondary somatosensory cortex integrates this information and allows us to perceive the location, intensity, and quality of touch. The pons is a region of the brainstem that is involved in the coordination of movement and the regulation of sleep. The olfactory lobe is a region of the brain that is involved in the sense of smell. The medulla is a region of the brainstem that is involved in the control of breathing, heart rate, and blood pressure. Option D is correct.

To know more about the Medulla, here

https://brainly.com/question/32005610

#SPJ2

Which of the following represents a population?
1 point
a single pigeon in a given area
a group of pigeons in a given area
a group of pigeons, mice and trees that live in a given area
all living things and non-living things in a given area

Answers

Answer:

A single pigeon in a given area

Explanation:

It tells us the actual number of pigeon in a specified area

what is the answer to 9k=27

Answers

Answer:

K=3

Explanation:

We divide both sides by 9 which is 9k/9=27/9 then cancel 9 by 9 and by 9 once by 9 thrice.

True or False: Within the body, all atoms combine to form molecules. If false, why?

Answers

Answer:

True

Explanation:

Two or more atoms combine to form a molecule, like how the water molecules, proteins, and sugars are found in living things.

Hope this helps! (づ ̄3 ̄)づ╭❤~

The statement i.e. ''Within the body, all atoms combine to form molecules'' is true.

Atoms combine together to form molecules because atom is unstable substance which can't stay in single form due to its reactive nature but become stable when they form molecules due to filling of outermost shell and attain the electronic configuration of noble gases so we can say that atoms formed molecules in order to attain stability and can not remain individually.

https://brainly.com/question/17184872

Match each scientist to the observation she is most likely to make.
meteorologist
?
The average daily
temperature of the ocean
at the North Pole has
Increased during the past
50 years.
hydrologist
2
Last year, the state of
Florida experienced an
unusually long and active
hurricane season.
geologist
?
The elevation of a
mountain range has
increased 1cm over the
last 50 years.
Earth's rotation was
affected by a massive
underwater earthauake
astronomer
2.​

Answers

The scientist and the observation to be made are matched below:

The meteorologist - Last year, the state of Florida experienced an unusually long and active hurricane season.

The hydrologist- The average daily temperature of the ocean at the North Pole has Increased during the past 50 years.

The geologist- The elevation of a mountain range has increased 1cm over the last 50 years.

The astronomer- Earth's rotation was affected by a massive underwater earthquake.

Astronomers are known to observe planet.

The Meteorologist are known for rainfall observation.

Hydrologist- often observe rivers, water bodies e.g. Mississippi River

Geologist - deals with rocks e.g Mountains observation.

Climate change often cause a shifts in temperatures and weather patterns.

The climate change is largely due to human activity, such as burning fossil fuels, like natural gas, oil, and coal etc.

Conclusively, various types of profession exist in the environmental discipline and each has specific roles to play.

Learn more from

https://brainly.com/question/15227086

Define symbol and valency?​

Answers

Symbol means to indicate a element with 2letters or 1 letter.Valency means How much electrons can a element give or take determined by octet rule.Ex:-Calcium is indicated by Ca .It has valency of 2.

they are blur

but hope you will under stand and pls pls markas brainliest ans

Other Questions
what value of x makes the equation about 0.75x=-9 environmental influence on gene regulation Identifying equivalent statements and negations of a conditional statement: helpAttached is the photo reference. When marginal revenue equals marginal cost, the firm a. should increase the level of production to maximize its profit. b. may be minimizing its losses rather than maximizing its profit. c. must be generating positive economic profits. d. must be generating positive accounting profits. simplify 27-{ 9+(12-5)4} with solution If you know the answer please let me know Which line provides the best evidence to support theanalysis? NO LINKS OR ANSWERING QUESTIONS YOU DON'T KNOW!!!Chapter 11 part 3:Of the three functions {f(x), g(x), h(x)} featured on the graph below (on the following page), rank the functions in order of greatest rate to least. A wheel on a race car has 21-inch diameter. To qualify for an upcoming race, cars must be able to travel a minimum of 130 miles per hour. The wheel on this car can turn at the rate of 36 revolutions per second. Determine the linear speed of a point on the rim of this wheel (nearest inch per second) and determine if this car with this wheel would qualify for the upcoming race. 5 To convert inches per second to miles per hour, multiply by 5/88. A) The linear speed is 756 inches per second, so this car would not quality B) The linear speed is 4750 inches per second, so this car would quality C) The linear speed is 2375 inches per second, so this car would quality D) The linear speed is 378 inches per second, so this car would not qualify. 2. A boy and his father played 26 games of checkers. For every game the boy lost, he gave his father 5 cents. For every game the boy won, his father gave him 8 cents. When all the games were played, neither had won nor lost anything. The number of games the boy won i Anyone help me.... BTW I need proper working. Are young people empowered or endangered by digital technology? Cooperative learning methods fall into two broad categories. One category might be called group study methods. The second category is project-based learning or collaborative learning also known as: At what rates did she invest?$1400 invested at ____%$900 invested at ____% which of the following best describes pseudoscience? ? The answer to this problem laws of thermodynamics ASAP Determine whether the statement is true or false and why. We have discovered a series of humanoid fossils that are similar to humans, but not human. Each of these humanoid species dates to a different period in time becoming more human-like the closer to the present they are, showing a clear evolution into humans.A. False, it should read We have discovered no series of humanoid fossils that are similar to humans, showing a clear lack of any transitional fossils as evidence of human evolutionB. TrueC. False, it should read We have discovered a series of humanoid fossils that are similar to humans, but not human. Each of these humanoid species dates to a different period in time becoming less human-like the closer to the present they are, showing a clear evolution away from humans.D. False, it should read We have discovered a series of humanoid fossils that are similar to humans, but not human. Each of these humanoid species dates to the same period in time, showing that many human-like species existed at once, but all went extinct. How would you describe the statue of liberty to someone who can't see it ?