From top to bottom, what is the correct order of the layers of cells in a leaf?

1.the epidermis, guard cells, palisade mesophyll, spongy mesophyll, and epidermis again

2.xylem, phloem, guard cells, spongy mesophyll

3.the epidermis, spongy mesophyll, palisade mesophyll, and epidermis again

4.the epidermis, palisade mesophyll, spongy mesophyll, and epidermis again

Answers

Answer 1
I believe option 4 is the correct answer.
Answer 2

The layers of cells in a leaf should be in this order from top to bottom.

cuticle - epidermis - palisade mesophyll - spongy mesophyll- epidermis - cuticle

What is a cuticle and what does it do?

The cuticle is widely known for its roles as a diffusion barrier limiting water and solute transport across the apoplast and for protecting the plant from mechanical and chemical damage, pest and disease attack, as well as these other threats.

What function does the plant epidermis serve?

The protective tissue known as the epidermis covers the entire plant's surface and shields the beneath tissues from harm.

What are spongy mesophyll and palisade?Palisade mesophyll and spongy mesophyll are the two forms of mesophyll cells found in dicotyledonous leaves. Spongy mesophyll cells are internal to the lower epidermis, whereas palisade mesophyll cells are elongate and form a layer beneath the upper epidermis.

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Related Questions

PLZ HELP MEEEEEEEE I NEED TO FINISH THIS TO GO TO BED!!!!!!

Answers

Maybe some type of circular weather because the arrows are turning? I hope this helps

Coal is considered a nonrenewable resource because
A) it can never be replaced
B) it comes from the impact of meteors with the Earth
C) it was mismanaged by humans; it used to be a renewable resource
D) it takes millions of years to form

Answers

Answer:

D. it takes millions of years to form

Answer:

D) it takes million of years to form.

Explanation:

Renewable resources can replenish in a short period of time. However, coal can't. This is why it is a nonrenewable resource.

A rainbow happens when sunlight passes through water droplets in the air.
Which of the following best explains why? *
A. Water droplets of different sizes filter out light of different colors.
B. Different chemicals in the water get energy and give off light of different colors.
C. Light of different colors travels at different speeds through different-sized water
droplets.
D. Light of different wavelengths is bent at different angles.

Answers

Answer:

b may be right answe!

.......

HELP DUE IN 10 MINS!
All of the following are required for photosynthesis except:

a. Light

b. Chloroplasts

c. Oxygen

Answers

Answer:

chloroplast

Explanation:

light and oxygen are a crucial thing for plants

Answer:

c

Explanation:

:) have a nice day

Based on the information presented in the passage, which of the following conclusions can the reader make?


A

The weather today will be like the weather tomorrow.


B

Knowing the climate makes it easy to predict the weather.


C

If it is cold today, you almost certainly live in a cold climate.


D

Weather can change quickly, but climate changes slowly.


E

The climate in the desert is highly variable.

Weather is all around us. It is what happens from minute to minute. Rain and snow are examples of weather. Climate, on the other hand, is quite different. Climate is the pattern of weather experienced over a long period of time in a certain area. A region that has high temperatures over many years has hot climate. Knowing the weather can help you choose what to wear today. Knowing the climate can help a farmer choose what crops to plant.

Answers

Answer:

B . Knowing the climate makes it easy to predict the weather.

C . If it is cold today, you almost certainly live in a cold climate.

D . Weather can change quickly, but climate changes slowly.

Explanation:

If we know the climate of a particular region we can predict the weather of the next day or week of that region because climate is remain the same of a specific region. If the weather is cold it means that you live in a cold climate, similarly, if the weather is warm it means the climate of that region is warm and hot. Weather can change and has high variations whereas climate is the average atmospheric conditions of a region for a long period of time.

I need help this is due today thanks

Answers

Answer:

ribosomes - both

dna- both

cytoplasm - eukaryotes

no membrane organelles - prokaryotes

nucleus - eukaryotes

no nucleus - prokaryotes

uni or multi - both

membrane bound organelles - eukaryotes

mostly unicell - prokaryotes

2. Natural selection is an example of a mechanism of
evolution. Does this mechanism produce a change in
individuals or populations? Explain!

Answers

Answer:

Populations

Explanation:

It cannot change individuals. This is because it happens over many generations. E.g. Peppered moths camouflage with bark. Black moths do not, so they are easily seen by predators. The black moths are eaten because they do not have a desirable trait for survival. The black moths cannot then pass on the trait for black wings to their offspring. However, the peppered moths can pass on their trait for peppered wings to their offspring. Overtime, the population of black moths will decrease and most of the population will have peppered wings. The trait for peppered moths will be present even after many generations and black moths will be rare.

Choose the best statement about the expression “mutation is random, natural selection is not.”

A. Mutations are CAUSED by changed in the environment

B. Natural selection CAN favor some mutations and not others

C. Selection CAN’T change depending on the environment

D. Mutations for advantageous traits are less likely to be passed on the next generation

Answers

Answer:

B

Explanation:

Some mutations can be harmful or helpful depending on the environment.

Which of these phenotypes is affected by both environmental and genetic factors?

A: Tongue rolling

B: Blood group

C: Weight

D: Gender

Answers

I would say weight? If not then tongue rolling

Answer:

C. weight

Explanation:

Based on the weight of the phenotypes can affect the environment and genetic

It’s already over do so pls Help ASAP I WILL GIVE BRAINLIST If u answer all of them I have provided a diagram above for the questions... yes they have to be real answers no jokes pls...
7. Using the DNA sequences of the human, chimp, and baboon above, which species are
more closely related? |
8. How did you determine your answer above?
9. What is the method of comparing DNA sequences of species called?

Answers

7. Human and Chimp
8. The DNA bases of the chimp and the human match more closely in comparison to the baboon genetic link.
9. Comparative Genomics

Atmospheric carbon dioxide dissolves into ocen surface waters

Answers

Answer:

Carbon dioxide, which is naturally in the atmosphere, dissolves into seawater. Water and carbon dioxide combine to form carbonic acid (H2CO3), a weak acid that breaks (or “dissociates”) into hydrogen ions (H+) and bicarbonate ions (HCO3-).

Explanation:

A few students want to live healthier lifestyles. They decide to use one of the
following vegetable oils for cooking.
Type of oll
Polyunsaturated fat
(per 100 g)
11
49
Saturated fat
(per 100 g)
14
Olive oil
Maize oil
Coconut oil
Sunflower oil
2
50
16
85
13
Based on the information in the table, eating which type of oil would most
likely cause buildup in blood vessels?
O A. Maize oil
OB. Sunflower oil
O C. Olive oil
O D. Coconut oil

Answers

Answer:

D

Explanation:

Based on the information in the table, eating, the type of oil that would most likely cause buildup in blood vessels is coconut oil. The correct option is D.

What are oils?

Oils are liquid that is made from seed and leaves of plants, They are used to make food. Safflower oil, sesame oil, olive oil, and avocado oil are some healthier cooking oils that can sustain higher cooking temperatures.

They also include a variety of antioxidants, unsaturated fatty acids, and other substances that may be beneficial to health. Because it has a mild flavor, is generally available, and has a number of health benefits, coconut oil is a very popular product.

This oil has many uses because of how versatile it is. Even though coconut oil has emerged from years of widespread misinformation in recent years, it still doesn't always receive the respect it rightfully deserves.

Therefore, the correct option is D. Coconut oil.

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A person suffering from anemia feels tired in short walk, Why?​

Answers

Answer:

When you have anemia, your body doesn't produce enough red blood cells. You don't get enough oxygen, which makes you feel fatigued and can also cause serious health complications.

Explanation:

Help please :)
I know it’s not hard I just don’t wanna do it.

Answers

Answer:

Okay

Explanation:

Which of these is a response to an internal stimulus?

A. A sunflower turns to face the rising sun.
B. A cucumber tendril wraps around a wire.
C. A pine tree knocked sideways in a landslide grows upward in a bend.
D. Guard cells of a tomato plant leaf close when there is little water in the roots.

Answers

Answer:A a sunflower turns to face the rising sun.

Explanation:

I really need help on question two. ANY HELP WOULD BE KINDLY ACCEPTED!!!

Answers

Answer:

ok so all u need to do is explain how the cheerio gives the nutrients/energy like whats in it that gives u the energy thats all bb

Explanation:

There are an estimated ____-____ agricultural commodities produced in Florida.

Answers

Answer:

Over 300.

Explanation:

Over 300 agricultural commodities are produced from the agriculture sector in Florida because huge amount of land of Florida is used for agriculture. In Florida, many crops are grown due to suitable climatic condition and the food produced from these crops are used as a raw materials for producing 300 different food products in the industries so we can conclude that over 300 agricultural commodities are produced from the agriculture sector in Florida.

Carbon cycles through the biosphere in all of the following processes EXCEPT
a. photosynthesis
b. transpiration
c. burning of fossil fuels
d. decomposition of plants and animals

Answers

Answer:

B

Explanation:

because Transpiration is an important part of the water cycle.

What factors are important in judging how helpful an energy resource is to us?

Answers

Supply. Energy from nuclear, coal, gas, oil, and renewable sources reacts quickly in response to the available supply (or lack thereof). This is a key contributing factor to price fluctuations, which can occur on an hourly basis.

Demand. Demand for heating, cooling, light, and processes varies in response to demand in terms of economic, technological, and efficiency measures.

Gas Storage. This is a term for energy “inventory” (since you can’t store electricity), i.e. the difference between supply and demand. Gas injections and withdrawals are announced weekly, and prices adjust accordingly.

Weather Forecasts. The predicted weather forecast, as well as actual weather events, are important considerations, affecting spot market prices and short-term contracts. Whether the forecast becomes reality is less critical to longer-term prices.

Generation Changes. While seemingly more localized, these changes can have a broad effect on the markets.

Nuclear. Retirement of older plants as they require re-licensing can cause fluctuations.
Coal. Coal plant conversions to natural gas to avoid scrubbing-technology costs can also cause fluctuations.

Transport. Across the U.S. there are severe constraints in gas pipeline and electrical transmission capacity, which take time and investment to reverse. With the difficulty of transportation, prices rise.

Global Markets. Despite the massive growth in shale gas production, major changes in global oil supplies can affect U.S. domestic energy costs.

Imports and Exports. Global oil and gas prices determine relative profits suppliers can make selling fuels domestically or overseas. All energy prices are connected to some degree.

Government Regulation. Federal (FERC) and state (PUCs) regulations can change both supply and demand costs quickly and significantly, which, as noted above, affects the cost of energy.

Financial Speculation. Like most other traded commodities, energy prices can be affected significantly by financial speculation, which is the least transparent factor of all. If a market doesn’t seem to be following the direction indicated by supply or demand-related factors, the cause is almost always financial speculation, which is largely invisible and causes unexpected movements.

The factors which are important in judging the help fullness of energy resources to us are demand, storage of gas, weather forecast, nuclear and coal.

What are the important factors in judging the helpfulness of energy?

The first factor is demand for heating, cooling, light, and processes varies in response to demand in terms of economic, technological, and efficiency measures. The second factor is Gas Storage and this has a term for energy “inventory” (since you can’t store electricity), i.e. the difference between supply and demand. Gas injections and withdrawals are announced weekly, and prices adjust accordingly.

The third factor is weather forecasts that is used to predict the weather events which are important considerations, affecting spot market prices and short-term contracts. Weather the forecast becomes reality is less critical to longer-term prices and last is generation changes while seemingly more localized, these changes can have a broad effect on the markets.

Nuclear retirement of older plants as they require re-licensing can cause fluctuations and coal plant conversions to natural gas to avoid scrubbing-technology costs can also cause fluctuations.

Therefore, The factors which are important in judging the help fullness of energy resources to us are demand, storage of gas, weather forecast, nuclear and coal.

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Potato crops are grown for their carbohydrate content.
Describe how you could safely test the two species of potato to compare their carbohydrate content.

test for starch

test for reducing sugars


8 mark question - IGCSE

Answers

Answer:

I hope this helps a little bit.

What is the structure in the diagram?

Answers

Answer: A structure diagram is a conceptual modeling tool used to document the different structures that make up a system such as a database or an application.

Explanation:


Fungi form lichens by living in a close
relationship with an algae. The fungus provides a
protective home for the algae, and gathers mineral
nutrients from rainwater and from dissolving the
rock underneath. The algae gathers energy from
the sun using photosynthesis. Both organisms
share their nutrients with each other.
A. Commensalism
B. Parasitism
C. Mutualism
D. Competition

Answers

Answer: Commensalism

Explanation: Well you can already eliminate parasitism because that is when an organism leeches off another. Mutualism is when one organism needs to depend on another compared to A where both are benefited.  Then you can eliminate d because competition is when two organism compete with each other for survival not benefiting them both.

Suggest a molecular fix for a mutated CFTR channel. How would you correct it if you had the ability to tinker with it on a molecular level?

Answers

Answer:

normal and the mutant CFTR protein. How would you correct the mutant protein if you had the ability to tinker with it on a molecular level?

Corr-4a (bisamionomethylbithiazole C4) and VRT-325 were the first CFTR correctors discovered (quinazolinone C3 ). They are not, however, specific for CFTR and have been found to have low efficacy and high toxicity.

What is CFTR correctors?

Correctors are the type of CFTR modulator even a small molecule that binds to CFTR and improves its functionality. is referred to as a "corrector."

Correctors assist the CFTR protein in forming the proper 3-D shape so that it can move or traffic to the cell surface.

And over 1,700 CFTR gene mutations have been discovered. Some are common, while others are uncommon and found in only a few people.

A CF corrector is a chemical chaperone that increases F508del-CFTR levels on the cell surface.

VX-809 (lumacaftor) is the most effective symptomatic CF corrector to date, according to a series of CF correctors.

Thus, these are some molecules that can fix mutated CFTR channel.

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How do the properties of water help it to shape the Earth ?

Answers

Answer:

Water moving across the earth in streams and rivers pushes along soil and breaks down pieces of rock in a process called erosion. The moving water carries away rock and soil from some areas and deposits them in other areas, creating new landforms or changing the course of a stream or river.

Explanation:

What would happen if cytokinesis did not work properly?

1) DNA replication would not occur
2) A cell would have a nucleus with too many chromosomes
3) A cell would have two nuclei
4) New daughter cells would not have enough organelles or would be missing organelles
5) a cell would be smaller in size

Answers

Answer:

If cytokinesis did not occur during mitosis the cytoplasm wouldn't be divided and there wouldn't be two identical daughter cells as a result. so the cell would remain to be at rest not being able to separate into two individual cells

Which step happens first in DNA replication?

Answers

Answer:

Initiation

Explanation:

The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands. As the helicase moves along the DNA molecule, it continues breaking these hydrogen bonds and separating the two polynucleotide chains (Figure 1).

What do mitochondrial and thylakoid membranes have in common?

Answers

Answer:

Both membranes contain ATP Synthase Proteins.

3
The human body contains both bones and muscles. Bones are rigid, but muscles can contract
and relax to move the body. What explains this difference in body structures?
(1 Point)
A. Muscles are made of animal cells, and bones are made of plant cells
B. Bones and muscles are made of different kinds of animal cells
C. Bones contain more cells than muscles
D. Muscle cells form tissues, but bone cells do not

Answers

Answer:

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NEED HELP ASAP****

Which of the following is a potential drawback of heavy use of NPK fertilizers?
high soil pH
increase in nitrate levels
decrease in mineral salts
low levels of aluminum and manganese​

Answers

Answer:

b increase in nitrate levels

Explanation:

i will mark brainliest) Which of the following terms best describes when homologous pairs exchange segments of DNA during prophase I?
Diploid
Haploid
Crossing over
Homologous chromosome

Answers

Haploid is the answer
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