BIOLOGY STUDENTS, I NEED UR HELP.. Substances transported in the phloem are carried upwards in the stem at some time of the year and downwards at other times. Explain why substances are transported in the phloem upwards at one time of the year and downwards at another. *

Answers

Answer 1
during growing season when the plant photosynthesises (spring and summer) they travel down to the roots to be stored.
they go upwards when photosynthesis doesn’t occur (winter) to provide nutrients and cellular energy to parts like the leaves.

hope this is what you needed!!

Related Questions

A plant that has purple flowers is crossed with one that has white flowers. The offspring were half white and half purple. What were the
genotypes of the parents?
Рpx pp
Pp x Pp
PP x PP
PP xww
C

Answers

ppxpp i’m pretty sure

Choose the word that best completes each sentence.

Bacteria cells have a rigid cell
that gives the bacteria its shape.



The outermost structure of the bacteria cell is the
, which comes in contact with the environment.



Some bacteria have
, or whiplike tails that spin to propel them forward.

Answers

Answer:

1 wall

2 capsule

3 flagella

Explanation:

Just got this right :]

Answer:

1. wall

2. capsule not cell wall!!!!

3. flagella

Explanation:

don't put cell wall for number 2 i got it wrong

what are ionic bonds?

Answers

Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, or between two atoms with sharply different electronegativities, and is the primary interaction occurring in ionic compounds

Hope this helped :)
A chemical bond between two ions with opposite charges.

A cell that is placed in distilled (plain) water will swell up because it fills
with water. Which process causes the cell to swell?

Answers

Answer:

If a cell is placed in a hypotonic solution, water will move into the cell. This causes the cell to swell, and it may even burst. A hypertonic solution means the environment outside of the cell has more dissolved material than inside of the cell. If a cell is placed in a hypertonic solution, water will leave the cell.

Explanation:

I hope this helps! ^^

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When the Australian wildfires occurred, what short-term effect did the
ecosystem experience?
A. Plants and/or animals relocated or died.
B. All of the plants died but the animal population increased.
C. There was no effect on the ecosystem.
D. The trees grew back quick and the animals were not affected

Answers

Answer:

A. Plants and/or animals relocated or died.

Explanation:

Plants and animals will eventually come back, so that is a short-term effect on the ecosystem.

Hope this helps! :)

AQUATICS SCIENCE I need help please

Answers

Answer:

a spring

Explanation:

it is the source of the river

Answer: A spring.

Explanation:

explain why the biomass of foxes is less than the biomass of rabbits

Answers

Answer:

I hope and this result Will serve you

There’s more rabbits. They reproduce quickly. Rabbits pregnancy take 30 days and foxes take 60 days. So foxes take twice as long.

What happens to a cancer cell when it becomes damaged?

Answers

Answer:

More cells get produced to make the cancer worse, or if it breaks enough, it will break

Explanation:

Answer:

It will just multiply

Explanation:

How has law enforcement and U.S racially effected black communities.

Answers

Explanation:

For example , black people may be arrested more frequently in part because they experience greater poverty.

Where does the mRNA go after it is produced?​

Answers

Answer:

The mRNA goes after it is produced is made messenger RNA (mRNA) is a single-stranded RNA molecule that is complementary to one of the DNA strands of a gene. The mRNA is an RNA version of the gene that leaves the cell nucleus and moves to the cytoplasm where proteins are made.

Explanation:

mRNA formed in the nucleus is transported out of the nucleus and into the cytoplasm where it attaches to the ribosomes. Proteins are assembled on the ribosomes using the mRNA nucleotide sequence as a guide. Thus mRNA carries a “message” from the nucleus to the cytoplasm.

Meningitis may be transmitted from one person to another by:

water
sneeze
cough
soil

Answers

Answer:

cough!!!!

Explanation:

In the process of glycolysis, four ATP molecules are synthesized from four ADP molecules. Why does glycolysis not yield four molecules of ATP?

A TWO ATP molecules are lost in the cytoplasm.

B. Two ATP molecules are converted immediately back to ADP.

C. Two ATP molecules are required to start the process.

D. Two ATP molecules are absorbed in the mitochondria

Answers

Answer:

c

Explanation:

two ATP molecules are required to start the process. initially when glucose is phosphorylated it requires energy which is provided by the hydrolysis of ATP so 2 molecules are used up.

Glycolysis does not yield four molecules of ATP because two ATP molecules are required to start the process. Hence option C is correct.

What is ATP?

ATP stands for adenosine triphosphate. It is defined as an organic substance that fuels a variety of functions in living cells, including chemical synthesis, condensate dissolution, nerve impulse transmission, and muscular contraction. When the cell needs energy, ATP can be taken out and used to fuel processes or stored for use in later ones.

Glycolysis is defined as the pyruvic or lactic acid is produced as a result of the enzymatic breakdown of a carbohydrate using phosphate derivatives, and energy is stored in ATP's high-energy phosphate bonds. A linear metabolic process called glycolysis uses enzymes to catalyze reactions that break down glucose into two molecules of pyruvate or lactate depending on whether oxygen is present.

Thus, Glycolysis does not yield four molecules of ATP because two ATP molecules are required to start the process. Hence option C is correct.

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My test is timed, who ever answer this first will be Brainliest, How many genes for each trait does a child inherit?

Answers

Answer:

One allele for every gene in an organism is inherited from each of that organism's parents.

Explanation:

Answer:

These two copies of the gene contained in your chromosomes influence the way your cells work. The two alleles in a gene pair are inherited, one from each parent.

Explanation:

In two sentences explain the difference between incomplete dominance and complete dominance.

Answers

Answer:

In complete dominance, only one allele in the genotype is seen in the phenotype. In codominance, both alleles in the genotype are seen in the phenotype. In incomplete dominance, a mixture of the alleles in the genotype is seen in the phenotype.

Explanation:

Why do you only need one copy of a dominant trait gene to have that trait?

Answers

Answer:

Each gamete contains a single copy of every chromosome contains one allele for every gene. There for, each allele for a givin gene is packaged into a separate gamete. For example: a fly with the genotype Bb will produce two types of gametes:B and b

how do scientists know living things are related to eachother? (there are two way)​

Answers

Answer:

scientists can also analyze DNA to discover how closely organisms are related. Every living creature has DNA, which has a lot of inherited information about how the body builds itself. Scientists can compare the DNA of two organisms; the more similar the DNA, the more closely related the organisms.

Which geological feature can be created by a divergent boundary?

A) mid-ocean ridge, rift valley
B) mountain chains
C) earthquakes
D) volcanos

Answers

Answer:

A. Mid ocean ridge

Explanation:

A divergent plate boundary often forms a mountain chain known as a ridge. This feature forms as magma escapes into the space between the spreading tectonic plates.

The mid-ocean ridge, rift valley is a geological feature can be created by a divergent boundary. Therefore option A is correct.

A divergent boundary is a type of tectonic plate boundary where two lithospheric plates move away from each other. This movement creates a gap or space between the plates, allowing magma from the asthenosphere (the partially molten layer of the Earth's mantle) to rise and fill the void.

As the magma reaches the surface, it cools and solidifies, forming new crust. This process occurs primarily in the oceanic lithosphere, resulting in the formation of mid-ocean ridges.

Mid-ocean ridges are underwater mountain ranges that run along the seafloor and span across the Earth's oceans.

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helppppppp like frrrrrr

Answers

Answer:

A = rough er

B = chloroplast

D = Cytoplasm

C = most likely a lysosome

E = cell wall

4. What best describes the role of mutations in evolution?

a. Mutations are not necessary for evolution because they are not herita

b. Mutations are useful for evolution to occur because they promote ger

uniformity within a population.

c. Mutations are essential for evolution to occur because they produce

variations within a population.

d. Mutations are essential for evolution to occur because they are respo

environmental changes.

Answers

Answer: option C.

Mutations are essential for evolution to occur because they produce variations within a population.

Explanation:

This is because Mutation refer to change in the genetic content or DNA composition of organisms. Therefore , for evolution to occur there must be Mutation because it is the main source of genetic variation or causes genetic variation needed for evolution.

Mutation is important as the basics of evolution because it produce a new DNA sequence for a gene function, which lead to the formation of new allele.

How does reproduction impact plant growth and survival?

Answers

Answer:

nutrients are major determinants of plant growth and productivity in nature

Explanation:

_______ are chemical messengers that are produced in one body region but affect a different body region

Hormones
Enzymes
Neurotransmitters
Nucleic acids

Answers

Answer:

Hormones

Explanation:

Which of the following statements is true?
hurry please
A.The boiling point is higher for 100 liters of water than for 10 liters.
B.During deposition, a gas changes directly into a solid.
C.The condensation points for oxygen and hydrogen are the same.
D.All of the above.

Answers

Answer:

B. During deposition, a gas changes directly into a solid

Explanation:

First we can cross of A, because the boiling point is the same it just takes longer to get there.

So since A. is incorrect, that means D. has to be incorrect too. That leaves us with B. and C.

Finally, I already know what deposition is so since it is not D. it has to be B.

Yeast cells have 16 chromosomes and reproduce asexually. How many chromosomes would its diploid cell have?

Answers

Answer:

fourty six chromosomes

I think that 46 is the answer :)

There are two types of joints. One is movable and the other is called what?
flexible
muscular
immovable
optional

Answers

Answer:

Knee

Explanation:

I thinko

Immovable if I remember correctly

a) If Earth's history has lasted 4.6 billion years (4600 million years), and one calendar year has 365 days, how many years would be represented by one calendar day?

Answers

If we take the age of Earth—4.5 billion years—and compress it into one year 144 years would be 1 second

The number of years would be represented by one calendar day is to be considered as the 144 years.

Calculation of the number of years:

Since

Earth's history has lasted 4.6 billion years (4600 million years), and one calendar year has 365 days

So here it should be like 144 years

hence, The number of years would be represented by one calendar day is to be considered as the 144 years.

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Which is the preserved evidence of the activity of an organism a) cast b) mold c) fossil film d) trace fossil

Answers

Answer:

fossil film

Explanation:

A carbonaceous film or carbon film is an organism outline of a fossil. It is a type of fossil found in any rock when organic material is compressed, leaving only a carbon residue or film. ... Fossils usually form when sediment buries a dead organism.

The preserved evidence of the activity of an organism is trace fossil. The correct option is d.

What is trace fossil?

Animal behavior is what creates a trace fossil. A trace fossil might be something like a dinosaur footprint or an arthropod burrow. Beetles' pre-fossilization burrows can be seen as holes in this petrified wood.

When an organism leaves an impression in mud or sand, a trace fossil is created. Sediment dries out and becomes harder.

A fresh sediment layer has been added on top of it. The remnant fossilizes as the sediment hardens into rock as a result of cementation and compaction.

Body fossils are the hard parts of an individual creature or plant that have been preserved over time. Trace fossils are the best-preserved examples of an organism's past activity.

Thus, the correct option is d.

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Define the verb "adapt". Does survival in a particular environment through coping is synonymous with evolution? Why or why not?

Answers

Answer:

The word adapt means to get adjusted to a change.

yes, survival in a certain environment is similar to evolution. Both must use adaptation in order for life to keep living through changes in the environment. Each help life sustain itself in a very unique way.

Explanation:

The word adapt means to get adjusted to a change.

Yes, survival in a certain environment is similar to evolution. Both must use adaptation in order for life to keep living through changes in the environment. Each help life sustain itself in a very unique way. In evolutionary theory, adaptation is the biological mechanism by which organisms adjust to new environments or to changes in their current environment. Adaptation is the process of adjusting something to better match it's environment or situation. Evolution is a broad term that refers to any change in anything over time.

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Who was the first to try vaccination (NOT VACCINE BUT THE SIMILAR METHOD)

Answers

Answer:

Traditional Indian and Chinese medicinal

systems sometimes deliberately rubbed the

skin crusts from smallpox victims into the

the skin of healthy people. They thus hoped to

induce a mild form of smallpox that would

create resistance against the disease.

Answer:

Traditional Indian and Chinese medicinal

systems??

proteins are made at the ?blank

Answers

Answer:

below

Explanation:  Ribosomes cell

What is the name for the loose layer on top of soil created by fallen leaves and plant remains?

1. Topsoil
2. Loam
3. Litter
4. Humus

Answers

Topsoil layer

Sorry if I'm wrong

The name is topsoil.
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