How did scientists prove that the food is transported through the phloem

Answers

Answer 1

Answer:

When a aphid is killing at the act of feeding then the body is carefull cut away but the proscis still inserted into the phloem then the food slowly exuded form cut end of the proboscis in the form of drops. These drops contain sugar and amino acids which means food is transported through phloem in plant.


Related Questions

17) The function of the kidneys is to cleanse the blood. To do that, kidneys filter almost everything from the blood, and then put most everything back in to the blood. One of the
substances filtered and then put back is glucose. If a doctor notices that there is glucose in a patient's urine sample, then what would be a reasonable explanation?
1. The patient must be on a low carbohydrate/high protein diet.
II. The patient has too many carbohydrates in his/her blood.
111. The patient is dehydrated.
IV. The patient has diabetes.
A) I only
B) il only
I and II only
D) II and IV only

Answers

Answer:

I think its II and Iv

Explanation

Because when they is glucose in a patient's urine it means that the patient has diabetes or are too many carbohydrate in his or her blood

if a patient eat too much food containing carbohydrates ,the digestive system breaks down the digestible one into sugar which enters the blood. As blood sugar level rises ,the pancreas produces insulin(a hormone that prompt cells to absorb blood sugar for energy or storage)

Which of the following represents the initial stage of learning in the process of conditioning? A. Acquisition B. Generalization C. Discrimination D. Stimulus contiguity Please select the best answer from the choices provided A B C D.

Answers

Answer:

A

Explanation:

Aquistion

throughout the ___________, a healthy dietary pattern can help minimize diet-related chronic disease risk.

Answers

Answer:

pregancy

Explanation:

Throughout the life, a healthy dietary pattern can help minimize diet-related chronic disease risk.

What are chronic diseases?

Chronic diseases are those who required long term treatments.

Examples are cancer, heart diseases, diabetes, or any disability.

These diseases need treatments in phases or sometimes the treatment is lifetime.

To avoid chronic diseases, we should follow a healthy lifestyle.

Thus, the fill in the blank is life.

Learn more about chronic diseases

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what is the function of cholesterol in the cell membrane?

Answers

Answer:

It reduces the permeability of the cell membrane

these tiny blood vessels transport absorbed nutrients.

Answers

Answer:

we called them capilary

Answer:

Capillaries

Explanation:

Capillaries are tiny blood vessels which transport absorbed nutrients, blood, and oxygen to all cells in the human body. They also connect arteries and veins together.

During which phase(s) of mitosis are structures like the one shown in Figure 10–2 visible?

Answers

Answer:

Prophase

Explanation:

Not 100% sure though.

Answer:

Prophase

Explanation:

During prophase, chromosomes condense which is why it looks like that

The Chemical composition of the cell membrane

Answers

Answer:

cell membrane

Explanation:

Cell membranes are composed primarily of fatty-acid-based lipids and proteins. Membrane lipids are principally of two types, phospholipids and sterols (generally cholesterol).

I need to know FAST


The failure of homologous chromosomes to separate properly during meiosis
s called
a. Hondisjunction
C. Autosomnes
b. Crossing Over d. Karyotype

Answers

Answer:

Nondisjunction

Explanation:

Nondisjunction occurs when homologous chromosomes or sister chromatids fail to separate during meiosis, resulting in an abnormal chromosome number. 

40 Points to answer this question in complete sentences
How has the global climate changed in the last century? What has the greatest impact on the climate where you live? Have humans influenced the climate on Earth? If so, how and what should we do?

Answers

Answer:

Over the last century, the average temperature on the surface of the Earth has increased by about 1.0 degrees F.   The greatest impact is the droughts that my state is constantly in. I believe that we had a great part in global climate change. How I think that we have is all the air pollution and not taking care of out earth the way we should.  How I think that we can fix this is if we start powering our home with more solar. We can also reduce the amount of water that we use.  

Explanation:

label the parts of the microscope​

Answers

Answer:

1. Ocular lens
2. Body tube
3. Head
4. Nosepiece
5. Objective lenses
6. Stage
7. Diaphragm
8. Condenser
9. Microscopic illuminator
10. Arm
11. Inclination joint
12. Base


Hope this helped:)

what was life like for the native americans after they were relocated west to indian territory

Answers

hmmm what is it mhmhmhmm

The organelles of eukaryotic cells interact with each other to maintain homeostasis within the cell. The nucleus, endoplasmic reticulum, Golgi apparatus, chloroplasts, and mitochondria all contribute to protein transport, packaging, export, and energy harnessing. According to the endosymbiotic theory, certain organelles are proposed to have evolved from free-living bacteria that were engulfed by a larger cell. These organelles have multiple membranes, their own circular DNA, and can replicate by binary fission. The origin of which organelles are likely explained using the endosymbiotic theory?

Answers

Answer:

mitochondria and chloroplast

Explanation:

USA test prep

Answer:

mitochondria and chloroplast

Explanation:

I did it

which animal is one of only two mammals that lay eggs?

Answers

Answer:

The platypus

Explanation:

Answer: Duck-billed platypus.

Explanation:

I took the test and got 100%!

why did the early atmosphere not have much oxygen?

Answers

Answer:

The oxygen did not build up in the atmosphere for a long time, since it was absorbed by rocks that could be easily oxidized (rusted). To this day, most of the oxygen produced over time is locked up in the ancient "banded rock" and "red bed" rock formations found in ancient sedimentary rock.

if the body cells in individuals of a species have homologous pairs of chromosomes, the species is most likely to be
a.eukaryotic
b. haploid
c. diploid
d. prokaryotic ​

Answers

The answer is C: Diploid (meaning there are 2 sets of chromosomes, one set from maternal and one set from paternal)

One CHROMOSOME from each SET will form a homologous pair


La Niña is an example of a
O natural short term change
O natural long term change
O manmade greenhouse effect
O manmade short term change

Answers

The last one d I think

According to the chemiosmotic hypothesis, mitochondrial ETCs are organized so that _________ move across the inner membrane from the mitochondrial matrix to the intermembrane space as _________ are transported down the chain.

Answers

Answer:

Explanation:

Heres where to get your answer

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Which of these choices is a benefit of the Endangered Species Act?

A. Can prohibit removal of dangerous animals
B. Can interfere with economic progress
C. Can cost a lot of money to enforce
O D. Can save species from extinction

Answers

Answer:

D. Can save species from extinction

Explanation:

As saving species from extinction is what Endangered Species Act would want as endangered means that the animal is close to dying and is in danger of being there no longer

Benefits of the Endangered Species Act can prevent the extinction of certain species. So, the correct option is D.

What is Endangered species Act?

One of America's most important and effective environmental legislation is the Endangered Species Act. It shows that Americans are willing to cooperate in order to preserve and safeguard the species that are most in danger of going extinct for good.

For landowners, government organisations, and concerned citizens, the legislation offers reasonable, well-balanced options for preserving endangered wildlife and its ecosystems. There are three crucial components in it:

1. Preventing harm or extinction of the listed species

2. Creating strategies to reestablish healthy populations

3. Protecting habitat, which is crucial to the survival of these species.

Therefore,  the correct option is D.

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Which RNA is directly responsible for catalyzing the peptide bond between amino acids during translation

Answers

Ribosomal RNA (rRNA) is directly responsible for catalyzing the peptide bond between amino acids during translation.

I learned that prayer is _______ to god, who is never busy to hear my prayers.​

Answers

Answer: I learned that prayer is talking to god, who is never busy to hear my prayers.

Explanation:

which set of parents did the offspring come from?

Answers

Answer:incian.

Explanation:

define work , in short answers ​

Answers

Work-a physical manor of doing something that brings home income, or improves your life.

will you be able to synthesize both strand of the dna helix in a continuous manner?

Answers

Answer:

No.

Explanation:

There are two strands in DNA -i)Leading strand

ii)lagging strand.

Replication of the leading DNA strand is continuous, while replication along the lagging strand is discontinuous. After a short length of the DNA has been unwound, synthesis must proceed in the 5' to 3' direction; that is, in the direction opposite that of the unwinding.

No, we will not be able to synthesize both strand of the dna helix in a continuous manner because the lagging strand synthesize in a discontinuous manner.

What is the process of DNA synthesize?

The biological process of creating two identical copies of DNA from a single original DNA molecule is known as DNA replication. All living things replicate their DNA, which is the most crucial component of biological inheritance.

Continuous DNA synthesis takes place on the leading strand. As the helix unwinds, DNA synthesis on the lagging strand restarts numerous times, resulting in numerous brief pieces known as "Okazaki fragments," which are then joined by DNA ligase to form a single DNA molecule.

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which hormone increases acid secretion by the stomach?

Answers

Answer:

gastrin

Explanation:

During meal ingestion, the main hormone responsible for stimulating acid secretion is gastrin, which acts primarily by releasing histamine from enterochromaffin-like cells.

What is protista ???

Answers

Answer:

Protista is a kingdom or large grouping that comprises mostly single-celled organisms such as the protozoa, simple algae and fungi, slime moulds, and (formerly) the bacteria. They are now divided among up to thirty phyla, and some have both plant and animal characteristics.

Which of the following food items would be the most energy efficient to eat?
A. Grilled chicken
B. Steak
C. Apple
D. Shark fin soup

Answers

Answer:

Apple

Explanation:

The food item that would be the most energy efficient to eat is an Apple. The correct option is C.

What do you mean by energy-efficient?

The meaning of energy-efficient is the objects that have high energy but are low in calories. Fruits and vegetables have ample amounts of energy and are good sources of natural sugar. These items are good for health and provide energy at the same time.

The food items that are given are grilled chicken steak, and shark fin soup are all non-veg items, and contain a large amount of fat in them. But apple is a fruit, and it is low calorie and rich in fibers and energy.

Thus, the correct option is C. Apple regarding the food items that would be the most energy efficient to eat.

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Which of the following is (are) part of a systemic immune response?
I. A fever
II. An increase in white blood cells in the body
III. An inflammatory response
I only
II only
III only
I and II only
I, II, and III

Answers

Answer:

The answer is I ,II and III

define osmoregulation​

Answers

Answer: OK!

Explanation: Osmoregulation is the active regulation of the osmotic pressure of an organism's body fluids, detected by osmoreceptors, to maintain the homeostasis of the organism's water content; that is, it maintains the fluid balance and the concentration of electrolytes (salts in solution which in this case is represented by body fluid) to keep the body fluids from becoming too diluted or concentrated.

Hope i helped! :D

Scientists create models to help make sense of the natural world. Models are powerful tools that help scientists predict how things work. Models should be scientifically testable. When a model fails to predict correctly, the model must be revised or replaced. A good example of this kind of model would be one that represents an animal or plant cell as drawing to illustrate the parts of the cell.

Answers

Answer:

The answer is C, two dimensional module

Explanation:

I took the k12 test.

How does diffusion occur without any Energy?

Answers

Answer:

it moves from a stronger region of concentration to a weaker region of concentration so therefore does not call for or require energy

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