When someone is infected with cholera, the cholera toxin acts as a

A. ligand
B. receptor
C. cellular response
D. nucleus

Answers

Answer 1

Answer:

I think it acts as a receptor

Answer 2
B. Receptor ok ok ok ok ok ok

Related Questions

which of the following can cause polyploidy
A : a single egg fertilized by two sperm
B: a diploid egg being fertilized by a normal sperm
C: a normal egg being fertilized by a diploid sperm
D : all of the above ​

Answers

Explanation:

a polypiody is a condition that has more than 2 sets of chromosomes. common in plants..

Hey, I need help with this question:

Answers

Answer:

(D) two different species on the basis os reproductive behaviour

BRAINLIST PLS

An man about 80 years old, lives alone. He looks very weak and undernourished. His lower limbs bones are tender and thin. Due to poor diet and loneliness, he lacks the essential vitamins and minerals for his bone formation. Explain bone formation (ossification) , and bone marrow formation which this man is lacking.​

Answers

[tex] \large \text{Answer} \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ [/tex]

All bone formation is a replacement process. During development, tissues are replaced by bone during the ossification process. In intramembranous ossification, bone develops directly from sheets of mesenchymal connective tissue. In endochondral ossification, bone develops by replacing hyaline cartilage, bone formation, also called ossification, process by which new bone is produced. ... Soon after the osteoid is laid down, inorganic salts are deposited in it to form the hardened material recognized as mineralized bone. The cartilage cells die out and are replaced by osteoblasts clustered in ossification centres.

Hope it helps you

Mark and Michelle both have dark hair, which is a dominant trait. But their first child is blonde. Which is the most likely explanation

Answers

Both parents have a recessive blonde allele that got passed on to their child.

Another gene caused the alleles for brown hair to deactivate.

It's not possible--Mark can't be the real father.

One of the two has a blonde allele that is dominant in the child.

Answer:

They are heterozygous for the dark hair.

Which side is hypertonic ? A or B ?
Which side will gain water
What is c ?

Answers

Answer:

1-b

2-b

3-phospholipid bilayer

B side is hypertonic. It will gain water. C is Phospholipid layer.

What is Hypotonic Solution?

A hypotonic solution is a type of solution that has a lower osmotic pressure than any other solution to which it is compared. It is a solution in which a small amount of solute passes across a semipermeable membrane compared to the amount of solute in the other solution.

If the solute concentration outside the cell is lower than inside the cell, these solutes cannot cross the membrane, so the solution is hypotonic to the cell.

The cell membrane consists of a phospholipid bilayer containing embedded proteins present between these two solutions where a hypotonic solution has a relatively low concentration of solutes.

Thus, B side is hypertonic. It will gain water. C is Phospholipid layer.

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explain why calcuim and phosphorus from bone are important to the human body

Answers

Answer:

the mineral calcium helps your muscles, nerves, and cells work normally. Your body also needs calcium (as well as phosphorus) to make healthy bones. Bones are the main storage site of calcium in the body

What do you think would happen if the mitotic spindle did not function correctly?

Answers

Answer:

The presence of extra centrosomes leads to the formation of a multipolar mitotic spindle, which, if not corrected prior to anaphase, results in the segregation of chromosomes into more than two daughter cells.

Explanation:

Hemolysis is:

O A) when a red blood cell is in a hypertonic solution and the cell ruptures

O B) when a red blood cell is in a hypotonic solution and the cell ruptures

O C) when a red blood cell is in a hypotonic solution and the cell shrinks

O D) when a red blood cell is in a hypertonic solution and the cell shrinks

Answers

A) When a red blood cell is in a hypertonic solution and the cell ruptures

57- From classes of Phylum: Annelida
A- Cestoda
B- "Trematoda
C- Myriapoda
D- Oligochnota​

Answers

Answer:

D- Oligochnota.

......

what is the cytoplasm job in the factory?

Answers

Answer:

factory floor!

Explanation:

function:

Contains the organelles; site of most cell activity.

El acero es homogénea,heterogénea,elemento,compuesto?

Answers

Answer:

El acero es una mezcla homogénea, sin embargo, está hecho de hierro y carbono. Una sustancia pura es diferente de una mezcla homogénea porque una sustancia pura tiene un solo componente.

Which RNA molecule is involved in translating a short sequence of RNA into an amino acid, acting like a molecular Rosetta stone?
a
snRNA

b
tRNA

c
mRNA

d
rRNA

Answers

Given what we know about the translation process, we can confirm that the RNA in question that aids in the process of translating a short sequence of RNA into an amino acid is mRNA.

mRNA is referred to as messenger RNA. This RNA molecule acts as just that, a messenger carrying the necessary code to create amino acids and therefore, proteins. This messenger binds itself to the ribosomes of a cell, which are in charge of reading the code, one codon at a time, and chaining together the corresponding amino acids.

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The movement of the outer core is
important to life because...

Answers

Answer:

he movement causes powerful electric currents to develop in the liquid iron itself.

Explanation:

brian period occurred approximately 500 million years ago, and we are currently in the Quaternary period.
PERIOD
ANIMALS
PLANTS
Humans
Flowering
plants
Mammals
Birds
Ginkos
Quatemary
Tertiary
Cretaceous
Jurassic
Triassic
Permian
Pennsylvanian
Mississippian
Devonian
Silurian
Ordovician
Cambrian
Reptiles
Pines
Amphibians
Club mosses
Horsetail rushes
Fems
Animals with shells
Fishes
Based on the chart, describe the trends that can be observed in animal and plant fossils as they evolved over time.
Use evidence from the chart to support your conclusions.
B IV x x Font Sizes
А 三星 三 三
А

Answers

Quaternary is the correct answer

Which one of the following fuels directly produces CO2 but is considered carbon neutral?

Question 2 options:

a)

Wind


b)

Biomass


c)

Oil


d)

Coal


e)

Hydropower

Answers

Answer:

A. wind

B. coal

Explanation:

there are two fuels directly produces CO2 but is considered carbon neutral which are wind and coal

The trapezius is a(n) _____ to the pectoralis major.

Answers

Answer:

complement

Explanation:

The trapezius is a complement to the pectoralis major.

What is Trapezius?

The trapezius may be characterized as one of the widest and most superficial muscles that are located in the upper back and trunk region. It is triangular in structure, wide, and thin that encircles the upper back of the shoulders and neck.

While the pectoralis major is the most superior and largest muscle that is located within the region of the anterior chest wall. This muscle is thick, fan-shaped in appearance positioned beneath the breast tissue, and constructs the anterior wall of the axilla.

Both of these muscle types complement each other in every aspect such as location, structure, appearance, etc.

Therefore, The trapezius is a complement to the pectoralis major.

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Punnet Squares

A couple have 4 children, their first child has blood type A. the second child has blood type O. The third child has blood type AB, and the fourth has blood type B. What are the genotypes of the parents?

Answers

Answer:

a and ab blood types

Explanation:

L 3.2.2 Quiz: Matter and Energy
Question 5 of 10
Which substance is an example of organic matter?
A. Carbon dioxide
B. Oxygen
C. Salt
O
D. Sugar

Answers

Answer:

D

Explanation:

An example of organic matter is sugar

D is the correct answer. Sugar is an example of Organic matter.

Carbon dioxide is inorganic. Oxygen is neither while salt is inorganic.

When an unbalanced force acts on an object, in which direction does the object
move?
The object moves in the direction of the net force.
The object moves in the direction of the smaller force.
The object moves in the opposite direction of the unbalanced force.
The object moves in the direction of the unbalanced force.

Answers

Answer:

Explanation:

The object moves in the direction of the net force.   It depends on what you have been told. I would say that A is the correct answer.

^

|

|===================>

A

Both the forces shown above are unbalanced. But the object will not move in the direction of either of them. The net force is somewhere between the two given forces and that's the direction of the motion.

A person who has type AB blood:

Answers

Answer:

B-positive (B+): 9%

AB-positive (AB+): 4%

A-positive (A+): 30%

If each of these food chains start with 10,000 grams of phytoplankton, how much reaches the highest trophic level in each food chain

Answers

Energy is transferred from one trophic level in a food chain to another. However, not all the energy available at a trophic level is transferred to the next.

Only about 10% of the energy in the lower trophic level gets to the immediate higher trophic level and the rest is lost as metabolic heat.

Thus, if a food chain starts with 10,000 grams of phytoplankton, the quantity that will get to the highest trophic level would depend on the number of intermediate trophic levels in between the lowest and the highest.

For every step the energy is transferred up the trophic level in the food chain, 90% of it is lost.

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Which method of timber harvesting removes all trees from the harvest area?

Answers

Clear-cutting is the most common method of timber removal. Clear-cutting removes all the trees in a given area, often by using large machinery. From an economic standpoint, the benefit of this approach is that humans can harvest maximum timber with minimal energy and cost.

if bird cannot migrate what it does to survive

Answers

If a bird can not migrate, it must adapt to thrive on foods that are available in different seasons.

Researchers identify a gene in cockroaches that is responsible for their ability of nerve regeneration. How might it be possible for this gene to be used in treating human paralysis?

Answers

This gene could be analyzed to determine its homology level with a human gene, which then could be restored in its normal expression. This strategy can restore the normal phenotype in defective human cells.

Sequence homology, which refers to the level of evolutionary relationship among genetic or proteins sequences, is a fundamental subject matter to determine gene function.

From this approach (sequence homology search), researchers can identify valuable genes involved in diseases in which the restoration of their normal expression levels can be used to restore the normal phenotype in defective cells.

In this case, the identification of a gene in cockroaches that is responsible for nerve regeneration could be used for subsequent identification of a human homologous gene sequence, which then can be restored in order to treat human paralysis.

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How the plants survive in tropical rainforest?

Answers

Answer:

The plants have adapted to the rainforest environment by growing their roots deep into the ground and extending their leaves high into the tree canopy to receive sunlight for photosynthesis. Mant plants have adapted to the immense amount or water they are exposed to in their environment.e

Matter begins to move through this food chain when the?

Answers

Answer: When the energy of the sun is captured by plants.

If you make mutations in the nuclear localization signal of a nuclear protein, what will happen to the protein

Answers

Answer:

What would happen if the operator sequence of the trp operon contained a mutation that prevented the repressor protein from binding to the operator? a. In the absence of tryptophan, the genes trpA-E will not be transcribed. b. In the absence of tryptophan, only genes trpE and trpD will be transcribed. c. In the presence of tryptophan, the genes trpA-E will be transcribed. d. In the presence of tryptophan, the trpE gene will not be transcribed.

Explanation:

Which of the following examples best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem?
Choose 1 answer:
Choose 1 answer:

(Choice A)
A
A frost in late spring kills some of the earliest budding plants and flowers in a field.

(Choice B)
B
Tens of thousands of geese rest for a week at a large lake during their annual migration.

(Choice C)
C
The failure of a 60-year-old beaver dam floods a downstream meadow.

Answers

i would say C. resting isnt really going to change anything, they are still migrating and only SOME of the budding plants were killed not all.

The failure of a 60-year-old beaver dam floods a downstream meadow  best describes a disturbance that is likely to result in significant, long-lasting changes to an ecosystem

It cause immense damage to the property, habitats due to water flooding over them.

What is a dam?A dam is a barrier that stops or restrict the flow of surface water or underground streams.It is build across the stream or river to hold water back.It can used to store water, control floods and generate electricity.

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which describes fat?
A. a lipid that stores energy
B. a nucleic acid that directs cell function
C. a protein that speeds up a chemical reaction
D. a carbohydrate that produces energy​

Answers

A lipid is fatty acids which falls under fat , and lipids store energy hence A being the answer

Answer:

The answer is A

Explanation:

a lipid that stores energy

Which three structures are found in both prokaryotic and eukaryotic cells?

A. cytoplasm, endoplasmic reticulum, DNA
B. ribosomes, DNA, cytoplasm
C. nucleus, cell wall, cell membrane
D. cell membrane, endoplasmic reticulum, ribosomes

Answers

The answer is B. Prokaryotes do not have endoplasmic reticulum, cell wall, cell membrane or a nucleus. But they do have DNA (just not in a membrane bound nucleus), ribosomes, and cytoplasm.

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