which type of stimulus is an allergen, such as pollen?

Answers

Answer 1

Answer:

External stimulus is the type of stimulus an allergen, such as pollen, is classified.

Explanation:


Related Questions

the recommended daily allowance listed on the nutrition facts label is based on how much caloric intake?

Answers

Answer:

2,000-calorie daily diet.

Explanation:

An organism in its niche within an ecosystem is similar to?

A: a baseball player in his position on the baseball team.
B: the umpire not on a team.
C: the audience in the stands of a game.
D: the opposing team at a baseball game.

Answers

An organism in its niche within an ecosystem is similar to a baseball player in his position on the baseball team.

NICHE:

Niche in biology refers to the specific role or position of an organism in its ecosystem or habitat.

The niche of an organism is specific or particular to that organism and this enables it to adapt and survive in its environment.

This explanation shows that niche can be likened to a baseball player in his specific position on the baseball team.

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Answer: A: a baseball player in his position on the baseball team.

How does your body respond to an increase in the need for energy----why would you need more energy?

Answers

Your body circulates more blood and your heart beats faster.

You need more energy to do activities that take more effort.

pls give brainliest.

Which term means, "changes over
time"?
A. ecological disturbance
B. ecological succession
C. biodiversity

Answers

b. ecological succession

Amphibians, such as frogs, have adapted to have thin, very permeable skin that is well supplied with blood vessels. How does this adaptation most likely help amphibians survive in aquatic environments?
A. It allows them to maintain fairly stable internal temperatures.
B. It allows them to absorb nutrients directly from their environment.
C. It allows them to release chemicals into their environment to attract mates.
D. It allows them to take in oxygen and release carbon dioxide through their skin.

Answers

Answer:

to allow easier gas exchange

Explanation:

A student creates an experiment to determine the effects of oxygen on the growth of a water plant. The student fills three containers with water and adds an aquatic plant to each. Container 1 is open to the air, container 2 has a lid that prevents the exchange of air, and container 3 has a lid with a tube that pumps air into the container. After three weeks, the student observes that containers 1 and 3 have healthy green plants, while the plant in container 2 has not grown, and the leaves show browning areas.



Which explanation provides the reason for the difference in the growth of the plant in container 2?

Answers

Answer:c

Explanation:more oxygen

Answer:

yes

Explanation:

i took it

describe 2 ways that mitosis is important for your body.

Answers

Answer: your cells are extremely hard

Explanation:

true or false? local biogeochemical cycles are isolated within their particular ecosystem and all ions and molecules remain in that ecosystem permanently.

Answers

false! hoping i helped! :) oh and also, HAPPY HOLIDAYSSSS!

Please help!! What are Okazaki fragments?

Answers

Explanation:

Okazaki fragments are short sequences of DNA nucleotides (approximately 150 to 200 base pairs long in eukaryotes) which are synthesized discontinuously and later linked together by the enzyme DNA ligase to create the lagging strand during DNA replication.[1] They were discovered in the 1960s by the Japanese molecular biologists Reiji and Tsuneko Okazaki, along with the help of some of their colleagues

During DNA replication, the double helix is unwound and the complementary strands are separated by the enzyme DNA helicase, creating what is known as the DNA replication fork. Following this fork, DNA primase and DNA polymerase begin to act in order to create a new complementary strand. Because these enzymes can only work in the 5’ to 3’ direction, the two unwound template strands are replicated in different ways.[2] One strand, the leading strand, undergoes a continuous replication process since its template strand has 3’ to 5’ directionality, allowing the polymerase assembling the leading strand to follow the replication fork without interruption. The lagging strand, however, cannot be created in a continuous fashion because its template strand has 5’ to 3’ directionality, which means the polymerase must work backwards from the replication fork. This causes periodic breaks in the process of creating the lagging strand. The primase and polymerase move in the opposite direction of the fork, so the enzymes must repeatedly stop and start again while the DNA helicase breaks the strands apart. Once the fragments are made, DNA ligase connects them into a single, continuous strand.[3] The entire replication process is considered "semi-discontinuous" since one of the new strands is formed continuously and the other is not.[4]

[2]During the 1960s, Reiji and Tsuneko Okazaki conducted experiments involving DNA replication in the bacterium Escherichia coli. Before this time, it was commonly thought that replication was a continuous process for both strands, but the discoveries involving E. coli led to a new model of replication. The scientists found there was a discontinuous replication process by pulse-labeling DNA and observing changes that pointed to non-contiguous replication.

Answer:

but actually hope is going to read all of this

Explanation:

lol


Which is not a source of carbon dioxide gas?

Answers

Answer:oxygen.

Explanation: Photosynthesis does not produce carbon dioxide. It takes up carbon dioxide and water and releases oxygen.

you can find a nucleus in the cells of human,protists, bacteria and viruses

Answers

нєℓℓσ тнєяє!

Bacteria lack a nucleus, mitochondria, chloroplasts and organelles. Protists can either be single-celled or multiple called. They contain a nucleus surrounded by a nuclear membrane. The DNA or genetic material of a bacteria is not surrounded by a protective membrane known as a nuclear membrane.

I really hope this helps! Have an amazing day/evening/night!

Hugs, Kiwi <3

what is the advantage of plasmolysis to the terrestrial plants?​

Answers

Answer:

plasmolysis make the plants floopy, when water passes out through osmosis the plant become limb

Answer:

The cell can be restored quickly to its normal turgid condition simply by returning it to a dilute medium or water.
However, plasmolysis prevents normal water balance and other functions of the plant as a whole, and thus plants cannot tolerate prolonged exposure to medium more concentrated than their own cells.

A scientist fills a glass container with water and places an aquatic plant inside the container, then closes the lid and places the
container in direct sunlight. The scientist observes small bubbles on the surfaces of the plant's leaves on days 1 and 2, but no
bubbles on day 3. The scientist concludes that the bubbles were caused by photosynthesis. Which substance should be
added to the water in order for the bubbles to reappear? (1 point)

Answers

Answer: Are there any options? you either add C02 because it has run out gas or you and in minerals that also contain C02.

Explanation: you need C02 to have photosynthesis, so with a closed off lid,  the gas is going to eventually run out.

Carbon dioxide should be added to the water in the container in order for the bubbles to reappear in the glass container while placed in sunlight. Carbon dioxide is a component of photosynthesis.

What is Photosynthesis?

Photosynthesis is the process by which plants prepare their own food in sunlight and in the presence of carbon dioxide gas. Photosynthesis process takes place in the chloroplast of cells.

Photosynthesis is an anabolic reaction in which carbon dioxide and water reacts in the presence of sunlight which is trapped by the chlorophyll present in the leaves of plant to produce glucose (carbohydrate) and oxygen gas, which is later utilized in the process of respiration.

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Carbon in the atmosphere (CO2)

Carbon in plants and animals

It must move through at least 5 different living things (plants/animals) - be sure that the plants/animals would actually interact with each other in nature (ex no african lions eating arctic foxes) this may require a bit of research.

Extra credit - show it becoming fossil fuels and the fossil fuels being burned to release CO2 back into the atmosphere.

In plants/animals- either how its stored in the plant/animal then the plant/animal being eaten or the steps of cellular respiration

In plants- the steps of photosynthesis (how it goes from being CO2 to glucose)
Paragraph / written story

Answers

Carbon in air is usually 2-3% but some plants have can stay with 5%
Pls can you put this answer like Brainly answer

1) compare all three states of matter to the
right. Which square has the greatest density
and why? And why is it correct?

Answers

Answer:

A

Explanation:

it has more matter in given area, so it is denser.

A ____ is the coding and
is the trait.

Answers

The genetic code dictates which proteins the cell manufactures. Proteins are strands of amino acids. The sequence of nucleotides in DNA genes determines the order of amino acids in a protein. This is the direct connection between your genes and your traits.

what energy carrying molecule is created when the chemical bonds of glucose are broken

Answers

ATP ( adenosine triphosphate )

By oxidizing glucose and other dietary molecules in a step-by-step manner, ATP and NADH are produced as chemical energy.

What is ATP?

A vital "energy molecule" present in all living things is adenosine 5′-triphosphate, also known as ATP and typically written without the 5′-. In particular, it is a coenzyme that transfers energy to cells by releasing its phosphate groups when it interacts with enzymes like ATP triphosphatase.

By adding a phosphate group to another molecule, ATP can drive biological operations (a process called phosphorylation). Special enzymes are responsible for carrying out this transfer, which connects the cellular processes that need energy to the release of energy from ATP.

A variety of cellular functions, such as ion transport, muscular contraction, the transmission of nerve impulses, substrate phosphorylation, and chemical synthesis, all require energy and hence use ATP. A large demand for ATP is generated not just by these processes but also by others.

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A classmate states that both energy and matter can be created during photosynthesis and cellular respiration. Is this true? Explain

Answers

No, the chemical equations for both processes are evidence that matter and energy or neither created nor destroyed

Energy and matter are also produced during photosynthesis.Chemical energy in the form of glucose and matter in the form of oxygen gas are produced during photosynthesis.Since these are the results of the reaction, they are regarded as process outputs.

Can both energy and matter be created during photosynthesis?

Some cells employ a process called photosynthesis to convert light energy into food.Because it enables plants to produce the food required for the rest of the ecosystem, photosynthesis is crucial.Producing organisms, or those that grow their own sustenance, are plants.The foundation of the ecosystem is formed by producers, who transform solar energy into chemical energy in the form of food for themselves and other ecosystem inhabitants.Although many ecosystems are dominated by plants, other organisms are also capable of photosynthesis.Some bacteria and algae are capable of photosynthesizing, and these organisms are the producers in their ecosystem. A biological process called photosynthesis consumes both matter and energy.The world's physical components are made of matter.The capacity to perform work is energy.By use of various mechanisms, matter and energy can be switched for one another.On the other hand, neither matter nor energy can be generated nor destroyed.The first law of thermodynamics is that they constantly evolve into new forms.All processes in the universe operate in this manner.Energy can be transformed into a variety of forms.Several instances include:Chemical drivekinetic energythe potential energy of gravityelastic force The substance and energy persist even after an organism dies.Instead, they are changed into other forms.For instance, both matter and energy are components of plants.Fungi and bacteria in the soil aid in the breakdown of a plant's internal substance into its constituent parts when it dies.These can be used by newly sprouting plants by being recycled into the soil.As a result, neither the energy nor the substance is wasted; rather, they are transformed into new forms.

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Why a cell spends the majority of its time in interphase.

Answers

A cell spends the majority of its time in interphase because during this period the cell grows and synthesizes materials required during and after its division. During interphase, the cell duplicates its genetic material.

The cell cycle can be divided into a long interphase and a short mitotic (M) phase.

The interphase can in turn be divided into three phases: Growth 1 (G1) phase,  Synthesis (S) phase and Growth 2 (G2) phase.

During the S phase, the cell duplicates its genetic material, which is sharply controlled by different cellular mechanisms (e.g., checkpoint mechanisms).

During G1 and G2 phases,  the cell synthesizes all the proteins required during the M phase and after cell division.

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What is it called when water moves through pores in soil?

Answers

Answer:

percolation,

Explanation:

Movement of water into soil is called infiltration, and the downward movement of water within the soil is called percolation, permeability or hydraulic conductivity. ... Pore space. Spaces in soil, between the mineral and organic matter, that are filled with water or air.

Which situation would increase the fluidity of a

phospholipid bilayer?

A. decreasing the temperature

B. increasing the number of proteins

C. increasing the number of cholesterol molecules

D. increasing the number of unsaturated fatty acids

Answers

Answer:

C

Explanation:

Cholesterol molecules stay in between fatty acid tails preventing them from sticking together

The situation that would increase the fluidity of the phospholipid bilayer is increasing the number of cholesterol molecules. The correct option is C.

What is a phospholipid bilayer?

A phospholipid bilayer is a layer around a cell. The cell membrane is composed of a bilayer of phospholipids. It contains fatty acids and alcohol.  

Bilayers of phospholipids are essential parts of cell membranes. The lipid bilayer serves as a physical barrier to the entry and exit of molecules and ions from the cell. However, allowing the selective transit of specific substances into and out of cells is a crucial role of the cell membrane.

Cholesterol is present between fatty acid molecules and prevents them from sticking to each other.

Therefore, the correct option is C.  increasing the number of cholesterol molecules.

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what is dropped off at the lungs by the blood vessels

Answers

Answer:

carbon dioxide

Explanation:

Epinephrine mediates the fight-or-flight response of the body. One of the effects is to increase the amount of glucose available to muscles. What does the signaling pathway triggered by epinephrine cause to occur in liver cells

Answers

Answer:

In liver and muscle cells, epinephrine stimulates the release of glucose from glycogen by inhibiting glycogen synthesis and stimulating glycogen breakdown.

Explanation:

My aunt works in the medical field, so I asked her. Hope this helps whoever needs it.

when a tautomeric shift occurs, what is true about the resulting mutation?

Answers

When a tautomeric shift occurs, then the resulting mutation ALWAYS changes a purine to a purine or a pyrimidine to a pyrimidine. A tautomeric shift may lead to a point mutation.

A mutation is any alteration in the nucleotide (DNA) sequence of the genome of an individual.

A tautomeric shift can be defined as a temporary change in the nucleotide base structure.

A transition mutation is a point mutation of one purine or pyrimidine base pair to the other purine/pyrimidine that occurs when one nucleotide base undergoes a tautomeric shift during DNA replication.

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Explain what is wrong with the cells shown in the image below.

Answers

Answer:

wrong answer

Explanation:

it doesn't show any thing that why its wrong

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