Why is the tundra the most fragile biome?
a- extreme conditions
b-large human population
c-vast food web
d-large amounts of rain, washing pollutants into water sources

Answers

Answer 1

Answer:I’d say a

Explanation:

It’s a super cold place

Answer 2
Answer: I’ll say A only because...


Explanation: It’s extremely cold there

Related Questions

How do abundant growth and care resources affect ecosystem?

Answers

Answer:

over exploitation

Explanation:

In animals, respiration takes place through cellular interaction using ...__ *

Answers

Answer:

Cellular respiration?

Explanation:

The tropical regions are warmer than the polar regions due to the angle of the Sun's rays. As a result, there is generally higher pressure at the poles and lower pressure at the equator, so which way does the wind blow on Earth's surface.... Answers --> A. The wind blows cold air toward the equator from the poles.... B. The wind blows warm air from the poles to the equator..... C. The wind blows cold air from the equator to the poles...... D. The wind blows warm air from the equator to the poles ​

Answers

The
Answer is Letter B

The wind blows warm air from the poles towards the equator on the surface of the Earth. So, the correct option is B.

What is Wind?

Wind is defined as the natural movement of air or other gases relative to a planet's surface which occurs on a variety of scales, from thunderstorms lasting tens of minutes, to land masses lasting a few hours. The wind blows warm air from the poles towards the equator on the surface of the Earth.

Global winds result from differences in the absorption of solar energy between climate zones on Earth, to local breezes that results from the warming of land surfaces. Gentle or moderate wind is known as the breeze while strong and gusty wind is known as the storm, when accompanied by thunder and lightning and small gusts of wind moving at high speed are known as gusts.

So, the correct option is B.

Learn more about Winds, here:

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What role does the brain play when it comes to our senses?

Answers

Senses refer to the ability to see,taste,touch, smell, and hear. Our senses receptors send signals to the brain. The brain analyzed the sensory information and tells the body what to do in response.

Which of the following factors most likely triggers arousal from hibernation?

A) the sun rising in the morning B)snow falling onto the ground
C) the environmental temperature dropping below 0 °C
D) a significant decrease in the animal's respiration rate

Answers

Answer:

A) the sun rising in the morning

Explanation:

In biology, hibernation refers to a physiological state where a plant or animal is metabolically inactive in the winter period (characterized by extreme cold). As far as the animal or plant is concerned, the cold weather during winter is an adverse condition, hence, they undergo hibernation in order to conserve their energy.

According to this question, arousal or wakening from hibernation would be triggered in the presence of heat source, which in this case is the SUN RISING IN THE MORNING.

Can you see individual cell without a microscope?

Please help me

Answers

No you can’t because the object has to be at least 0.1 Millimeters long to be visible

What type of variation is nessary for natural selection to occur

Answers

Answer:

Genetic variation

Explanation:

Genetic variability (diversity) stems from two basic processes: mutation and recombination.

If there were no mutations, all genes would exist in only one form, they would not have alternative forms.

Since phenotypic variability also depends on genetic variability, it is clear that the processes of mutation and recombination contribute to the creation of a large number of different phenotypes.

In Leonardo da Vinci’s time, nobody knew that the arteries were joined to the veins by tiny, invisible capillaries. This means that even though he studied the heart in detail, he thought that the arteries and veins were dead ends. Why did this make it difficult for him to understand how the heart worked?

Answers

Answer:

It was difficult for him to understand how the heart worked because he wasn't fully aware of the pumping mechanism of the heart and how the circulation of blood goes inside the body. Not seeing the capillaries meant that the heart pumped blood towards the vessels and into a dead end. He couldn't understand where the blood that was being pumped goes to.

Explanation:

Leonardo da Vinci is considered one of the earliest persons to study the heart. Although he made an exceptional observation of the different parts of the heart, he couldn't track the capillaries. He didn't know that these tiny structures connected the arteries and the veins. He believed that the heart was meant to transfer heat from the liver going to the muscles. He also believed that the lungs helped cool the blood.

What is the most common type of organic molecule?

protein

lipid

carbohydrate

carbon

Answers

Answer:

I am not certain but I think carbohydrate

Answer:

carbohydrate

Explanation:

carbohydrate is the most common type of organic molecule

The unit states that any animal that can be domesticated probably already has been. Explain the logic behind the statement and whether or not you find it convincing.

Answers

Answer:

Saying that if an animal can be domesticated that it probably already has been is saying that a lot of things are documented and if it has the capability to be domesticated or brought under human control then someone somewhere probably has. So I would personally find this convincing.

Explanation:

Hope that this helps and if so please mark me the brainliest. Peace and Love

Answer????????????????

Answers

Answer:

carbon dioxide

Explanation:

Which statement is true about meiosis?
It helps an organism grow in size.
It replaces dead or damaged cells.
It produces four genetically identical gametes.
It is a source of variation in sexually reproducing organisms.

Answers

Answer:

It is a source of variation in sexually reproducing organisms.

Explanation:

Answer:

D.It is a source of variation in sexually reproducing organism

Explanation:

The lesson question for this lab is “What is the effect of the type of food available on the frequency of different types of bird beaks?” The the lab procedure you just studied should help you address this question. Will it? Explain.

Answers

Answer:

Yes, this lab will address the lesson question.  

The procedure shows two different food situations—three foods and two foods.

However, the initial populations of birds are the same.

Therefore, in the end, you can compare generation three for each food situation and measure the effect of the food change.

Item 3
Which organ is found in the excretory system?


stomach


heart


bladder


large intestine

Answers

Answer:

Large intestine

Explanation:

Excretory Organs include- skin, liver, large intstine, lungs, and kidneys

Hope this helps

Answer:

skin, liver, large intestine, lungs, and kidneye

Explanation:

Google

which of the following best describes temperature?

Answers

Answer:

Motion

Explanation:

The kinetic energy produced from the motion of molecules is called temperature.

Answer: b) Motion of molecules

question 1. The construction of the Temple took seven years.
False True? question 2
Solomon sinned by allowing the corruption of God's people in the worship of idols.

True
False

Answers

1.) True .... 1 Kings 9:10 says it took Solomon 20 years altogether to build the Temple and his royal palace; the Temple itself was completed in 7 years

2.) True .... God hated it he would never have allowed it ....

Answer:

Question 1 true

question 2 true

Explanation:

Which of the following shows some, but not all, characteristics of life?

Answers

Where do we hypothesize that plants came from?

Which phrase best describes the function of the cell membrane?
O sends chemical signals
O allows things to move in + out of the cell
O rigid structure + support
o creates proteins
HELP

Answers

Answer:

i dont knowExplanation:

How might global climate change effect iguana populations?

Answers

Answer:

Since iguanas are cold blooded animals and can not regulate their own body temperatures, once temperatures reach 40° they become immobilized and they cant move, so if it is cold they will die.

An embryo forms inside a fertilized female egg of invertebrates. true or false.

Answers

Answer: If fertilization of the egg occurs within the female body, the fertilized egg is then laid outside the female body. If the fertilization took place outside the body, the fertilized egg remains outside the female's body. Now an embryo begins to form within the fertilized egg.

Explanation:

Answer: If fertilization of the egg occurs within the female body, the fertilized egg is then laid outside the female body. If the fertilization took place outside the body, the fertilized egg remains outside the female's body. Now an embryo begins to form within the fertilized egg.

Explanation:

Which best describes why all plants need some sort of leaf or other green, leaf-like surface?

to perform photosynthesis
to stand upright
to be eukaryotic
to transport food

Answers

Answer:

A) to perform photosynthesis

Answer:

A

Explanation:

onsider a scenario where a native plant population is growing at it's carrying capacity in a community. The seed of an invasive species is brought in by a squirrel, which then germinates, grows and reproduces resulting in the establishment a population of this invasive plant species. The invasive species has very similar niche as the native plant species. How do you predict the invasive plant population to be affected by the presence of this native species

Answers

The given question is incomplete, the complete question is:

Consider a scenario where a native plant population is growing at it's carrying capacity in a community. The seed of an invasive species is brought in by a squirrel, which then germinates, grows and reproduces resulting in the establishment a population of this invasive plant species. The invasive species has very similar niche as the native plant species. How do you predict the native plant population to be affected by the presence of this invasive species?

The invasive species fitness will be limited by the native plant species

The native plant carrying capacity will go down, relative to that prior to the invasive species arrival

There will be no change to the native plant population

The invasive species will grow unchecked and exponentially

No listed answer is correct

Answer:

The correct statement is the fourth one, that is, the invasive species will grow exponentially and unchecked.

Explanation:

The fitness of the invasive species will not get restricted by the native species. Though the opposite takes place as the original niche of the local species does not possess the natural predator for the invasive species. Therefore, invasive species emerge fitter and reproduce exponentially without population control.

The carrying capacity of the native species will not go down before the arrival of the invasive species, however, will go down post its arrival.  

As the invasive species has no natural predators, one can witness a substantial reduction in the population of the local plant population. The invasive species will utilize the niche of the local plant, therefore, resulting in the reduction of the native species population, as they have share habitat, food resources, and other natural resources.  

It is correct that the invasive species will grow without any control. An outbreak of invasive species generally takes place due to the absence of its natural predators in the ecosystem at the time of its introduction. Hence, the correct statement is the fourth one.

Invasive species establish in a new area, overgrow, and negatively interact with native species. The correct option is  4). The invasive species will grow unchecked and exponentially

-----------------------------------

Let us firts reviw some framework.

When talking about dispersion, we refer to the change in a species' range or distribution area.

When species move and establish in a new area, out of their original distribution range, they might be considered exotic or invasive, according to their

reproductive rate,

population growth, and

interaction with native species.

The introduction of invasive species has ecological, economic, socio-cultural consequences.

Once an invasive species has been established, it overgrows.

In the new areas, these species have less environmental pressure and better conditions than in their origin area -fewer predators, more resources, better nitches-.

These factors favor their establishment because they are adapted to surviving under harder conditions.  

They interact with native species by competing for resources such -water, place, radiation, exposure, shelter, food, etcetera-.  

They can also become significant predators of native species, consuming a wide diversity of prey items, and in many cases, there are no native species that may prey on them.

They provoke significant damages in the structure of native ecosystems, causing severe damage in endemic species.

They produce ecological imbalances in the trophic chains and the dynamics of communities. Invasive species are uncontrollable.

As they expand, they can also affect human in an economic manner and has socio-cultural effects. Many invasive species might cause crops loss by eating cultures. They attack farm animals. They affect buildings and other structures or ships by eating wood. They might even attack humans and cause health problems.

According to this information, we can answer the question.

We need to predict how NATIVE species are affected by INVASIVE species.

The options are,

1) The invasive species fitness will be limited by the native plant species

When talking about invasive species, this is not an option. Invasive species always affect the fitness of native species. So this option is not correct.  

2) The native plant carrying capacity will go down, relative to that prior to the invasive species arrival

The carrying capacity will still be the same. But resources availability will decrease faster because both species have the same requirements. They compete for the same resources. This option is not correct.

3) There will be no change to the native plant population

The will occur changes for the native population for sure. It will be affected by the presence of invasive species. So this option is not correct.  

4) The invasive species will grow unchecked and exponentially

Invasive species population will express an uncontrol exponential growth during its establishment phase.

This plant species find the perfect conditions to reproduce and increase its population size.

It finds available space, no predators, water and nutrients availability, proper light exposure, among others.

They can successfully compete with native species, displacing them and getting more space.  

THIS IS THE CORRECT OPTION

5) No listed answer is correct

Not correct

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A plasmid that encodes resistance to ampicillin and tetracycline is digested with the restriction enzyme PstI, which cuts the plasmid at a single site in the ampicillin-resistance gene. The DNA is then annealed with a PstI digest of human DNA, ligated, and used to transform E. coli cells. (a) What antibiotic would you put in an agar plate to ensure that the cells of a bacterial colony contain the plasmid

Answers

Answer:

tetracycline

Explanation:

When the DNA insert is ligated in Pstl site, the ampicillin gene is disrupted while tetracycline gene is still intact.

- If the bacterial colony is growth in a medium with only ampicillin, only the cells that contains the plasmid with the insert will grow.

- If the bacterial colony is growth in a medium with only tetracycline, the cells which have incorporated the plasmid will survive. We cannot distinguish between cells with plasmid + insert and plasmid alone.

- If the bacterial colony is growth in a plate with ampicillin + tetracyclin, only the cells with the plasmid without the insert will grow.

Therefore, to ensure that the cells of a bacterial colony contains the plasmid, they have to be seeded in a plate with tetracycline.

Why do people, animals, and all other organisms do cellular respiration?
O To make food/glucose for themselves. As a byproduct they make the oxygen that we need.
O To make carbon dioxide and water that animals can use.
O To make ATP (cell energy). Carbon dioxide and water are also produce as byproducts.
To make oxygen, carbon dioxide, and glucose for themselves.

Answers

Answer:

C

Explanation:

To make ATP(adenosine triphosphate), cell energy. Carbon dioxide and water are also a byproducts

Antimycin A Antimycin A is used in catfish farming: added to the water at 10 ppb, it kills small fish but does not harm catfish. Thus, small fish die out, and catfish get all the resources. When Antimycin A is added to isolated mitochondria, NADH and succinate both accumulate. However, if ascorbate, an artificial redox mediator that transfers electrons to cytochrome c, is added, oxygen consumption is still observed. Which step in the respiratory chain is antimycin A likely to inhibit (1 pt)

Answers

Answer:

Inhibits electron transport chain in mitochondria.

Explanation:

Antimycin A inhibits electron transport chain which leads to the complete halt of electron transport in mitochondria. due to this inhibition of electron transport chain in mitochondria leads to the killing of the fishes except catfish and so the catfish increase in population due to more resources and no competition. this Antimycin A is highly toxic for fishes and kill all fishes if used at the amount of 10 ppb.

In the image of the food chain below the ____ is the producer.

A. Fungi

B. Hawk

C. Plants

D. Snake

Answers

Answer:

A

Explanation:Producers, also known as autotrophs, make their own food. SO its A

a
fungi is the answer

Which habit would have the least variation in its salinity

Answers

Answer:

Mangrove forest

Explanation:

Mangrove forest exist only in high saline environment. Lake is a closed type body of water so it is expected with the least variation of salinity.

To grow, plant cells must produce new components of the cell membrane, including phospholipids and membrane proteins. Components of the cell membrane are most likely synthesized in which of the following cellular structures in a plant cell?

Answers

Answer:

endoplasmic reticulum

Explanation:

ER is full with proteins than help to synthesize phospholipids in plant cells

Which of the following is an essential amino acid?

Answers

Answer:

The 9 essential amino acids are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine.

Which object did New Horizons observe more closely than any other spacecraft in 2015?
-Mercury
-Venus
-Neptune
-Pluto

Answers

Answer is D pluto

Two days later, with about four months remaining before its close encounter, New Horizons finally became closer to Pluto than Earth is to the Sun. Pictures of Pluto began to reveal distinct features by April 29, 2015, with detail increasing week by week into the approach.

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how to find future value? What is another word for positive incentive?CouponCouponPenaltyPenaltyRewardRewardFreebie A researcher posed a null hypothesis that there was no significant difference between boys and girls on a standard memory test. He randomly sampled 40 girls and 40 boys in a community and gave them the standard memory test. The mean score for girls was 68 and the standard deviation of mean was 5.0. The mean score for boys was 66 and the standard deviation of mean was 5.0. What is the p-value and your conclusion at alpha -3x + 18 = 6x = ___show work please 30. The campaign to expel Muslims from Spain was called the(3 Points)Reconquista.InquisitionThird Crusade.Holy War. Plz help with these 2 questions and thx ! If the slope is -2 and the y-intercept is -5, then the linear equation is y = -2x - 5.TrueFalse What was made easier with the creation of photo-manipulation software? what is the missing number in the solution to 948 = 10 below What is the name of the type of rocker arm stud that does not require a valve adjustment? Glen mixes red bricks with yellow bricks when building sides of a brick house. The ratio is 3 pieces of red brick for every 7 pieces of yellow brick. If there are 28 pieces of yellow brick, how many pieces of red brick will there be? Find . Round to the nearest degree. Right Triangle Trigonometry. I WILL GIVE BRAINLIEST 50 POINTSWhat is the average rate of change for the mold over the 6 days? Walter tells his sister to be a __________________ or to get married and shut up Which expressions are equivalent to 6a(5+d) ?Select each correct answer.30a+6ad30ad30a+(6ad)(6a5)+(6ad)11a + d I live in Michigan. I went to Iowa and killed someone. I then went to Florida for vacation. I got caught for the Iowa murder while kicking back on the beach in Miami. Where will I be tried? ___________________ Where is this addressed? Why did Texas want to be their own state? Triangle UVW is formed by the three squares G, H, and I:A right triangle UVW is shown. On the side UV of this triangle is a square. Inside the square is written Square G, Area equal to 81 square units. On the side VW of this triangle is another square. Inside the square is written Square H, Area equal to 144 square units. On the side UW of this triangle is another square. Inside the square is written Square I, Area equal to 225 square units.Which statement best explains the relationship between the sides of triangle UVW? UV + VW = UW, because 81 + 144 = 225 (UV)2 + (VW)2 = (UW)2, because 152 + 92 = 122 (UV)2 + (VW)2 = (UW)2, because 81 + 144 = 225 UV + VW = UW, because 152 + 92 = 122 what is 0.000 002 in standard form Use the excerpt and your knowledge of social studies to answer the questions.We are now far into the fifth year, since a policy was initiated, with the avowed object, and confident promise, of putting an end to slavery agitation. Under the operation of that policy, that agitation has not only, not ceased, but has constantly augmented. In my opinion, it will not cease, until a crisis shall have been reached, and passed. A house divided against itself cannot stand. I believe this government cannot endure, permanently half slave and half free. I do not expect the Union to be dissolvedI do not expect the house to fallbut I do expect it will cease to be divided. It will become all one thing, or all the other.Abraham Lincoln, 1858To what did Abraham Lincoln refer when he said, A house divided against itself cannot stand?The Union would be dissolved over the issue of slavery.Slavery helped unite states in the Union.Compromise would continue to keep the issue of slavery at bay.The Union could not continue with both free states and slave states.