Please help me with answer

Please Help Me With Answer

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Answer 1

Answer:The Great Oxygenation Event, which occurred around 2.45 billion years ago, was probably the first major extinction event. Since the Cambrian explosion, five further major mass extinctions have significantly exceeded the background extinction rate.

Explanation:

got this from the internet very helpful :)


Related Questions

HELP
From the point of view of your immune system, what is the most likely consequence of picking your nose?

It can cause damage to the lining of your nose, which your immune system will then have to repair.
It removes the helper T cells stored in your nasal mucus, making your body less likely to produce a nonspecific immune response to pathogens.
It pushes any pathogens on your finger up into your nose and removes mucus that was there to trap them.
It can leave dirt inside your nose, which your immune system must remove by creating specific antibodies.

Answers

Answer:

It can leave dirt inside your nose, which your immune system must remove by creating specific antibodies.

Explanation:

because ur nose hair prevents dirt and things from getting in, but when you pick ur nose ur putting stuff directly in ur nose

please help ASAP will give brainiest !!!!!!!!

an energy pyramid is a diagram that shows energy gain. true or false?

Answers

Answer:

True

i hope this helps

false, an energy pyramid shows the flow of energy from one topic, or feeding, level to the next in an ecosystem.

What kind of an animal is a zebra

Answers

Answer:

Explanation:

im pretty sure it is a Equine family from a mamel i hope thats the answer!

Hope it helps

- Delilah

PLEASE ANSWER ASAP!
Considering the theory of continental drift, is it possible that the continents of the earth could once again become one? Explain your answer.

Answers

Answer: The Earth's continents are in constant motion. On at least three occasions, they have all collided to form one giant continent. If history is a guide, the current continents will coalesce once again to form another supercontinent. And a study in Nature now shows how that could come about.

You can think of continents as giant puzzle pieces shuffling around the Earth. When they drift apart, mighty oceans form. When they come together, oceans disappear. And it's all because continents sit on moving plates of the Earth's crust.

Then, Now And Future

A new model of continental drift predicts that the next supercontinent could form near the North Pole — in another 100 million years or so.

Two of the previous supercontinents, which formed 200 million years ago (Pangaea) and 800 million years ago (Rodinia).

Mitchell, et. al./Nature

The Americas and Asia may fuse together to form a new supercontinent, "Amasia."

Mitchell, et. al./Nature

"Continents on these plates typically move, I would say, at the rate your fingernails grow," says Ross Mitchell, a graduate student at Yale University. That may seem slow, but it adds up over hundreds of millions of years.

Look at an atlas and you can imagine how Africa and South America, for example, once nestled together.

"Rewind the tape and bring all the continents back into their jigsaw arrangement, you have this vast landmass of all the Earth's continental blocks together," Mitchell says.

Last time all the landmass clumped up, it formed a supercontinent called Pangaea. The dinosaurs walked there. But Pangaea wasn't the first.

"There had been three, possibly a debated fourth supercontinent through the billions of years," Mitchell says.

He has been studying that deep history by looking at tiny magnets buried in rock around the world. Those magnets pointed north when they were locked into the rock. Sample those magnets in layers of rock laid down over millions of years, and you can tell the story of how those continents have moved.

And naturally, that led Mitchell to wonder what the next supercontinent will look like.

There have been two leading ideas. One is that the continents will collapse together again at the site of the last supercontinent, centered on Africa. That would squeeze the Atlantic Ocean shut. The other idea is that the Atlantic would keep growing and growing.

Considering the theory of continental drift, is it possible that the continents of the earth could once again become one.

The Earth's continents are constant motion, they will collide to form a giant continent and the current continents will coalesce once again to form another supercontinent.

What Is Continental Drift Theory?

Continental drift theory was the revolutionary theory developed by Alfred Wegener (1880-1930), a German meteorologist, climatologist, and geophysicist.

He put forwarded his hypothesis that the continents included in a large enormous landmass or supercontinent about 240 million years ago before breaking and drifting.

This supercontinent was named as Pangaea.

Some major drawbacks of this theory are he did not explain why the drift happened during Mesozoic era, but not in earlier era.

He did not take oceans  into account for his hypothesis, proofs are based on generalized assumption, so it is not significant.  

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Elizabeth is digging a hole and discovers a trilobite. She continues digging deeper and finds another trilobite.
Which of the following is an accurate conclusion?
The second trilobite is older than the first trilobite.
The first trilobite is older than the second trilobite.
The first trilobite is smaller than the second trilobite.
The second trilobite is smaller than the second trilobite.

Answers

I believe the answer is 1., because the older trilobite would be found deeper in the ground.

A scientist agrees with the scientific consensus that dinosaurs have scaly skin. Then he discovers a new fossil that indicates a dinosaur had feathers. The scientist refuses to consider the new evidence because it does not agree with the accepted ideas. The scientist is
being biased by the scientific consensus.
practicing skepticism by ignoring evidence.
being open-minded by finding new fossils.
drawing conclusions supported by evidence.

Answers

Answer:

This is a pretty easy question. the answer is A: The scientist is

being biased by the scientific consensus.

Explanation:

The scientist ignores the new evidence because of the old consensus that is being biased

Answer: Answer is A

Explanation:

Which moon phases are present in this model?

a. New Moon and Full Moon
b. 1st Quarter and 3rd Quarter
c. Waning Cresent and Waxing Cresent
d. Waning Gibbous and Waxing Gibbous

Answers

C waning crescent and waxing crescent

Use the drop-down menus to indicate where each endocrine system structure is located.

The thyroid, parathyroid, and thymus are located in the A.brain B.throat C.abdomen.

The adrenals, pancreas, testes, and ovaries are located in the A.brain B.throat C.abdomen.

The pineal, hypothalamus, and pituitary are located in the A.brain B.throat C.abdomen.


Answers

Answer:

1:B
2:C
3:A

Explanation:
I’ve taken biology in the 8th grade. :)

Question 7 If two molecules of DNA formed during replication are different, what has happened?

1. perfect replication

2. transcription

3. translation

4. mutation

With explanation pls
Pls right answer NO GUESSING

Answers

Is 1 or 4 idk just try yb

Answer:

2 transcription

Explanation:

i learn this last unit test

ps. go to you tube and like for goldendeathrider

A nucleotide has 6 carbon sugars. True or false

Answers

It’s has 5 I’m bc I looked it up

The given statement "A nucleotide has 6 carbon sugars" is a false statement as nucleotides have pentose or 5- carbon ribose sugar in their composition.

A nucleotide is a compound that is connected to other nucleotides together to form structures of nucleic acids that are RNA and DNA. These compounds have three components linked together to form it, that are:

Nitrogenous basephosphate grouppentose sugar or 5-carbon sugars

In DNA these pentose sugars are called deoxyribose and in RNA these pentose sugars are called ribose due to the presence of the -OH group on the 2' carbon of the ribose in RNA.

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For both conditions, explain how protein synthesis contributes to the symptoms of the disease

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Answer:

Explanation:

Among the causes of protein synthesis disorders, an important place is occupied by various types of alimentary insufficiency (complete or incomplete starvation, lack of essential amino acids in food, violation of a certain quantitative ratio between essential amino acids entering the body).

The protein synthesis correspondingly contributes to the symptoms of the disease by the fact that it produces some dysfunctional or bizarre proteins which significantly stimulate the specific types of disorder in organisms.

What is Protein synthesis?

Protein synthesis may be defined as a biological process through which cells make protein in order to perform specific functions within the body of living organisms. It occurs in two stages, i.e. transcription and translation.

Transcription is the stage of protein synthesis through which the effective transfer of genetic instructions in DNA to mRNA in the nucleus takes place. While the process of translation involves the process by which a cell makes proteins using the genetic information carried in messenger RNA (mRNA). It occurs in the cytoplasm of the cell.

The disorder of protein synthesis is occupied by numerous kinds of alimentary insufficiency such as entire or incomplete starvation, insufficiency of mandatory amino acids in food, and violation of essential amino acids entering the body.

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What percent will be black?


50 %


100 %


25 %

Answers

Answer: 50 % will be black.

Explanation:

The answer is 50% because there are 4 boxes and two of them have the dominant trait of being black and the other 50% will be spotted/

Select all that apply.
Cyanobacteria
serve as a food source for other organisms
are used for medicinal purposes
produce oxygen
perform nitrogen fixation
cause disease

Answers

Answer:

Its A . serve as a food source for other organisms .

Explanation:

hope it helps

Answer:

Yes . the correct one is serve as a food source for other organisms.

Explanation:

hope ut helps you

What substance in the mouth contains an enzyme that begins chemical digestion?

mucus

saliva

fiber

pepsin

Answers

Answer:

B) saliva

Explanation:

Saliva contains an enzyme (amylase) that begins the breakdown of carbohydrates.

Cosmologists are scientists who study stars, galaxies, black holes, and other objects in the universe. In order to study the billions and billions of stars, cosmologists use highly advanced telescopes and create computer models to trace the stars’ motion.

What is one type of limitation that requires cosmologists to use these telescopes?

money
time
the size of the system
ethical concerns

Answers

Answer:

ethical concerns

Explanation:

Some processes that shape Earth are shown below.

Answers

Answer:

3: Glacial Movement

Explanation:

Why is it important for scientific information to be accurate?

Answers

Answer:

See below

Explanation:

It is important to be both reliable and precise when taking scientific measurements. Precision indicates how similar a metric is to its true meaning. This is necessary because incorrect hardware, bad data analysis or human error will yield inaccurate and false performance.

Hope this helps.

When taking scientific measurements, it is important to be both accurate and precise. Accuracy represents how close a measurement comes to its true value. This is important because bad equipment, poor data processing or human error can lead to inaccurate results that are not very close to the truth.

Skin colour in humans is determined by more than one gene pair, whereas Rh factor in blood is controlled by one gene pair. Which would show more variability in the human population? Why?

Answers

Answer:

Well...

Explanation:First of all skin color is determined by how much melanin you have and the one thing that would show more variability in the human population is probably the one that uses less genes, because of how we come from only two genes which makes us different.

Why is the phloem in a leaf important to the roots of a plant?
A. It transports oxygen to the roots of the plant.
O B. It transports blastocysts to the roots of the plant.
O C. It transports water from the roots to the leaves.
OD. It transports carbohydrates to the roots.

Answers

Answer:

D. It transports carbohydrates to the roots.

Explanation:

Phloem is mainly used to transport nutrients from their region of production to the region that needs or stores the nutrient.

In photosynthesis, the method that plants make food, starch is produced. As the root hair cells needed energy to function, nutrients is needed so that it can respire and produce energy.

Therefore, when starch is produced, they will travel down the plants by the phloem to the roots where the nutrients is used.

brainlest please

As it delivers carbohydrates to the roots, the phloem in a leaf is vital to a plant's roots. So, the correct option is D.

What is Phloem?

The plant tissue known as phloem is in charge of moving sugars, nutrients, and other organic substances from the leaves, where they are made by photosynthesis, to the other sections of the plant, such as the roots, flowers, and fruits.

Phloem has a bidirectional transport system that enables it to carry materials both across and down the plant. Sieve-tube elements and companion cells, which make up phloem tissue, are specialised cells.

A vascular tissue called phloem is in charge of moving sugars (carbohydrates) from the leaves to the roots and other sections of the plant. The plant may transfer the byproducts of photosynthesis through its whole system thanks to a process called as translocation.

Therefore, the correct option is D.

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During photosynthesis, plants take in carbon dioxide, water, and energy from
the sun and produce carbohydrates and oxygen. Which of the following
statements best explains how plants follow the law of conservation of mass
during photosynthesis?

Answers

Answer:

a

Explanation:

-Why do some land types absorb water better than others?

Answers

Answer:

I'm sure this is due to the porosity of the land type.

Explanation:

You see some land types are more porous than others; meaning, there are plenty air pockets in that land type. Hence, allowing water to pass through easily as compared to those with lesser air pockets.

Give an example of reciprocal behavior from everyday life?

Answers

Exchanging gifts with someone can we reciprocal behavior

EASY BRAINLIEST
In the classification of organisms by kingdom, all prokaryotes are grouped together in the kingdom Monera. Genetic research, however, led to the separation of prokaryotes into two domains, Archaea and Eubacteria. Which of the following best describes similarities between Archaea and Eubacteria?

Both can undergo binary fission and are autotrophs.
Both are able to withstand extreme temperatures and lack of oxygen.
Both have single-stranded, helical DNA and cell walls.
Both lack membrane-bound organelles and are single-celled.
DONT TAKE ANSWERS OFF OF ONLINE

Answers

Answer:

D) Both lack membrane-bound organelles and are single-celled.

Explanation:

The answer is D because the main difference between Archaea and Eubacteria is they differ in the formation of their cell wall. Archaea's cell walls are made of  uncommon lipids while Eubacteria have cell walls made of peptidoglycan.

Which statement about global warming is true?
A)
Global warming affects terrestrial ecosystems only because aquatic ecosystems are not affected by the Earth's surface temperature.
B)
All species can adjust to changes brought about by global warming through changing feeding and breeding patterns.
C)
Global warming concerns result from increase in the Earth's surface temperature and the increase in the carbon dioxide concentrations in the atmosphere.
D)
All of the above

Answers

Answer:

The answer is C

Explanation:

None of the others make sense

Global warming concerns result from increase in the Earth's surface temperature and the increase in the carbon dioxide concentrations in the atmosphere. So, the correct answer is (C).

What is Global Warming?

Global warming occurs when Carbon dioxide ([tex]CO_2[/tex]) and other air pollutants collect in the atmosphere. It is the long-term heating of Earth’s surface.

Due to Global warming, glaciers are melting, sea levels are rising, cloud forests are dying, and wildlife is scrambling to keep pace.

The causes of Global warming are so many like

1.Generating power

2.Manufacturing goods

3.Cutting down forests

4.Using transportation

Thus, Global warming concerns result from increase in the Earth's surface temperature and the increase in the carbon dioxide concentrations in the atmosphere. So, the correct answer is (C).

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When put together, these bases (A,T,C,G) make up "sentences" that we call

Answers

Answer:

Explanation:

ATCG are called the Nitrogenous Base. The DNA(deoxyribonucleic acid) is made up of a phosphate group, 5 Carbon sugar called deoxyribose and Nitrogenous base.

This Nitrogenous bases are further divided into purine and pyrimidine

Purine includes- Adenine and Guanine while pyrimidine includes Thymine and Cytosine or Uracil in the RNA.

When Base pair occurs, Adenine pairs with Thymine while Guanine pairs up with cytosine in DNA.

how could large molecules cross the cell mebrane

Answers

Answer:

When molecules are too large or too charged to cross the plasma membrane by diffusion or osmosis, there are other methods to accomplish their transport into or out of the cell. For example, some proteins in the plasma membrane are known as protein channels and they form a way for large or charged molecules to pass through the membrane.

Explanation:

Answer:

through carrier or channel proteins

Explanation:

How can DNA become damaged? Explain your answer

Answers

Answer:

DNA can be damaged via environmental factors as well. Environmental agents such as UV light, ionizing radiation, and genotoxic chemicals. Replication forks can be stalled due to damaged DNA and double strand breaks are also a form of DNA damage.

Answer:

DNA can be damaged via environmental factors as well. Environmental agents such as UV light, ionizing radiation, and genotoxic chemicals. Replication forks can be stalled due to damaged DNA and double strand breaks are also a form of DNA damage.

Explanation:

*
Which of these are mammals? (3)
Dog
Clownfish
Snake
Frog
Human
Dolphin

Answers

Answer:

Dog, Human, Dolphin

Explanation:

All of these animals produce milk, live birth, and have hair. These qualities make them mammals

Question 2 (1 point)
Select the organelles that are found only in plant cells.
mitochondrion
chloroplasts
cell wall
cell membrane
small vacuoles
large vacuoles
golgi body
lysosome
endoplasmic reticulum
blue Cheetos
pink bubblegum​

Answers

I’m sorry no blue Cheetos or pink bubblegum is stored in a plant cell

What is an organism that lives on or in another organism and derives its nutrition from that organism?

Answers

Answer:

A parasite

Explanation:

Parasitism is a form of symbiosis where one organism lives on/in another organism, as in the question, and gets a benefit from that organism, while the other organism is harmed. This is denoted by +/-, which means that one is positively impacted and one is negatively impacted, as opposed to commensalism, which is +/0, or mutualism, which is +/+.

An example is tapeworms, which are flatworm parasites that live in the human  intestine; they benefit while the host suffers.

Other Questions
In the game of economics, every person alive plays the role of which of thefollowing? Why is it difficult to convince top management to commit funds to develop and implement a Strategic Information System What is distance between point X and point Y?StartRoot 11 EndRootStartRoot 22 EndRootStartRoot 61 EndRootStartRoot 72 EndRoot slope???????????????? A sales man earns 6% commission on all the merchandise that he sells last month he sold $7000 worth of merchandise how much commission and daughters did he earn last month b(1)=2 b(n)=b(n1)7 Find the 3 rd 3 rd 3, start superscript, start text, r, d, end text, end superscript term in the sequence. ABCD is a quadrilateral with vertices at (-2,3), (-1,7), (3,9), and (2,5). Is it a rectangle Solve for x: 1 < x + 3 < 5 2 < x < 8 4 < x < 2 2 > x > 8 4 > x > 2 NameDateSHARE THE TREASURE 3Captain Salamander and his crew have found 24 bars of gold.The captain decides that he is going to share all the treasure out.He puts 1/3 of the bars to aside for himself.He gives 1/4of the bars to his friend BillHe shares out 7 bars with the rest of his crew.How many bars does he have left?Z/ 17. Innovative Consulting Co. has the following accounts in its ledger: Cash, Accounts Receivable, Supplies, Office Equipment, Accounts Payable, Common Stock, Retained Earnings, Dividends, Fees Earned, Rent Expense, Advertising Expense, Utilities Expense, Miscellaneous Expense. Journalize the following selected transactions for October 20Y2 in a two-column journal. Journal entry explanations may be omitted. Oct. 1 Paid rent for the month, $2,500. 4 Paid advertising expense, $600. 5 Paid cash for supplies, $1,200. 6 Purchased office equipment on account, $9,200. 12 Received cash from customers on account, $15,900. 20 Paid creditor on account, $3,410. 27 Paid cash for miscellaneous expenses, $550. 30 Paid telephone bill for the month, $400. 31 Fees earned and billed to customers for the month, $50,170. 31 Paid electricity bill for the month, $830. 31 Paid dividends, $1,850. Conclusion for I have a dream speech 416Math - Week 5 continued:Monday:Clark is wondering how his grade is in math class. His last 6 test scores are shown below. Find themean, median, mode, and range of his test scores.879882769593Range -Mean =noneMedianMode =Accelerated students: Answer the above and make a line plot of the data. A recipe for lemonade requires 10 parts of water to every 6 parts of lemon juice. How many cups ofwater should be added to 30 cups of lemon juiceto make the lemonade? In the hydrolysis of ethyl ethanoate, what will happen when the reaction is catalysed by an alkali? jena walks 6 miles. karla walks 3 times as far as jena. which expression shows how many miles karla walks? Which of these two expressions represent the phrase "five plus two times a number"? A. 5n+2n and 2n+5n B. 5+2n and 2+5n C. 2n+5 and 2n-5 D. 5+2n and 2n+5 use PQR to answer the question What glacial consequences could there be in the future? on what characteristic of an organism does natural selection exert pressure? a. allele frequency b. gene poolc. genotype d. phenotype The experimental probability of spinning a 3 is what?am I correct?