Which fossils provide information as to the mode of formation of an oxygen-rich atmosphere by about 2 billion years ago?

Answers

Answer 1

Answer:

The fossils that provide information on the formation of an oxygen-rich atmosphere are the stromatilites from the Precambrian era. These are layered and columnar fossils consisting mainly of cyanobacteria which were the original life form back then. These bacteria took in carbon dioxide and produced oxygen by photosynthesis as early as 2.5 billion years ago (the earth is about 4.5 billion yrs old).

Explanation:


Related Questions

Which is the overall purpose of the excretory system? extracting energy from food removing wastes from the body moving nutrients through the body gathering information

Answers

Answer:

removing wastes from the body

Explanation:

Excretory system is one of the organ systems in our body. The excretory system encompasses all the organs in the body associated with the function of REMOVING WASTES FROM THE BODY, which represents the primary function of the excretory system.

These organs in the excretory system which include; kidney, skin, lungs etc. all functions to remove one waste or the other. For example, the kidney removes URINE, the skin removes SWEAT, the lungs remove C02.

Answer:

removing wastes from the body

Explanation:

edge 2021

T/F Cell theory was developed before the invention of the microscope.
A. True
B. False

Answers

B false

The cell theory was developed in 1665 and the microscope in 1590


Which statement correctly distinguishes the functions of proteins from other types of biomolecules?

Answers

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, the four major biomolecules have the following different functions

1) Nucleic acid (as in DNA and RNA): They are a sequence of nucleotides that store organism's genetic code. This nucleotide sequence in turn determines an organism's protein sequence.

2) Carbohydrates: They are important structural components of various "compositions" in an organism (such as the cellulose in cell wall and ribose in nucleotide). They also serve as energy sources for the body.

3) Lipids: They also serve as energy sources and are part of membrane composition (as in the case of the phospholipid cell membrane).

4) Proteins: They are major structural elements of cells. They serve as enzymes in many biological activity (such as hexokinase in glycolysis and DNA polymerase in DNA replication). They also form hormones (such as insulin) and antibodies (such as the Immunoglobulins).

Which property of water allows it to moderate the temperature of nearby areas of land by resisting temperature changes? How is this important for living organisms?

Answers

Answer:

land because ask water

Explanation:

What is an example of behavioral isolation

Answers

Answer:

Behavioral isolation is demonstrated in species of finches. Their mating calls are distinct yet unique across species.

Explanation:

Mutations arising from errors within gene replication often accumulate within populations, becoming more stable. They may lead to the formation of separate, genetically distinct populations called species. These new species arise via:

allopatric speciationperipatric speciationparapatric speciationand sympatric speciation

Behavioral isolation is an isolating mechanism that is part of sympatric speciation. Here, there are apparent non-physical barriers to prevent mating, and several related species live within a population and gene-flow.  However, reproductive isolation occurs through assortative mating (mate choice based on shared traits) which may lead to heteropatric speciation.

Commonly observed in birds, it involves distinct and unique courtship and mating signals. Mates only respond to those fitting the required behavioral patterns such as a courtship dance, nest building, foraging and songs.

Where are the tornado watches and warnings released from?


A) National Weather Service Norman Oklahoma

B) National Hurricane Center, Miami, FL

C) National Weather Service Miami Florida

D) National hurricane center Norman Oklahoma

Answers

The tornado watches and warnings released from national Weather Service Norman Oklahoma.

What is National Weather Service Norman Oklahoma?

National Weather Service - Norman, Oklahoma is a Weather Forecast Office of the National Weather Service based in Norman, Oklahoma.

Moreover, it is responsible for forecasts and the dissemination of weather warnings and advisories for central and most of western Oklahoma, and western portions of north Texas.

Therefore, national Weather Service - Norman, Oklahoma (office identification code: OUN) is a Weather Forecast Office (WFO) of the National Weather Service based in Norman, Oklahoma, which is responsible for forecasts and the dissemination of weather warnings and advisories for central and most of western Oklahoma.

Learn more about National Weather Service Norman Oklahoma:

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Answer:

A) National Weather Service Norman Oklahoma

Explanation:

I used to live there, plus why would a hurricane service go over that. And tornadoes don't originate in Florida.

Which molecule is a high energy output of photosynthesis

Answers

I think it’s ATP I searched it

Explain how fermentation is useful in the preservation of food products.

Answers

Answer: mold is used to make cheese.

Explanation:

mold is used to make dairy products such as yogurt and cheese.

Fermentation preserves many foods, including meats, fruits and vegetables. It also destroys natural toxins in food, and it is keeping the product safe for us to eat for a longer period of time.

Hope this was helpful.

PLZZZZZZZZZZZZZZZZZZZZZZZ HELP ME THIS DUE TODAY!!!
PUT IT IN YOUR OWN WORDS!!!!


1. What is the name of Saturn's moon that we are studying? *


2. What is the name of the NASA space probe that was sent to study Saturn and its moons? *

OWN WORDSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS

Answers

Answer:

We are studying the moon, Titan.

NASA sent the space probe, Cassini, to study Saturn and it's moons.

Explanation:

Callie did a lab during which she investigated the difference in cellular respiration rates between two different types of corn: germinating and non-germinating. A germinating seed is one from which a plant has started to grow. A non-germinating seed is usually dry and a new plant has not yet emerged. The data that she gathered are displayed in the graph. After Callie obtained her original results, she wanted to dig deeper. She determined that the germinating corn seed had utilized 100 molecules of glucose in the first few seconds that she performed the experiment. If these data are accurate, how many carbon dioxide molecules would Callie expect to have been released as a waste during this same amount of time? Explain how you arrived at your answer. The formula for cellular respiration is shown below. C6H12O6 + 6O2 → 6CO2 + 6H2O + energy

This a written question and please keep it at 7th grade level

Answers

Answer:

I might be wrong but im guessing 600

Explanation:

Since there is one molecule of glucose used per 6 molecules of carbon dioxide released, if you have 100 molecules of glucose, then you multiply the carbon dioxide by 100 which is 600. Thats what I would say but I might be wrong.

What are the 3 elements that cause seasons?

Answers

1 earth axis 2 sunlight 3 elevation

Due in 1 minute please help

Answers

Answer

hhhhhhbbhnjhhhhbbbbbhhhh

Phagocytosis is an example of ?

Answers

white blood cells such as neutrophils, monocytes, macrophages, mast cells, and dendritic cells

tRNA molecules bring a specific ________________ to the ribosome, according to the ______________. *
2 points
protein, mRNA anti-codon
protein, tRNA codon
amino acid, tRNA anti-codon
amino acid, mRNA codon

Answers

Answer:

tRNA molecules bring a specific amino acid to the ribosome, according to the mRNA codon.

Explanation:

In the context of protein synthesis, an mRNA molecule contains the specific codons that encode the amino acids that will be part of the protein. The tRNA is in charge of bringing the amino acids to the ribosome, according to the specific information of the mRNA codons.

The function of tRNA depends on the complementarity that exists between the mRNA codon and the anti-codon tRNA, in such a way that :

The pattern in the amino acid sequence of a protein is indicated by mRNA tRNA has a complementary anticodon, so it will only bring the specific amino acid that the codon encodes.

In general terms, each mRNA molecule possesses the genetic code that indicates the amino acid sequence of a protein, and tRNA helps bring those amino acids to the ribosome for synthesis to occur.

The process of desalination removes salt from seawater using condensation methods or filtration. Which of the following is least likely to be a problem for widespread use of desalination?
A. To be economical, desalination plants must be build on coastlines
B. Desalination uses large amounts of energy
C. There is a shortage of seawater to use for desalination
D. Desalination is relatively slow

Answers


There is a shortage of seawater to use for desalination.what's the answer

The memory of facts and experiences that people consciously know and can easily recite is known as
memory

Answers

Answer:

also known as EXPLICIT memory, are long term memories relating to specific facts and events that can be verbally stated. ... Memory of facts and experiences that one can consciously know and "declare", Information or knowledge that can be consciously recollected; also called declarative memory.

Explanation:

Hard question help me please :I

Answers

Answer:

B

Explanation:

I think it's B because the telophase stage of mitosis is when the cell splits into two identical cells.

Answer:

B

Explanation:

     

Economy Question:
Which situation best illustrates globalization's effect on an economy?
A. An Italian fashion company has its clothes made in Taiwan.
B. A Swedish computer company develops a popular new laptop.
C. An Israeli baker sells cakes to local families for many special occasions.
D. A Kenyan construction worker builds a skyscraper in his home city.

Answers

Answer:

A. An Italian fashion company has its clothes made in Taiwan

Explanation:

Globalization is when a company starts having influence in other countries. This is bet seen in A. The fashion company is able to sell it's clothes all over the world. But, it's based in Italy. That is already globalization. But, on top of that, to have it made in Taiwan if even more foreign influence.

The situation best illustrates globalization's effect on an economy is An Italian fashion company has its clothes made in Taiwan. The correct option is A.

What is globalization?

Globalization means when the economy or trade is happening and connects with the world. The trade that makes the world interconnected, then it is called globalization.

An Italian company when established its fashion company in Taiwan, creates a relationship between these two countries, and increases globalization.

All other options show trading or manufacturing in the local markets, within the states or countries, doesn't match with the term globalization.

Thus, the correct option is A. An Italian fashion company has its clothes made in Taiwan.

Learn more about globalization, here:

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In the human body, sodium—a component of salt—balances fluids, such as water, in the body. Explain how the onion experiment showed this. 20 BRAINLY POINTS PLZ HELP

Answers

Answer:

The salt worked like sodium on the onion.

Explanation:

What do inner planets and outer planets have in common, and what are some differences?

Answers

Answer:

Inner Planets include Mercury, Venus, Earth and Mars,- these are hotter planets.

Outer planets are colder because they are farther from the sun, a lot farther.  

Explanation:

They are all planets.

Helppppp I have one hour until it’s due!!!!

Answers

1. Overpopulation
2. Ecosystem
3. Hunger & Sustainability

Which list of countries arranged least to most in terms of how much of their income they spent on food
1China Canada Poland Kenya
2Poland China Kenya Canada
3 Canada Kenya Poland China
4 Canada Poland China Kenya

Answers

Answer:

is number three

Explanation:

Why is the Earth, moon, and all of the other planets layered?

Answers

Planetary scientists are pretty sure that Mercury, Venus and Mars also have these layers. ... Not just planets have a core, mantle and crust. Several moons in our solar system have them! The Moon has a core and mantle similar to Earths but the crust is basaltic rock.

Hope it helps you

Answer:

Planets have different layers because different materials have different densities.

Explanation:

Density comes into play on how heavy matter is at a certain size. The planets formed as dust, gas, asteroids and comets collided together.Around the metal cores, the planets have a mantle and crust made of rock

Please help !!!!!!
I need some to calculate this for me.

Pro Tip 1: To calculate the % of cells at rest (in interphase), divide the number of cells in interphase by the total # of cells in the slide (cells in telophase may look like they are almost 2 cells, but you can still count them as 1).
# of cells in interphase ÷ total cells = % of cells at rest

Pro Tip 2: To calculate the % of cells dividing (or mitotic index), add up the cells in prophase, metaphase, anaphase and telophase. Divide that number by the total # of cells in the slide.
# of cells in PMAT ÷ total cells = % of cells dividing (or mitotic index)

Answers

Answer:

INTERPHASE PROPHASE METAPHASE ANAPHASE TELOPHASE % of Cells at Rest (interphase)

% of Cells Dividing (Mitotic Index)

Normal Lung

13 cells 2 cells 2 cells 2 cells 1 cell 65% 35%

Cancerous Lung  6 cells 5 cells 3 cells  3 cells 3 cells 30% 70%

Normal Stomach  10 cells  3 cells  3 cells  3 cells   1 cell 50% 50%

Cancerous Stomach  5 cells 5 cells  4 cells  4 cells  2 cells  25% 75%

Normal Ovary  9 cells  5 cells  3 cells  1 cell 2 cells 45% 55%

Cancerous Ovary 3 cells  6 cells 5 cells 3 cells 3 cells  15% 85%

Explanation:

The answers are also down below in the chart if that helps you better make sense of them.

There are 20 cells in each column, to find the ones at rest we simply take the first number in the column and devide it by the number of cells (in this case 20) once we find the percent of cells at rest, we subtract from 100 to see the cells deviding!

Hope this helps another student along the way! :)

Good luck with your studies and have a fantastic winter break!

A cold front often brings intense weather changes such as thunderstorms while a warm front often brings light rain or drizzle. Why is this the case?

Answers

Answer:

The front term is associated with an area where two air masses met and as it is usually the condition with heavy rain, fierce wind, snow and other violent weather like a war situation. The front could be warm, cold, occluded or stationary depends on the type of weather.

The cold front is associated with lots of thunderstorms and other intense weather while the warm front changes with drizzly rain and warmer weather due to the fact that in a cold front, replacement of warm air by the cold air is faster while in a warm front, the replacement of cold air by warm air is gradual

10. Explain the difference between Biological & Cultural Carrying Capacity.

Answers

Answer:

I do not know

Explanation:

Answer: Biological carrying capacity describes which species are able to coexist in a niche. Cultural carrying capacity describes the ability of a human population to thrive and create culture in meager circumstances.

Explanation:

Please help it’s urgent!!!!

Answers

Answer:

The first answer

Explanation: “add Energy from the form of heat to get a change in the state of matter”

Which process creates two daughter cells with identical genetic material?

A. interphase


B. intercellular communication


C. mitosis


D. meiosis

Answers

Answer:

c

Explanation:

who cares

As shown in the diagram above, at several locations warm, less dense water cools

Answers

What exactly are you trying to ask ??
I don’t see a diagram

How does the structure of bone allow it to function with the immune system? (PLEASE HELP QUICK THEYRE COMING)

Answers

Answer:

In addition to providing a structural support for the body and a reservoir for calcium, bone encases the bone marrow, a primary site for hematopoiesis and immune system development.

Explanation:

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Jimmy earns money for babysitting his littlebrother. He earns the same amount everyweek. He is saving all the money he earns for asummer trip. The table shows how Jimmy'ssavings have been growing. Hugh wrote the properties of physical and chemical weathering in the table shown.Types of WeatheringPhysical WeatheringChemical WeatheringTemperature may break the rocks Can be caused by chemicals in waterCan be caused by snow and pressure Composition of rock remains sameWhy is Hugh's table incorrect? (5 points)aChemicals in water cause physical weathering.bTemperature is unable to break rocks physically.Chemical weathering changes the composition of rocks.Physical weathering is unaffected by snow and pressure.Od Calculate the pH during the titration of 20.00 mL of 0.1000 M trimethylamine, (CH3)3N(aq), with 0.2000 M HClO4(aq) after 9.48 mL of the acid have been added. Three cubic feet of seawater weigh 192 pounds.What is the weight of the seawater in an aquarium that is 4.4 ft long, 2.5 ft wide, and 5.3 ft high? Third-grade teacher Ms. Lena has implemented a system of offering Reading Rug time to students who line up at the door properly and promptly when asked. To her dismay, she notes that those students who have in the past always lined up without incident now dawdle and chat until plied with Reading Rug points. Ms. Lena is witnessing: Self-efficacy Growth needs Overjustification effect Maslow's Hierarchy Jasmine bought 6.4 pounds of chewy candy from the local confectionary store. If she gave 2.06 pounds of the candy to her little brother Sam, how many pounds did Jasmine have left for herself? A. 3.8 pounds B. 4.34 pounds C. 3.98 pounds D. 4.3 pounds Please help me solve this problem how does the cytoskeleton help maintain cell shape? Please help this is due soon!!! Janelle wants to learn to play the piano. Her friends recommended two different music schools. Make Music charges $525 for 10 hours of lessons. Piano Play offers 12 hours of lessons for $540. Which school offers the better deal? In ionic bonding, atoms__.A. share electronsB. are connected by strong electrical forcesC. lose protons and form ionsD. stop moving completely Gretta wants to buy a jar of fossils that is 10% off. The original price is$47.82.What is amount of discount (nearest penny)? mumbai is 845 km away from bangalore whats that distance in cm The details in the "Immigrant Aid Workers" section of "The Workers of Ellis Island" support the central idea that these aidesA.had several titlesB.were part of numerous organizations.C.supported the well-being of immigrants.D.worked for many years. What usual ingredient is in blue cheese?MoldCalciumProbioticsFood coloring Can some smart person help me out here!!!!!!! Can someone help with this problem? ASAP The vertices of a triangle are P(2, 3), Q(4, 2), and R(4, 8). What are the vertices of the image reflected across the y-axis?P(2, 3), Q(4, 2), and R(4, -8)P(2, 3), Q(4, 2), and R(-4, 8)P(2, 3), Q(4, 2), and R(4, 8)P(-3, -2), Q(-2, -4), and R(8, 4) When does acceleration due to gravity equal 9.8 m/s downward?Select one:a. alwaysb. when an object has been dropped downwardc. when an object has been thrown upwardd. at the peak of a thrown object's flight What language did Grover speak?FrenchGermanLatinAncient Greek