Science Question

Do you think iron oxides found within rocks likely appeared before or after the emergence of cyanobacteria? and explain why

Answers

Answer 1

Answer:

Iron oxides appeared after the emergence of cyanobacteria.

Explanation:

The composition of Earth's atmosphere in the first couple of billions of years of its existence was nothing like the atmosphere of today. This had a big influence on the processes that were taking place, or rather what processes and to what extent could have happened in those conditions. One big difference between the atmosphere then and after is the levels of oxygen.

Until the appearance of cyanobacteria, the oxygen levels in Earth's atmosphere were very low, and the same goes for the oceans. With a lack of oxygen, the process of oxidation was absent as well. The cyanobacteria though managed to produce oxygen, and this was on such a high scale that they changed the composition of Earth's atmosphere and the oceans. Not just that this enabled complex lifeforms to develop, but it also enabled the process of oxidation. Iron oxides for example occurred only after cyanobacteria appeared, and this can easily be seen when dating the oldest iron oxides and compare that age with the appearance of cyanobacteria.


Related Questions

Aborigines threw __________ into the air to wound or kill birds and bats during hunts.
A.
boomerangs
B.
suffrage
C.
Pakeha
D.
ta moko

Answers

Answer:

A . boomerangs the answer

Answer:

A

Explanation:

I took the quiz

[tex]cot(x)=\sqrt{3}[/tex]

Answers

Answer:

The answer is "[tex]30^{\circ}[/tex]"

Explanation:

[tex]\to \cot x= \sqrt{3}\\\\\to \cot x= \cot {30}^{\circ}\\\\\to x= {30}^{\circ}\\\\[/tex]

WILL AWARD BRAINLIEST PLEASE HELP IMPORTANT HELP IS NEEDED PLEASE PLEASE QUICK!!! Describe how a government might manipulate a map to tell a particular story.

Answers

Answer:

A goverment that is authoritarian in some way might change a map to the side of themselves. For example, Kashmir and Jaipur are being fought over by India, Pakistan, and China without actually fighting. In thier own countries, the goverment will change the maps to show that they have conquered these areas to show the public. Or when China manipulates its maps from time to time to show only in its population how some famous mountains are controlled by China or how before conquering Tibet, China already showed its maps to be controlling Tibet at the begining of its communist rule to gain the support of the people.

True or False: The city of Istanbul is divided by the Bosporus Strait

Answers

Answer:

true

Explanation:

One part of Istanbul lies in Europe and the other part lies in Asia. Istanbul's European part is separated from its Asian part by the Bosphorus strait

The ratio of a to b is 3 to 4, and the ratio of c to b is 1 to 2. What is the ratio of a to c?

Answers

Answer:

3:2

Explanation:

From the given problem;

     a : b  = 3 : 4

      c : b  = 1 : 2

So what is the ratio of a:c

              a : b : c  = ?

 Since

               a : b           b : c

                3 : 4          2 : 1

If we multiply b : c by 2 ;

         b : c  = 4 : 2

So;

                a : b           b : c

                3 : 4           4 : 2

  So;

                  a : b : c

                  3 : 4 : 2

So;

            a : c  = 3:2

The Arabian plate is moving in a northeasterly direction. How does this explain the geography

Answers

Answer:

mountains in the northwestern region are a result of the plates colliding

What are the options for the question

In this excerpt, the author is making which of the following claims?
1.
Imperialism is necessary for industrial growth.
2.
Native rulers are benefiting from colonial control.
3
White rulers live at the expense of the natives.
4
The term "lower races is an factual description.

Answers

Answer:

4

Explanation:

Pls help
What happens to global winds at the Equator?

Answers

Warm air rises at the equator and moves toward the poles. Global winds do not move directly from north to south or south to north because the Earth rotates.

Where would you most likely find a swamp
A. In the Mountains
B. On high plains
C. In a coastal lowland
D. On a cape

Answers

Answer:

c. in a coastal lowland

Explanation:

shrek live in a swamp

there are two contients

Answers

Answer:

Actually there are 7

Explanation:

Answer:

There are 7 conitnents in the world today

Explanation:

Find the fraction :
[tex] a)\frac{5}{6} of \: 180 \: m[/tex]
[tex] b)\frac{2}{8} of \: 112[/tex]

Answers

To Find :

Two fractions :

[tex]a) \dfrac{5}{6} \ of\ 180\ m[/tex]

[tex]b) \dfrac{2}{8}\ of \ 112[/tex]

Solution :

We need to multiply given fractions with the numbers.

a)

[tex]=\dfrac{5}{6}\times 180\\\\=150 \ m[/tex]

b)

[tex]=\dfrac{2}{8}\times 112\\\\= 28[/tex]

Therefore, the answer of given problems are a) 150 m and b) 28 .

Question 7(Multiple Choice Worth 2 points) A map of the world with different colored boundary lines around each of the following alliances: NATO, AU, ASEAN. NATO is labeled I, the AU is labeled II, and ASEAN is labeled III. Public Domain Which of the following numbers indicate a regional alliance? I only II only III only I and II II and III

Answers

Answer:

2 and 3

Explanation:

ASEAN is The Association of Southeast Asian Nations is a regional intergovernmental organization comprising ten countries in Southeast Asia.

NATO is  The North Atlantic Treaty Organization, also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 European and North American countries.

Answer:

II and III

Explanation:

NATO is a military alliance and has countries from North America and Europe so it isnt regional

What two ideas began to spread among the English speaking middle class of India in the late 1800’s

Answers

Answer: Individual rights & self-government

Explanation:

Which statement best describes the causes of deforestation?​

Answers

Answer:

Deforestation causes soil to lose vegetation, allowing heavy rains to wash away the topsoil and to cause flooding by clogging up rivers

Explanation:

Which One Don’t Lie

Answers

Answer:

a. transparent

b. reflection

c. refraction

a is transparent
b is reflection
c is refraction

Explain brahmaputra river system​

Answers

Answer: The Brahmaputra river flows in China, Bangladesh, and in India.

Explanation:

The river Brahmaputra originates from Tibet and it flows east side in Himalayas. It then takes a U turn and finally enters into the Arunachal Pradesh. When the Himalayan snow melts it causes extensive flooding. Upper course of river is known as Tsangpo. In Arunachal Pradesh this river is called Dihang or Sihang river. The river is used for inland navigation instead for irrigation for agricultural purposes.

Thicker but less dense than the oceanic crust; located in crust layer of the earth this is known as _______.

Answers

Answer:

magma

Explanation:

What is the best way for Zareen to make the group more effective?

by coming prepared
by staying focused
by listening better
by asking questions

Answers

Answer:

By staying focused

Explanation:

Answer:

(B) by Asking question

Urban Sprawl increases carbon dioxide emissions by
1 - expanding the use of public transportation
2 - increasing the need to drive
3 - generating more factories

Answers

Answer:


Explanation: 1 - expanding the use of public transportation

Urban Sprawl increases carbon dioxide emissions primarily through increasing the need to drive. Therefore, option (2) is correct.

Urban sprawl occurs when cities expand into suburban or rural areas, resulting in low-density development, longer commutes, and more car use. Vehicle use raises [tex]CO_{2}[/tex] emissions.

As cities expand, distances between homes, businesses, and other destinations grow, making public transit less efficient. This increases private vehicle use for commuting and transportation. Private automobiles emit carbon dioxide by using fossil fuels like petrol.

Learn more about Urban Sprawl, here:

https://brainly.com/question/30636543

#SPJ

Early Colonial cities like Charleston, Savannah, and Augusta are build in a ?
pattern.

Answers

Answer:

protective?

Explanation: i dont know what your answers could be but i would say whichever one has something to do with protecting the cities that have been used as an example because they were all built to protect. hopefully this is helpful and works for your answers!

Define the term remote sensing, and explain whether GPS and GIS are considered examples of remote sensing, and why. (Think about ways in which satellite imagery can be used to track changes on Earth's surface.)​

Answers

Explanation:

Remote sensing is the process of gathering information about the earth without actually coming into contact with the features on ground. Remotely sensed data are obtained by means of orbiting satellites that are moving round the earth.

Geographic information systems is a broad category that describes the process of gathering, storing, analyzing and presenting geographical data. A remote sensing unit and GPS device are components of the GIS framework. Also, there is a software where the data gathered by a GPS and remote sensing units are interpreted for use. So, GPS and remote sensing are subunits of GIS.

Dividing a number by 2 always results in a smaller number.

A.
The number is 8.
B.
The number is 5.
C.
The number is 2.
D.
The number is 1.
E.
The number is -1.

Answers

Dividing a number by 2 always results in a smaller number.

A.

The number is 8.

(4)

B.

The number is 5.

(2.5)

C.

The number is 2.

(1)

D.

The number is 1.

(.5)

E.

The number is -1.

(-.5)

Justin’s house lies on the San Andreas Fault in California, and he wants to protect his family against earthquakes. What is one step Justin can take?


a.
Educate himself on ground deformation that occurs before earthquakes.

b.
Check his home’s foundation to ensure it is resistant to shaking caused by moving tectonic plates.

c.
Buy a seismograph that can predict earthquakes before they occur.

d.
Be prepared to evacuate if steam or ash cloud eruptions are visible.

Thank you!

Answers

answer:a is the answer

Classify the hypotheses about fluids on Earth as falsifiable or non-falsifiable.

Floating in the Great Salt Lake in Utah is a lot of fun.

The Great Salt Lake is salty due to a high rate of water evaporation in the desert climate.

Magma erupting from the mantle below Earth's surface is hot and fluid in nature.

Magma leaks up from the mantle below Earth's surface and spreads out, forming a new ocean floor, thereby causing land forms above to move.​

Answers

Answer:

Falsifiable: Magma leaks up from the mantle below Earth's surface and spreads out, forming a new ocean floor, thereby causing land forms above to move;

 

Falsifiable: The Great Salt Lake is salty due to a high rate of water evaporation in the desert climate;

Falsifiable: Magma erupting from the mantle below Earth's surface is hot and fluid in nature;

Non-Falsifiable: Floating in the Great Salt Lake in Utah is a lot of fun;

The ultimate goal of Confucianism is to teach a person how to become __________.

A.
an aggressive ruler
B.
a moral person
C.
a thoughtless leader
D.
a passive person

Answers

Answer:

B . a moral person

Explanation:

The ultimate goal of Confucianism is to teach a person how to become a moral person.

B.
Confucianism taught people how to be a moral person

Which of the following best represents a convergent boundary where an oceanic plate and a continental plate meet?

A The San Andreas Fault.

B. The "Ring of Fire" around the Pacific Ocean.

C. The Himalaya Mountains between India and China.

D. The mid oceanic ridge in the middle of the Atlantic Ocean.

Answers

Answer:

B. The "Ring of Fire" around the Pacific Ocean.

Explanation:

The "Ring of Fire" around the Pacific Ocean is the best example of a convergent boundary where an oceanic plate and continental plate meets.

At such margins, subduction is the order of the day. Due to the differences in the density of the plates involved, the oceanic plates goes beneath the continental plate. The pacific sea floor is ocean crust and it is denser. As it slides beneath the continental crust, subduction zones are created. This circular geometry of the subduction zone is known as the pacific ring of fire.

The stem growing upright is an example of:
A) Positive Photosynthesis
B) Negative Photosynthesis
C) Positive Geotropism
D) Negative Geotropism

Answers

Answer:

D) Negative Geotropism

Explanation:

The stem growing upright is a typical example of negative geotropism.

Geotropism is the growth of a part of plant towards the pull of gravity.

Gravity always pulls down on every object. When a body grows downward, then it is responding to a positive geotropism.When a body begins to grow upward, again gravity, then it is negative geotropism.

In this case, the negative geotropism is exhibited by some plant roots.

Also, some tree branches can also grow downward and this shows positive geotropism

The way plant grows is due to some factors that influence its growth. The stem growing upright is an example of negative geotropism

Geotropism is known to be when a plant show forth directional growth due to its response to gravity.

The shoot tip often shows negative geotropism when it grows against the force of gravity.

The negative geotropism is simply known also as the ability of plant stems and other parts to grow upwards.

Conclusively, it is regarded as negative geotropism only due to the fact that the plant is growing away from the force of gravity.

Learn more from

https://brainly.com/question/19226131

6. Shintoism believes that the spirits of an individual's ancestors are always
present in the air. *
T or F

Answers

Answer:

True

Explanation:

Due to the tilt of the Earth, the northern hemisphere gets more sun light in July

a. true

b. false​

Answers

Answer:

False.

Explanation:

Is in June.

Hope it is helpful, if I'm wrong I'm so sorry.

Answer: True

I'm pretty sure

Hope it helped u,

pls mark as the brainliest

^_^

what characteristics do Quebec and Canada and new Orleans lousiana have in common​

Answers

french influence, cajuns and creoles, their similarities are based on culture
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