Earlier in history, the earth's atmosphere was most likely not friendly to organisms that needed oxygen to breathe. Today, however, the earth's atmosphere contains the oxygen needed for eukaryotic organisms. The oxygen was produced by cyanobacteria through the process of _____.

volcanism
photosynthesis
metabolism
respiration

Answers

Answer 1

Answer:

Photosynthesis

Explanation:

Photosynthesis- Processes That Produce Oxygen


Related Questions

why is religion important

Answers

Answer:

All religions are a foundation for morals and beliefs; it helps shape us and determine what we see as right and wrong. ... But, if we are the generation that teaches the next one that religion is wrong, religion itself will die out. We would lose beauty, lose stories, lose something so valuable to everyone–faith.

Explanation:

how does the fact that the Bahamas are coral islands affect the areas economy

Answers

Answer:

The Bahamas are coral islands, therefore, they are surrounded by rich coral reefs. These coral reefs are popular tourist attractions. This fact makes the Bahamas a premier tourist destination and this booming tourist industry brings about economic development.

Test 11.3.2 Question 8 of 10
What causes the southern hemisphere to experience summer?
A. Earth's south pole is tilted toward the sun.
B. Earth's axis and it's equator are at different angels.
C. Earth's axis and it's orbit plane are at different angels.
D. Earth's north pole is tilted towards the sun.

Answers

Actually it’s a


When the northern hemisphere is tilted toward the sun latitudes between the equator and 90n (the North Pole) are experiencing summer. At the same time, the Southern Hemisphere is tilted away from the sub and experiencing winter

Answer:

A. Earth's south pole is tilted toward the sun.

Explanation:

I got the test

why does an asteroid not get put into orbit around a planet

Answers

Answer:

It's complex, but it is related to the velocity of the asteroid, the orbital velocity of the planet, the gravitational pull of both, and the asteroids angle of attack.

what are some characteristics of global population

Answers

Answer:

Population Size and Density

Population dispersion or spatial distribution

Age structure

Explanation:

once did a project on this

Calculate the mean annual temperature change using the data in the chart .

Answers

Answer:

Mean annual temperature change ≈ 11°C (to nearest degree)

Explanation:

The mean annual temperature change = sum of temperature change of the 12 months ÷ 12

= (-5 + 2 + 6 + 10 + 15 + 22 + 24 + 21 + 17 + 12 + 6 + (-3)) ÷ 12

= 127 ÷ 12

Mean annual temperature change ≈ 11°C (to nearest degree)

what are some things that are affecting the wildlife?

Answers

Answer:

Some of the biggest threats to wildlife include illegal wildlife trade, habitat destruction, invasive species, pollution, and clime change. Illegal Wildlife Trade: The illegal wildlife trade is the fourth largest criminal industry in the world, after drugs, arms, and human trafficking

Explanation:

Another examaple is:

Pollution. Every day the byproducts of our daily lives make their way via the air and water into the natural environment and become pollutants.

what is the status of women in the Persian golf such as UAE and Saudi Arabia?

Answers

Answer:

In 2018, 39% of the global workforce were women, but in MENA, women’s share was just 20.3%, and in the GCC it is even less.

Explanation:

what does life expenses measure ?

A. the average income a population likely earns during employment
B. the average human development during a populations lifetime
C.The Average number of years that a population is likely to live
D.The average standard of living during a populations lifetime

Answers

Answer:

just too the test its b

Explanation:

after ww1 which nations/states lost territory as new nations were created?

Answers

Answer:

The empire of Austria-Hungary was lost and new nations were created from it Austria, Hungary, Czechoslovakia, and Yugoslavia.

Explanation:

Which of the following terms identifies the type of regions shown in the
dark gray-shaded areas on the map?"
Geography

Answers

Answer:

E. Semiautonomous regions

Explanation:

College board

Semiautonomous regions terms identify the type of regions shown in the dark gray-shaded areas on the map. Thus the correct option is E.

What is Map?

A map is referred to as a pictorial representation of different places used to identify the direction and reach the exact location. They help teh user to identify sea, rail routes, and roads to reach the destination.

Semiautonomous areas are those that are largely self-governing while yet being a component of a larger political or administrative entity. Only democracy can be found; there is no dictatorship.

These maps are becoming advanced nowadays and become digital in one click which people to reach their destination timely without causing any delay.

Therefore, option E is Semiautonomous regions appropriate.

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The missing option of the questions are

Functional regions

Urban regions

Physical regions

Vernacular regions

Semiautonomous regions

How has the Mid-Atlantic Ridge helped geologists better understand plate tectonics and what is taking place inside the Earth? Answer in at least three complete sentences.

Answers

Answer:

Mantle convection drives plate tectonics. Hot material rises at mid-ocean ridges and sinks at deep sea trenches, which keeps the plates moving along the Earth's surface. ... The outer limbs of the convection cells plunge down into the deeper mantle, dragging oceanic crust as well. This takes place at the deep sea trenches.

Explanation:

PLEASE HELP ME: Explain what the State of Nature is in your own words

Answers

Answer:

It is the exploratory life of people before societies really came to life...

Explanation:

Becuz my cat told me so...=!

What is the median of 7,1,8,4,2,6,5

Answers

Answer:

4.71

Explanation:

1. add all of the numbers up.

7+1+8+4+2+6+5

= 33

2. divide by the number of numbers

33 ÷ 7

= 4.714

Please help!!

Plate Tectonics:Question 9
Fill in the missing term from this sentence:
Extreme heat from the Earth's core causes ___________
currents
in the mantle, causing the tectonic plates located above the mantle to
move.
Select one:

induction

subduction

magnetic

convection

Answers

Answer:

Convection

Explanation:

What are the two different ways that Earth moves?

Circles and Orbits

Spins and Rotates

Orbits (Revolves) and Rotates

Rotates and Tilts

Answers

The earth Orbits and Rotates.

According to the passage, the people of Portugal and Sierra Leone had which geographical relationship?

Answers

Answer:

a divided one

Explanation:

People with a tolerance to alcohol can drink without __________ in the early stages of impairment.

Answers

Answer: appearing impaired

Explanation:

Anyone weakened by beer should let another sober person drive

What comprises the lithosphere?

Answers

Answer:

soil, rocks, landforms, and other surface features.

Explanation:

hope this helps

which of the following best describes the status of women in Persian golf country such as UAE and Saudi Arabia?

Answers

I think b , by the way I’m from UAE

Natural resources writing prompt: what is a natural resource, how do we classify them, how are they used and how do we care for them?

Answers

A natural resource is a resource that exists without any actions of humankind. This includes all valued characteristics such as commercial and industrial use, aesthetic value, scientific interest and cultural value. On Earth, it includes sunlight, atmosphere, water, land along with all vegetation, and animal life.To provide care for natural resources we can plant more trees, save electricity, go paperless or use less paper, quit smoking. There’s many ways to care for natural resources.

pls helpppp it’s not a

Answers

Answer:

B

Explanation:

Answer:

It's B I know it is I wish you good luck

? does someone know tbis one

Answers

Answer:

i think a but im not sure about it

a is the answer i guess

examine the impacts of the monsoons in India ​

Answers

Over half of India's population works in agriculture, and monsoon rains directly affect their incomes and livelihood. Agriculture adds up to more than 15% of India's Gross Domestic Product (GDP), which means that when crops fail because of too little rain, the economy suffers.
Mark brainliest if correct ;)

can someone help me w this

Answers

Answer:

Option D , within a plate

Explanation:

Which of the following is an explanation for the similar impact of large-scale commercial agriculture in developed countries and plantation agriculture in developing countries?
A. Both farming practices stimulate local economies with the influx of profits from export-oriented crops.


B. Both farming practices involve the consolidation of family farms and displacement of rural communities.


C. Both farming practices provide an increased standard of living in rural communities from the many jobs created to run these large farms.


D. Both farming practices enable local farmers to remain on their land rather than migrating to jobs in urban areas.



E. Both farming practices guarantee that long-term sustainable farming methods will be incorporated in their production processes.

Answers

Answer: B

Explanation:

Both farming practices involve the consolidation of family farms and displacement of rural communities is an explanation for the similar impact of large-scale commercial agriculture in developed countries and plantation agriculture in developing countries. Thus option B is correct.


What is agriculture?

The art or science of developing the soil, growing vegetables, and raising livestock is known as agriculture. It involves preparing plant and animal items for human consumption and distributing them to marketplaces. The vast majority of bread and textiles in the world are produced by agriculture.

The parallel effects of big commercial agribusiness in industrialised nations and plantation agribusiness in developing economies can be explained by the fact that both agricultural systems include the merger of farms and ranches and the eviction of rural areas.  Therefore, option B is the correct option.

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do humans, turtles, horses, birds, bats, and seals share a common ancestor?

Answers

Answer:

yes

Explanation:

they have similar vertebrates

Answer:

Not really

Explanation:

Its not really proven or known at this time but some evidence suggests fossil sloths may be this ancestor

Question 8 of 15 The of a region is the long-term weather of that region. A. climate B. value C. culture D. rain​

Answers

Answer: Climte

Explanation:

Climate is the description of the long-term pattern of weather in a particular area.

Wind patterns

Choose ALL that apply

lesson 2.09

Question 7 options:

The sun's energy heats air at the equator more than it does at the poles.


As a result, air near the equator heats up and rises because it is less dense.


As it rises, it cools and begins to flow toward the poles. As this air leaves the equator, cooler and heavier air from the poles flows along the surface to take its place.


Radiant energy from the sun strikes Earth unevenly.

Answers

Answer:

The answer is all of them.

Explanation:

I took the test and it is all of them.

In the Pacific, the seafloor on one side the youngest crust gets very old, but the seafloor on the
other side is much younger. What do you think is happening that might create that kind of age
pattern?

Answers

Answer:

Subluxation. One plate slides under another.

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