Answer:
Cyanobacteria started producing pure oxtgen
A. After the Hadean eon
Explanation:
Cyanobacteria, otherwise called Cyanophyta, are a phylum of microscopic organisms and plastids that acquire their vitality through photosynthesis. They are the main photosynthetic prokaryotes ready to deliver oxygen.
The name cyanobacteria originates from the shade of the microorganisms. Cyanobacteria started producing pure oxygen after the Hadean eon.
Cyanobacteria started producing pure oxygen during the Proterozoic eon, making option B the correct answer. This significant development, known as the Great Oxygenation Event, occurred approximately 2.4 billion years ago and resulted in the oxygenation of Earth's atmosphere, paving the way for the evolution of aerobic organisms. Therefore, option D is correct.
The Proterozoic eon is a geological eon that lasted from about 2.5 billion to 541 million years ago. It is a significant period in Earth's history when complex life forms began to emerge.
During the Proterozoic eon, various important events took place, such as the evolution of multicellular organisms, the development of oxygen-producing cyanobacteria, and the formation of the supercontinent Rodinia.
It laid the foundation for the subsequent Phanerozoic eon, which is characterized by the proliferation of diverse life forms and the emergence of complex ecosystems.
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What are all of the dwarf planets
Answer:
they are 5 officially recognized dwarf planets in our solar system they are Ceres, Pluto, Haumea, Makemake and Eris. With the exception of Ceres, which is located in the asteroid belt, the other dwarf planets are found in the outer solar system. There are another 6 objects in our solar system that are almost certainly dwarf planets and there may as many as 10,000. Of the dwarf planets only 2 have been visited by space probes, in 2015 NASA’s Dawn and New Horizons missions reached Ceres and Pluto respectively.
Explanation:
Which ocean zone lies inside v-shaped trenches
the hadal zone lies inside v-shaped trenches
Answer:
Hadal Zone! This is V- shaped and the deepest
Your answer is Hadal Zone
What is a reason why the uk population has gone up xoxo
Answer
The EU And Brexit (sorta)
Explanation:
Article 13 and other things here is some more reasons in this
Which natural process is responsible for ridge push? A. Mantle convection B. Subduction C. Seafloor spreading D. Reversal of Earth's magnetic field
Answer:
A. Mantle convection
Explanation:
Ridges are formed over the divergent plate boundaries, it can be pushed by the mantle plume volcanism originated by the core mantle boundary at the Asthenosphere region over the divergent plate boundary. Seafloor spreading is the one of the evidences of plate tectonics theory. Subduction of the plate is the result of ridge push and slab pull, oceanic plate is less dense so its under beneath the high denser continental plate.
Answer:
Seafloor spreading
A basic concept in economics is that all resources are?
scarce.
allocated.
valuable.
renewable.
A basic concept in economics is that all resources are scarce.
Answer: Option A
Explanation:
Economics is basically related to the study of resources which are scarce in relation where scarce means that they are not available in plenty and the quantity is less and have to be allocated properly so that they can be used properly.
Since these resources in the economy are not available in plenty, they have to be allocated in such a way that they are used in an efficient and a judicious way for the activities taking place in the economy.
Answer:
A basic concept in economics is that all resources are scarce (Option A)
Explanation:
Conventional economics scientists have a view that humans and society always have a desire to meet the needs, both those needs in the form of goods (services) and services (services). In order to meet these needs, a problem will emerge which will then be considered as the most fundamental problem, namely the limited means of meeting human needs provided by nature (Triono, 2014: 163).
Thus, the fundamental problem in the discussion of the discipline of economics is scarcity. In other words, if there is no scarcity, in the sense that all goods are as abundant as air, then economics will disappear as a point of thought of economists.
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Keywords
- Basic Concept
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what are some of the british cultural influences in australia?
Answer:
i found the answer on google
Explanation:
Britain remained the dominating cultural influence in Australia. Britons also dominated the make-up of Australian society - most of Australia's citizens were either born in Britain, or had British descendants.
Which of the following regions is labeled with the number 1 on the map above?
The region labeled with the number 1 on the map is the eastern mountains.
The map you sent me is a labeled map of the major physiographic regions of the United States. The eastern mountains are shown in the northeastern part of the map, and they are labeled with the number 1.
The other regions on the map are:
The western mountains, which are shown in the northwestern part of the map and are labeled with the number 2.
The Interior Plains, which are shown in the central part of the map and are labeled with the number 3.
The lowlands, which are shown in the southeastern part of the map and are labeled with the number 5.
So, the answer is A. the eastern mountains.
Complete Question:
Which of the following regions is labeled with the number 1 on the map above?
A. the eastern mountains
B. the western mountains
C. the Interior Plains
D. the lowlands
Which of the countries on the map above is Japan?
A.
number 1
B.
number 4
C.
number 5
D.
number 6
Answer:
its located here
Happy to help.
Pls mark as Brainliest
Answer:
D.
number 6
Explanation:
which continent of today were part of gondwanaland
Answer:India, Australia,south Africa,south America and Antarctica
Explanation:
Answer:Gondwanaland was a super continent that existed from about 550 million years ago until about 180 million years ago. The continents of South America, Africa, Antarctica, and Australia, and part of the Indian subcontinent along with Arabia( not a continent) all were part of Gondwanaland
Explanation:
During Sub-Saharan Africa's colonial period, what were the main causes of ethnic conflict? Choose all that apply.
A. democratic political groups
B. divide and rule policies
C. favoritism for ethnic groups
D. political borders
E. unite and conquer practices
D. Political borders
Answer:
Favoritism for the ethnic groups was the main reason for ethnic conflict during the Sub-Saharan Africa’s colonial period.
Explanation:
Favoritism is the act of providing preferential treatment to one group at the cost of another group. It shows partiality towards one section affecting the another for no reason. The cause here is due to the lack of political will in maintaining agreements of peace. They are the combinations of poverty and improper state management. A strong economic development policy and democratization will definitely help for the betterment of the nation.The magma most Skely to produce a non explosive eruption is
a) Magma A
b) Nagma B
c) Magma C
d) Magma D
Answer:
c) Magma C
Explanation:
The magma marked with C, is a felsic (rhyolitic) magma. This type of magma has high content of silica, making it highly viscous, and it also has high content of gases. The high content of gases comes from the high viscosity, as the gases are trapped inside the magma and can not get out of it. This results in eruptions of explosive or effusive type. When the magma rises, the temperature and pressure change, with results in explosion of the trapped gases in the highly viscous magma. Through this explosion, lot of pyroclastic material is shot out of the volcano in the surrounding area, making it very dangerous for everything in its surrounding area.
The Mariana Trench is an example of a A. paleo-coast. B. continental slope. C. deep ocean canyon. D. continental shelf.
Answer:
Option C. Deep ocean canyon
Explanation:
The Mariana Trench is an example of a deep ocean canyon
Deep ocean canyon is found in Mariana Trench.
Answer: Option C
Explanation:
The ''Mariana Trench'' can be found in the western ''Pacific Ocean'' which is nearly about 200 kilometers east of ''Marian Islands''. It is considered as the "deepest trench in the world". It is crescent-shaped canyon of about 2,550 km and an average width of 69 km.
It is true that mariana trench is an example of a deep ocean canyon and it is formed by the fusion of sub-merging of the Eurasian plate and the Philippine Plate. Not all trenches are as deep as Mariana Islands. The descend part of the Marian is called Challenger Deep and it covers most of the southern part of trench.
which phrases could you use to describe a place
The phrases you could use are a,c,d
are best phrases to describe a place.
What is a phrase?It is group of words which acts together and forms a grammatical units. particular forms of words which gets a meaningful sentence.Therefore, above phrases best describe a place.
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Read the passage below and answer the question that follows. Developing industrial societies are in this stage of demographic transition. During this stage, societies discover technology and resources encourage growth. Birthrates remain high, and improved living conditions and medical knowledge result in lower death rates. Which of Thompson’s stages of Demographic Transition is described in the paragraph above? A. 1 – Balance B. 2 – Growth C. 3 – Leveling D. 4 – Replacement
Answer:
i think 2 Growth to be honest
Explanation:
Thompson's stage of Demographic Transition that is described in this paragraph is Growth.
The reason that Thompson's stage of Demographic Transition that is described in this paragraph is Growth is as follows:
The demographic transition model was initially proposed in 1929 by demographer Warren Thompson.The model has four stages: pre-industrial, urbanizing/industrializing, mature industrial, and post-industrial.So, in this paragraph mature industrial is followed.Where Growth is describing the situation.Hence, the correct answer is option(2) Growth.
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Can someone help me with the last two questions?
1) darker - this is because dark surfaces absorb more heat so it would be hotter
2a) cloud cover (?) - leas cloud cover would mean less heat is trapped by clouds.. i think
2b)Lighter- light surfaces don’t absorb as much heat (reflect some)
what does the term scale mean
Answer:
See the picture below for all the definitions.
which lakes are located in West Africa?
A. Chad
B. Tanganyika
C. Victoria
D. Volta
I Know That "Lake Victoria" Is Located In West Africa
Answer: Lake Victoria and Lake Tanganyika
Explanation: Learned this when I was in the 5th grade.
If a country has a low GDP, it __________.
Answer:
If a country has a low GDP, it produces a low number of goods each year, resulting in an economically poor nation
Explanation:
Answer: D
Explanation:
Produces a low number of goods each year, resulting in an economically poor nation.
Which process or theory explains how life could have arisen from nonliving materials?
Answer:
Abiogenesis explains how life could have arisen from nonliving materials
Abiogenesis is the theory which explains how life could have arisen from nonliving materials.
What is Abiogenesis?
Abiogenesis, the idea that life can arise from nonlife more than 3.5 billion years ago on Earth. Abiogenesis proposes that the first life-forms generated were very simple and, through a gradual process, became increasingly complex.The study of abiogenesis aims to determine how pre-life chemical reactions gave rise to life under conditions strikingly different from those on Earth today. It primarily uses tools from biology and chemistry, with more recent approaches attempting the synthesis of many sciences.
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When polar ice melts, how does this exacerbate warming oceans?
Ice is reflective and when the sun hits the polar ice it's heat gets bounced back and doesn't significantly effect the water or earth. When the ice is melted there is less ice to reflect the sun away, and the water gets warmed, therefore warming the oceans.
Hope this helped! Let me know if I need to clarify anything or explain anything more in depth!
Which stars have the highest absolute brightness?
A) Supergiants
B) Giants
C) Yellow stars
D) Dwarfs
A supergiants is the answer
What time is it in gerogia
Answer: rigth now it is 10:03pm
Answer:10:16 PM est
Explanation:
In what ways has increased population growth affected the region?
decreased brain drain
increased competition for jobs
Increased membership in extremist groups
reduced biodiversity
reduced petroleum production
Final answer:
Increased population growth has had various effects on the region, including decreased brain drain, increased competition for jobs, increased membership in extremist groups, reduced biodiversity, and reduced petroleum production.
Explanation:
The increased population growth has affected the region in several ways:
Decreased brain drain: With a larger population, there is a higher likelihood of skilled individuals staying in the region rather than migrating elsewhere.
Increased competition for jobs: More people in the region means more competition for available job positions.
Increased membership in extremist groups: A larger population may lead to increased disillusionment and social unrest, resulting in the growth of extremist groups.
Reduced biodiversity: The pressure on natural resources, such as fresh water and wild animal populations, increases with population growth, leading to the loss of biodiversity.
Reduced petroleum production: As human population grows, there is an increased demand for petroleum, leading to its depletion over time.
Developed nations are able to provide healthcare services because of the development of __________.
Answer:
Developed nations are able to provide healthcare services because of the development of strong government infrastructure.
Answer: strong government infrastructure
Which of the following statements about the tail of a comet is correct?
A. The tail always points toward the sun.
B. The tail always points away from the sun.
C. The sun's corona creates the tail of a comet.
D. The tail always points behind the comet.
Answer is B
Explanation:
The force exerted on the coma by the Sun's radiation pressure and solar wind cause an enormous tail to form, which points away from the Sun.
The answer choice which is true about the tail of a comet is:
B. The tail always points away from the sun.Based on the given text, we can see that a comet is an outer worldly form which can be found outside the Earth's stratosphere.
With this in mind, we can see that the force which is exerted on the tail of the comet makes it to point away from the sun.
Therefore, the correct answer is option B
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Two types of global food webs show the feeding relationships of organisms. What distinguishes one type of global web from the other?
A whether the producers are located on land or in water
B whether or not the food web includes tertiary consumers
C whether the web includes animals that migrate during the year
D whether the ecosystem described by the web is localized or very broad
the correct answer is A
Answer:
We can distinguish one global web from the other by locating the producers either on land or on water.
Explanation:
"Food web" is an ecological concept where it represents feeding relationships inside communities. It is the collection of interconnected food chains where the food energy is transferred from one species to the other. The food webs can be used to unfold the various patterns of energy transfer in aquatic and terrestrial ecosystems. That is locating the producers either on land or on water.Which of the following climate regions has the widest temperature range?
A. Arctic
B. Subarctic
C. Marine west coast
D. Tropical
Arctic has the widest temperature range .
Answer: A
B the artic is only cold most of the time in sub artic they can get insane versions of all four seasons 110 in summer -50 in winter
During the weekend, Suzanne is working on her school project. She could have gone out with her friends or practiced her cello instead. She thinks that if she hadn’t worked on her project, she would have been out with her friends. What is the opportunity cost in this scenario? A. practicing the cello B. completing the project C. going out with friends D. going out with friends and practicing the cello
Answer: C going out with friends
Explanation:
Answer:
C. Going out with friends
Explanation:
That's the opportunity she missed. Instead, she studied.
which phrases could you use to describe a location?
Final answer:
To describe a location, one can use nominal or absolute terms, such as naming a city or using specific coordinates. Prepositional phrases help relate the location to nearby features. Maps visually support these descriptions.
Explanation:
There are various phrases you can use to describe a location. Physical locations can be described in nominal or absolute terms, where nominal refers to names like cities or geographic features, and absolute pertains to specific coordinates or addresses. For instance, you could describe a location by its cultural region or name it after a natural feature. Prepositional phrases can indicate relative spatial positions, such as 'next to the river' or 'behind the school', providing a description based on the surrounding environment. Maps and other geographic tools help in conveying the location through visual aids.
A state’s lieutenant governor
A state’s lieutenant governor. A lieutenant governor is a high officer of state, whose precise role and rank vary by jurisdiction, but is often the deputy or lieutenant to or ranking under a governor a "second-in-command".
An elected individual who serves as the state's second-highest executive officer is referred to as the lieutenant governor of a state.
The lieutenant governor is the governor's immediate successor and takes over as governor if the governor is unable to execute their duties, such as by resignation, impeachment, or death.
The governor or the state legislature may delegate particular duties to the lieutenant governor. These responsibilities may include official representation of the state, economic development promotion, and participation in policymaking.
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