Which of the following was likely present in Earth's early atmosphere over four billion years ago?

Group of answer choices

Presence of DNA molecules

Very hot temperatures

Low levels of ultraviolet radiation

Abundance of oxygen

Answers

Answer 1

Answer:

low levels of ultraviolet radiation ;)


Related Questions

There are ____________ amino acids that share the same basic structure and serve as building blocks to proteins.
Group of answer choices

12

20

2000

200

Answers

Answer:

the final answer is 20

Explanation:

Hope it is helpful for you ✌️

ASAP PLEASE


What are some careers/jobs that use the scientific method while working?
Explain how each step is connected to a specific part in the job also


At least 3 THANK YOU

Answers

Answer:

Maybe an engineer.

Explanation:

They build stuff do experiments and have to guess and make hypothesis (what science has)❤️ I. really hope this helps:)

trình bày quá trình chuyển hóa glucid và sự phân bố đường sau ăn ?

Answers

Answer:

ghewbb your twalkings abotur I deont inderstaen yeigd sayidbfg?

A family paid ​$ 28,000 as a down payment for a home. If this represents 14​% of the price of the​ home, find the price of the home.

Answers

Answer:

175000.00

GBP

 

16

%

=

28000

so we can also say  

100

%

=

x

Then from here the rule says that you do  

100

×

28000

16

So if we do that we get a result of  

175000

That is the price of the home.

x

=

175000.00

GBP

Explanation:

So we must begin with a rule that is commonly used to work this out.

Hope this worked out <3

How is the plasma membrane of a cell like dialysis tubing?

Answers

Like a cell membrane, dialysis tubing has a semi-permeable membrane, which allows small molecule to permeate through the membrane. Thus, the dialysis tubing mimics the diffusion and osmosis processes of the cell membrane (Alberts, 2002). ... Instead, facilitated diffusion would be needed to transport the glucose.

Like a cell membrane, dialysis tubing has a semi-permeable membrane, which allows small molecule to permeate through the membrane. Thus, the dialysis tubing mimics the diffusion and osmosis processes of the cell membrane (Alberts, 2002). ... Instead, facilitated diffusion would be needed to transport the glucose.

What are the three most common generating forces of waves?

Answers

Answer:

,transverse waves,longitudinal waves,and surface waves

count how many cells are are in this picture

Answers

Answer:

there is no picture there lol

What do frogs (and all animals) need in order for their bodies to grow, develop, and repair themselves? How do animals use these materials for bodily processes?

Answers

Answer:

:P :P :P :P :P :P :P :P :P :P :P :P

Question 15(Multiple Choice Worth 3 points) (03.04 MC) Which of the following is most likely an impact of hurricanes? A. Acid rain in coastal areas B. Health problems due to smoke C. Wildfires in forests far away from sea D. Damage to property due to strong winds​

Answers

Answer:

Explanation:

Hurricanes do not effect acidity

Smoke is not caused by hurricanes

There is no known correlation between wildfires and hurricanes

Hurricanes are defined as rain and wind

Answer: Damage to property due to strong win

Explanation: hurricanes are known for having strong winds and destroying property due to strong winds

(FREE PONTS! JUST COPY AND PASTE THE ANSWER BELOW )

In which stage of the Calvin cycle does the plant cell produce energy for storage?
A. Regeneration
B. Carbon Fixation
C. Reduction <

This is the correct answer (COPY AND PASTE)
Reduction

Answers

Answer:

reduction

Explanation:

Answer:

CARBON FIXATION

Explanation:

need an answer, please need an answer, please..
no copy​

Answers

Answer:

Impacts from human activity on land and in the water can influence ecosystems profoundly. Climate change, ocean acidification, permafrost melting, habitat loss, eutrophication, stormwater runoff, air pollution, contaminants, and invasive species are among many problems facing ecosystems.

Question 4 of 34 4
Where are electrons located?

Answers

Answer: they rotate the nucleus creating the "outer casing" that you see in diagrams

Explanation:

Match the key elements in the Scientific Method with the correct description. 4. A researcher asks a focused research question or states their reason for the study
A) state the problem
B) state the hypothesis
C) come to a conclusion
D) collect background information
E) conduct experiments

Answers

b. State the hypothesis

What is the term used for population moving into an area ?

Answers

Answer: Immigration.

Explanation: Hope that helps I'm sure that this is right

. How much time does it take a person to walk 12 km north at a velocity of 6.5 km/h

Answers

Answer:

It will take 1.85 hours to walk 12 km north.

Answer:

Explanation:

v=[tex]\frac{d}{t}[/tex]

and the d here is the distance which is equal 12 km

the time is still unknown

and we know the velocity which is 6.5 km/h

and according to the triangle of the velocity "search that up "

t =[tex]\frac{d}{v}[/tex]= [tex]\frac{12}{6.5}[/tex]≈1.8 hours

Plz help I need help

Answers

Answer:

D

Explanation:

Studied this recently.

Where was the Bali tiger found

Answers

Answer:

The famous Bali tiger is now an extinct subspecies that was found only on the island of Bali in Indonesia.

Explanation:

Bali tiger found on the small island of bali near Malaysia and Philippines in the Indian ocean.

in this environment, the fish represents which type of organism?
A. Heterotroph
B. Producer
C. Autotroph

Answers

Heterotroph, a fish cannot make its own food/energy so that rules out producer and autotroph

Identify organelles in a plant cell with the diagram below.

Answers

Answer:

A - cloroplast

b- vacuole

c- cell wall

d- nucleus

Explanation:

I found the same picture online. I just looked up organelles in a cell plant and it was one of the first ones

Answer:

A - cloroplast

b- vacuole

c- cell wall

d- nucleus

Explanation:

i got the answers from this image (kepp this image because it might also help you) and please brainlest

Identify and investigate the properties of minerals. Identify and classify a variety of rocks.
based on physical characteristics from their origin, and explain how they are related using the
rock cycle. (i.e. Sedimentary, igneous, and metamorphic rocks)

Answers

Answer:

Igneous rocks are classified on the basis of their composition and their texture. Magma, and the igneous rock it becomes, has a range of chemical compositions. For example, basalt is a mafic lava flow rock which originates from melting of the upper mantle.

Explanation:

Answer:

There are three main types of rocks: sedimentary, igneous, and metamorphic. Each of these rocks are formed by physical changes—such as melting, cooling, eroding, compacting, or deforming—that are part of the rock cycle. Sedimentary rocks are formed from pieces of other existing rock or organic material.

Explanation:

Hope This Helps!

Crowdsourcing was used to solve problems for what science discipline?

Answers

Answer:

A. Science relies on observation, measurement, and experimentation.

Explanation:

ok Np bye!

Which of the following is an indicator of good water quality? (2 points)

Answers

Answer→ Physico-chemical indicators

Explanation ≈  They include dissolved oxygen, pH, temperature, salinity and nutrients (nitrogen and phosphorus). They also include measures of toxicants such as insecticides, herbicides and metals.

Wastewater treatment plants can make wastewater drinkable again. Which of
the following is a technology used to remove solids from the water?
O A. Treating the water with certain bacteria and air
O B. Shaking and skimming them from the surface of the water
O c. Adding hydrochloric acid and chlorine to the water
O D. Filtering and allowing them to settle out of the water
SUBMIT

Answers

Answer:

D

Explanation:

I'm not 100% sure this is right but it's a better answer than B

Radiating heat travels in waves moving at about 300,000 km/sec true or false?

Answers

Answer:

True

Explanation:

arfswg;iljghobfweolbvflds

Answer:

Yes

Explanation:

because of the Hottness

How do ocean currents transport heat around the earth?

Answers

Answer:

Ocean currents act as conveyor belts of warm and cold water, sending heat toward the polar regions and helping tropical areas cool off, thus influencing both weather and climate. ... The ocean doesn't just store solar radiation; it also helps to distribute heat around the globe.

Hope I helped you! <3Miss Hawaii

Explanation:

Your answer is -, sending heat toward the polar regions and helping tropical areas cool off

A concentration gradient affects the direction that solutes diffusion. Describe how molecules move with respect to the concentration.

Answers

Answer:a

Explanation: took it

Answer:

If a concentration gradient exists, molecules will move from areas of high concentration to areas of low concentration until the concentration gradients have equalized

Explanation:

I don't really have an explanation but there's the CORRECT answer.

protons, neutrons and electrons in atoms determine the number of valence electrons determine the stability of the atom based on above​

Answers

Answer:

atoms determine the number of valence electrons determine the stability of the atom based on reading the topography of the atmosphere

Which pH indicates a basic solution?
1.
1
2.
5
3.
7
4.
12

Answers

Answer:

7

A pH value greater than 7 indicates a basic solution. The more the pH value exceeds 7, the more basic is the solution.

7 is the answer.

If the pH is 1, that means the substance is sour or acidic.

If it has a pH of 5, then it is not that acidic.

If something has a pH of 12, then it is almost completely basic.

If something has a pH of 7, then it is basic.

Hope it helps! :)

Which of these questions could BEST be answered with the methods of science?

a. How is Earth different from other planets?
b. What does it mean to be a good person?

c. Will computers make us more or less human?

Answers

Answer:

A

Explanation:

It is about planets and planets are in space.

-- How do scientists predict the weather over our future?

Answers

The Short Answer:

To predict future climate, scientists use computer programs called climate models to understand how our planet is changing. Climate models work like a laboratory in a computer. ... Scientists use computer programs called climate models to understand how our planet is changing.

Other Questions
ANSWER FOR A CHANCE TO WIN A TESLA MODEL X(image down below) Simplifyx + x + x + y X y X y the product of a number and -3 increased by 8 is no less than 35 43. Which of the following approach to labeling compares a child's growth pattern to a group average. Samantha spent 40 minutes on homework sixty percent of that time was spent on language arts how many minutes were spent in language art why do you think there is such a variety of industries involved with plants? is -10 equal to 4 what is the answer Do you like them?????????????????????????????????? Evaluate Canada as an example of either an individualist or collectivist society. Can someone explain the summary of chapter 2 for Falling Leaves? PLEASE ANSWER AS SOON AS U CAN! According to morrie why is it important to detach from certain emotions and situations 5. Ari is playing a board game. After 3 moves he is onspace 17. Ari's first move was forward 2 spaces, andhis third move was forward 7 spaces. What was Ari'ssecond move? Explain how you found the answer. PLEASE ANSWER ASAP BREAIANEST!!!! what is one of Hamilton's arguments in favor of a four year term for presidents? A jar has 20 marbles: 3 green, 12 blue, 5 red.What is the probability of randomly choosing a red and then a green marble (keep the red marble when you choose it)? the sum of eight times a number and fifteen is seven. find the number. your motherboard has sockets for 184-pin dimm ram. which type of ram should you install? Write the equation of the line that passes through the given points. (-1. -1.5) and (0, 3.5) What are the things circled called? You can answer the question fully too if youd like. I really need help in understanding this. 9.2 g of sugar is needed for every cake made how much sugar is needed for six cakes.