Biology Middle School

What change in Earth's atmosphere alowed life to form?

a
Solar radiation split molecules
b
A meteor strike
c
The formation of the oceans
d
The development of an ozone layer

Answers

Answer 1

Answer:

D

Explanation:

the ozone layer formed and began to shield the surface of the Earth from the harmful ultraviolet light. This allowed life forms to evolve to survive on the surface of the oceans and on land and also allowed organisms who metabolize oxygen (like us!) to develop.

Answer 2

The change in the Earth's atmosphere which allowed life to form is the development of an ozone layer. Thus, the correct option is D.

What is the Ozone layer?

The ozone layer is a region of the Earth's stratosphere which absorbs most of the Sun's ultraviolet radiations. Earth's stratosphere contains a high concentration of ozone in relation to other parts of the atmosphere, although it is still present in small amount in relation to other gases in the stratosphere.

The ozone layer in the stratosphere absorbs a big portion of the radiations from the sun, preventing it from reaching the planet's surface. Most importantly, ozone absorbs the portion of UV light called UVB. UVB is a kind of ultraviolet light which comes from the sun that has several harmful effects.

Therefore, the correct option is D.

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Related Questions

PLEASE HELP OUT !!

Which options describe patterns found in the fossil record?
(Select all that apply.)

Earth’s species have remained constant throughout time.
Links exist connecting the lineage of different species.
Most of the species that have ever existed on Earth are still alive today.
Mass extinction events occur periodically throughout time.

Answers

First and last is the answer
I think it’s the second one , and the last one !! Hope that helped ,,, if so mark brainliest please !

heyyy can someone pleasee use the diagram to answer the true/false question xx

Answers

True.

I think I remember doing this question and getting it right and I think I picked true.

heyyy can someone pleasee use the diagram to answer the true/false question xx

Answers

Answer:

False

Explanation:

It will always be equally lit but we see the moon from different perspectives, hence making us think that we see the moon at different lit up amounts

False earth will also will be equality

Two students described a part of Earth's middle layer.

Bob: The deepest part Joe:
The semi-fluid part

Which part of the middle layer did Bob and Joe describe? (1 point)

a They both described the mesosphere.
b They both described the asthenosphere.
c Bob described the mesosphere and Joe described the asthenosphere.
d Bob described the asthenosphere and Joe described the mesosphere.

Answers

Answer:

joe is right

Explanation:

because that is the mantle

Joe is correct I took the quiz

Continental crust is composed of
A. metamorphic rock
B. igneous extrusive rock
C. sedimentary rock
D. igneous intrusive rock
PLEASE HELP 15 POINTS

Answers

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C. Sedimentary Rocks

Which of the following is NOT a function of the integumentary system?

a Helps regulate body temperature

b Eliminates waste from the body

c Helps move the body

Answers

I believe the answer is C
The correct answer is C

what is the purpose of headings in a table?
I do believe the answer may be C, but I got one question wrong and I want a 90 percent on this, so help is much appreciated!

Answers

I think the answer to this is C

A student is trying to model an ocean environment. What is the MOST important factor the student should add to the aquarium in order to make sure that the model is accurate?
A.starfish
B.seaweed
C.salt water
D.coral reef

Answers

Answer:

C: salt water

Explanation:

everything would be dead if there was no water

The most important factor while preparing a model of an ocean environment is Salt water. Marine ecosystems show high salinity. Thus, the correct option is C.

What is Ocean environment?

Ocean ecosystems or environments are characterized by the important factors which include the availability of light, food and nutrients. Oceans have some unique properties which include high salinity, the freezing point which is slightly lower than that of fresh water, density which is slightly higher than other waterbodies, electrical conductivity which is much higher, and the slightly basic nature.

Oceans are important as they feed us, regulates the climate, and generate most of the oxygen which we use for breathing. They also serve as the foundation for much of the world's economy, supports important sectors from tourism to fisheries to the international markets.

Therefore, the correct option is C.

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Explain why different mating systems exist.​

Answers

Answer:

.Mating systems are important to understand because they reflect the result of natural selection on mate choice, and ultimately on strategies for maximizing individual reproductive success

Explanation:

this is worth 30 points, help is much appreciated!

Answers

Answer:

A

He has to gather information to present to have a good graph presentation

Then,he will be able to get good remarks

Hope this help!

The answer to this has to be A

How many chromosomes do humans have in each cell?
A. 46 pairs, total of 92
B. 10 pairs, total of 20
C. 22 pairs, total of 44
D. 23 pairs, total of 46

Answers

The correct answer is C I hope this helps

heyyy can someone pleasee fill in the blankss

Answers

Answer:

the moon is one-fourth the size in earth diameter (write fraction in the blank.) the distance from the moon to the earth is  385,000  earth diameters. one of the limitations of this model is that it does not describe the movement of the earth and the moon in each of their orbits. complete the sentences below to add that information to the model it takes 27 days to orbit around the earth. the moon orbits earth in a  Circle

hi hi hi!!! i’ll lay this out so it’s easier to read! school can be so stressful and i hope your doing okay!

answer 1: 1/4
answer 2: 30
answer 3: about 27 days
answer 4: it’s orbiting in a circle... prograde direction!

i hope that was easy on the eyes to read, feel free to message me for any more explanation or clarification! ♡

How do wind and rain affect folded mountains?
(A) Weather wears down mountains and makes them smaller.
(B) Weather brings soil to to areas and the mountains larger.
(C) Weather causes tectonic plates to move, so the mountains are larger.
(D) Weather slows down tectonic plates, so the mountains stop growing.

Answers

Wind and Rain are known to (A), wear down mountains because wind and rain are primary causes of weathering of mountains as well as other natural landforms.

Answer:

A

Explanation:

The Ring of Fire is the result of tectonic plates, huge slabs of Earth's crust that fit together like
pieces of a puzzle. The plates are constantly moving atop a layer of solid and molten rock called
the mantle. Sometimes these plates collide, move apart or slide next to each other.
How does the analogy to a puzzle help the reader to understand tectonic plates?
(A) It helps the reader to imagine how large and heavy they are.
(B) It helps the reader to consider their exact shapes and curves.
(C) It helps the reader to visualize how their edges meet and align.
(D) It helps the reader to understand that they can be lifted.

Answers

Answer:

the answers is C) It helps the reader to visualize how their edges meet and align

Plate movement results in three types of tectonic boundaries: convergent boundaries, where plates move into one another.

It helps the reader to visualize how their edges meet and align.

How can you describe the movement of plates?Plate movement results in three types of tectonic boundaries: convergent boundaries, where plates move into one another, divergent boundaries, where plates move apart, and transform boundaries, where plates move sideways in relation to one another. They move at a one to two inch (three to five centimeter) per year rate.The numerous tectonic plates constantly shift and interact. This motion changes the shape of the Earth's outer layer. This process produces earthquakes, volcanoes, and mountains.According to plate tectonics theory, pieces of the Earth's lithosphere are in slow, constant motion as a result of mantle convection currents.

To learn more about :  plate tectonics theory

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