What caused the oxygen levels in Earth’s atmosphere to increase during the Precambrian time? Choose the correct answer.
Land plants evolved and released oxygen as they grew.
The chemical weathering of granite released large quantities of oxygen.
Oxygen dissolved in the ocean was released by osmosis into the atmosphere.
Cyanobacteria consumed carbon dioxide and released oxygen as a waste product.
Answers
The Precambrian era is said to have taken place during the early years of our planet. During this time, the levels of oxygen in the atmosphere were much greater than they are today.
This level of increased oxygen in the atmosphere is a direct result of the biological processes and the sheer number of certain organisms present in Precambrian-era oceans.
Though the options stated all depict ways in which oxygen entered the atmosphere during the Precambrian era, the increase of oxygen levels is credited to the cyanobacteria.
The cyanobacteria were among the few living organisms present on the Earth during this time. They are small algae that use photosynthesis to sustain themselves.
Photosynthesis is known to produce and release oxygen as a waste product. This and the vast number of cyanobacteria present at the time account for the increase in oxygen levels during this era.
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Related Questions
imagine that jesus is standing before you what kind of help will you ask him to give you and why
Answers
Answer:
Explanation:
I have alot of help to ask Jesus if He is standing before. First I will seek for mercy that He should show me mercy in all ramifications because He is merciful and mercy prevail over judgement.
His mercy can speak when other things cannot, by His mercy we are saved and redeemed.
I will also ask for the grace to love and serve Him because it is all in Him I can have ALL to the fullest.
I will seek help for His lifting because whosoever He lifts is Looking Fred forever...
I will ask for settlement in all areas because who ever He settled is settled and fulfilled forever...
I will ask so many things that I can't remember now because He can do all things and He is always willing to help.
Thanks.
The thylakoids membrane is the location of which part of photosynthesis?
A. Light reaction
B. Calvin cycle
Answers
Answer:
A
Explanation:
Light-dependent reactions happen in the thylakoid membrane of the chloroplasts, while the Calvin cycle happens in the stroma. They occur when in the presence of sunlight. Hope this helps!
Scientists have observed that new crust, such as mid-ocean ridges, is formed where two plates are moving away from each other. Based on this observation and the data on the maps, where do you suspect that old crust is destroyed and recycled? Provide three specific locations on the map where you think this process is occurring
Answers
Answer:
Old crust is destroyed at boundaries where two plates are moving toward each other, or converging. Specific examples include the Australian and Pacific plates, the Caribbean and Cocos plates, and the southwest corner of the North American plate and the Pacific plate.
Explanation:
Having studied tectonics in school, Roberto grew interested in tectonic plates and how they move. Plates move in different ways along plate boundaries.
What determines how the plates interact at their boundaries?
A. the materials the plates are made of
B. the difference in thickness of the plates
C. the kind of plates they are and whether they keep moving
D. the kind of boundary and the directions in which the plates are moving
Answers
Answer:
Suppose we add up alternate Fibonacci numbers, Fn-1 + Fn+1; that is, what do ... L(1)=1 and L(3)= 4 so their sum is 5 whereas F(2)=1; L(2)=3 and L(4)= 7 so their ... What is the relationship between F(n-2), and F(n+2)? You should be able to find a ... Fib(N); K (an EVEN number!), Lucas(K) and Fib(K) in each expression like ...
Explanation:
The kind of boundary and the directions in which the plates are moving determines how the plates interact at their boundaries. Therefore, option (D) is correct.
What is plate tectonic?There are two main categories of tectonic plate interactions: Divergent boundaries are places where plates separate from one another, creating rift valleys or mid-oceanic ridges. Additionally called as constructive borders, they are. Areas where plates move toward one another and clash are known as convergent borders.
The movement of plates, known as plate tectonics, has a significant influence on our globe even though they move extremely slowly. Mountains, continents, and seas are created by plate tectonics. It also enables us to comprehend the causes and locations of occurrences like earthquakes and volcanic eruptions.
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What is the answer to this question
Answers
Answer:
tertiary!!!
Explanation:
brainliest pls!
The answer is the 3rd one
Any one please help ASAP no links please
Answers
Answer:
The net force on the vehicle is 1534
Explanation:
I am not always accurate but I hope this helps!
What are the SIX parts of a DNA molecule?\
Answers
Answer:
DNA is made up of six smaller molecules -- a five carbon sugar called deoxyribose, a phosphate molecule and four different nitrogenous bases (adenine, thymine, cytosine and guanine)
Explanation:
.
9. What does energy efficiency mean?
A. How much useful work we can get from each unit of energy used
B. How fast the energy can be expended
C. The maximum amount of energy an appliance can use
D. The overall energy use that is tracked throughout time
Answers
Answer:
The answer is A
Explanation:
Please only respond if you know the answer and links will be reported
Answers
Answer:
Your answer is D. Proteins
Explanation:
Carbon is found in A,B, and C.
The oxygen and carbon dioxide exchange that occurs during photosynthesis and respiration help to
Answers
release carbohydrates
The oxygen and carbon dioxide exchange that occurs during photosynthesis and respiration aid in the release of carbon dioxide and the utilization of oxygen produced by the photosynthetic process.
What is the significance of respiration and photosynthesis?The photosynthetic process is the one that can make oxygen as a product, and later that oxygen is used by plants and other animals in the process of respiration, which is essential for life as the cell makes energy in this process. Plants and other chloroplast-containing photosynthetic organisms, such as blue-green algae, phytoplanktons, etc., can produce oxygen, which is then used in respiration to power the cell's activities.
Hence, the oxygen and carbon dioxide exchange that occurs during photosynthesis and respiration aid in the release of carbon dioxide and the utilization of oxygen produced by the photosynthetic process.
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Describe an experiment to show that
Shoots are positively phototrophic.
Answers
Answer:
A well-watered potted plant is placed inside the box. If the window is kept closed for about 24 hours the plant shows normal growth. If the window is kept open, it is found after two days that the shoot tip bends and grows towards light proving that it is positively phototropic.
Explanation:
Hope this helps! Brainliest pls?
PLEASE HELP THIS IS DUE IN AN HOUR
Veins have all of the following characteristics: (choose 4)
A)Large lumen (space inside the vessel)
B) Thick walls
C) valves
D) small lumen (space inside the vessel)
E) thin walls
F) one cell thick
G) low blood pressure
Answers
Answer:
A. Large lumen
C. Valves
E. Thin walls
F. One cell thick
*let me know if I got anything wrong, I doubled checked it :))
Answer:
A,C,E,G
Explanation:
What is the significance of a global mean=53?
Answers
Answer:
Global Warming i Think.
Explanation:
What does the S phase of interphase have to do with DNA replication?
Answers
Answer:
The sister chromatids remain joined together until mitosis, when they segregate into two daughter cells.
Explanation: i am sorry if this is wrong
Solar tracking, or _____, is a plant's growth toward light.
Answers
WILL GIVE BRAINLIEST!
Consider the attached genetic code chart and the following DNA sequence.
DNA sequence 3' TAC GGG AGT CTT TCC ACT 5'
What would be the mRNA sequence?
What would be the amino acid sequence?
What would occur to the amino acid sequence if the following mutation (G --> C in bold below) were to take place?
DNA sequence 3' TAC GGG ACT CTT TCC ACT 5'
What type of mutation is this?
Answers
Explanation:
TAC GGG AGT CTT TCC ACT -DNA
AUG CCC UCA GAA AGG UGA -mRNA
Met Pro Ser Glu Arg Stop -Amino acid sequence
Can't see the bold :/
Insertion mutation I believe.
A codon chart can be used to read the genetic code. To utilize this chart, start by finding the first codon nucleotide, then the second, and finally the third. The chart will then show which codon codes for the amino acid. Because the genetic code is degenerate, there are several codons for each amino acid.
What role of genetic code in DNA sequence?The genetic code serves as the body's language for converting the DNA instructions from our genes into the constituent parts of life. It is typically discussed using the “codons” found in mRNA since mRNA is the messenger that transmits information from the DNA to the site of protein production.
Therefore, TAC GGG AGT CTT TCC ACT -DNA
AUG CCC UCA GAA AGG UGA -mRNA
Met Pro Ser Glu Arg Stop -Amino acid sequence
Insertion mutation.
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What is the worst kind of pollution? air pollution, water pollution, or land pollution? Defend your answer. (Please explain why you think it is the worst kind of pollution)
Thank you.
Answers
Answer:
i think air pollution
Explanation:
of course the other two pollutions are harmful but with air pollution the harmful chemicals are going straight into your respiratory system. this is why people in asia wear masks, there’s so many harmful chemicals in the air from the factories.
Does anyone know this? Please help! Due in 45 min
Answers
Answer:
I think it's A tell me if it's wrong
hope it helps
have a good day :)
Explanation:
Answer:
D. l,ll, and lll
Explanation:
Hope this helps!
A producer is an organism that
A. eats other organisms
B. makes it own food
Answers
Answer:
B makes it own food
Explanation:
have a great day
Answer:
B. makes it own food
Explanation:
A producer is an organism that makes it own food
What amazing adaptation does the snowshoes hares have?
How does this adaptation help it to survive or reproduce?
Answers
Answer:
Snowshoe hares have an interesting adaptation that helps protect them against predators. Depending on the season, their fur can be a different color. During the winter, snowshoe hares are white, which helps them blend in with the snow.
Explanation:
hey, you ok?
Now I know that my sense organs enable me to ______________.
Answers
Answer:
Now I know that my sense organs enable me to Feel
Which of the following conditions are required for natural selection?
I. overproduction of offspring
II. competition for resources
III. genetic variation
IV. natural disasters
Answers
Answer:
I think the answer is III. genetic variation
what is the significance of pH?
Answers
4.) Why would a fetus who is born at the beginning of the third trimester have a difficult time surviving?
Answers
How is the sense of touch different from the other senses?
Answers
Answer:
Touch is, in several ways, seemingly different from these other senses, however. For one thing, touch does not seem to have a single sense organ. ... Instead, the skin contains many different sensory systems. Many of them, like those that code for pain and itch, do not seem to be tied directly to the sense of touch.
Explanation:
Touch is often classified as one of the traditional five senses, along with sight, hearing, smell, and taste. Touch is, in several ways, seemingly different from these other senses, however. For one thing, touch does not seem to have a single sense organ. ... Instead, the skin contains many different sensory system
please help! Phylogenic trees represent hypotheses of relatedness based on evidence. What is a common mistake taxonomists can make when attempting to place seemingly closely-related species into a phylogenic tree?
The two species share many structural proteins, genes, and metabolic pathways.
The two species share an evolutionary history based upon matching DNA.
The two species seem to be located in the same region on the planet.
The two species share similar morphology or character traits.
Answers
Answer: The two species share similar morphology or character traits.
Explanation: Traits may be similar, but they could be analogous and only similar due to convergent evolution. Also, I just took a quiz with this question and got it right.
Help please guys I’ll give brilliant
Answers
Answer:
it think the answer is 1232 because i dont
explanation:
i d k
Could anyone put these in order?
Answers
Which of these most likely explains why the bacteria population stopped
growing?
A. The bacteria came in contact with a virus that killed off the population.
B. The bacteria could not produce any longer because the population was too large.
C. The bacteria competed for nutrients and died after all of the nutrients were
consumed
D. The bacteria evolved into another organism.
Answers
Answer:
C. The bacteria competed for nutrients and died after all of the nutrients were
consumed
Explanation:
Since no other materials were added, this option makes the most sense.
Almost all the energy and associated biomass in Earth's ecosystems comes from the
Sun. Which of the following is NOT true regarding energy transfer through an
ecosystem?
A
Decomposers recycle the matter contained by the dead biomass and waste and
make it available for use by producers and other consumers.
Ninety percent (90%) of the available energy is transferred from one trophic level
to the next. About 10 percent (10%) is lost to the atmosphere as heat.
с
Ecosystems sustain themselves by continuously cycling matter through the
trophic levels and capturing energy from the Sun or Earth and transferring it up
the food chain.
D
Energy flows from the Sun or from rocks through the primary producers and the
successive levels of consumers.
Answers
Answer:
D . Energy flows from the Sun or from rocks through the primary producers and the successive levels of consumers.
Explanation:
Energy flows only through the sun not the rock because sun is the ultimate source of energy which can be used by the plants for making their own food in the form of glucose during the process of photosynthesis. This plant is then eaten by primary consumer known as herbivore. These primary consumer is eaten by secondary consumer is called carnivores. The tertiary consumer feeds on the secondary consumer and so on. In the end, decomposers feed on the dead bodies of animals and releases nutrients which can be used again by the plants for making food.