Why was the evolution of cyanobacteria such a significant event in Earth's history?
Answers
Answer:
Cyanobacteria are blue-green algae that produce chlorophyll and undergo photosynthesis. Oxygen, a byproduct of that photosynthesis, was released into the atmosphere, changing it in such a way that it may have allowed the evolution of more complex forms of life.
Explanation:
Right on ED2021 practice, goodluck! :) Happy holidays!
Related Questions
Dichotomy means _____.
Answers
Answer:
Branching into two different parts, think of a tree, the trunk of a tree will branch into two equal parts, and then continue growing at about the same rate.
20 pttttttttt quickk
Answers
C
Explanation:
None
8
Subduction is when one plate goes under another plate. What causes this plate to go under the other plate?
A it is less dense than the top plate
B it is more dense than the top plate
the plates are part of the Ring of Fire
D volcanoes forced the magma to go underneath
<
Answers
Answer:
B
Explanation:
If it is denser it will more likely sink because of convection currents forcing it down.
Answer: b
Explanation:
Fill in the blank
DNA IS NOT “TURNED ON” ALL OF THE _____ IN ALL OF THE CELLS.
Answers
Describe some of the changes in the land and in life-forms that occurred at the end of the Paleozoic Era.
Answers
during the end of the paleozoic era it was probably one of the greatest mass extinctions on earth and the land started to break up and move around to form what the world looks like today
explain why the gametophyte plants live in moist habitats
Answers
Answer: Unlike the vascular sporophytes, the gametophytes have no vascular tissue at all. These gametophytes are therefore very small, and develop best in moist areas, where they can absorb water directly from their surroundings. Like the bryophytes, ferns and fern allies are still restricted to moist habitats.
Explanation:
What does the green circle part of the graph represent?
A. Primary succession
B. Secondary succession
C. Pioneer specialist
D. Natural disasters
Answers
Answer:
Natural disaster does the green circle mean
The increased availability of genetically modified food has
A)
made such products commonly acceptable.
B)
eliminated famine in developing nations.
C)
made food cheaper to grow in drought areas.
D)
created controversy in the field of bioethics.
Answers
Answer:
B.
Explanation:
This way poorer countries no longer spend so much for so little.
Eliminated famine in developing nations.
How would the author of "Are 'Green' Cars Really All That Green?" dispute the claim in "Cars Without Gasoline Are Here" that biofuels are a good replacement for fossil fuels?
Answers
Answer:
A. By noting that biofuels come from vegetables such as corn and sugar beet.
Explanation:
The author claims that biofuels are a good replacement for fossil fuels in the vehicles because it produced less carbondioxide gas as compared to fossil fuels. The biofuels also produced pollution but less as compared to fossil fuel. This biofuel is extracted in the form of Bioethanol which is a type of alcohol made by fermentation process of starch crops such as corn, sugarcane, or sweet sorghum. This biofuel made from biological materials that decrease the production of carbondioxide gas.
Which is a greenhouse gas *
o methane
o carbon dioxide
o chloroflourocarbons
o all of the above
Answers
The main greenhouse gases are: methane, carbon dioxide, chlorofluorocarbons, ozone, nitrous oxides and water vapor.
Answer:
Carbon Dioxide, And Methane
Explanation:
Carbon Dioxide is one of the correct answers because Carbon Dioxide is kinda essential to live. Carbon Dioxide helps Trees and stuff of that nature. Methane is a GreenHouse Gas because if Methane gets leaked into the atmosphere, it absorbs the Sun's heat, which warms the atmosphere. If you see any fault with my answer please let me know. Thanks. Have a good day.
need help asap please :( I think its C but I don't think that's right
Which of the following most correctly represents biomanipulation through the top-down model?
Addition of quaternary consumers, so that tertiary consumers can decrease
Removal of tertiary consumers, so that secondary consumers can increase
Addition of primary producers, so that secondary consumers can increase
Removal of secondary consumers, so that tertiary consumers can increase
Answers
Answer: I am taking this flvs test right now and I think it might be A or B
I think the final answer would be A
Explanation:
The reason I don't think its C because the addition of primary producers wouldn't directly affect secondary consumers. It would first affect the primary consumers.
The only answer that would directly affect a certain group is A.
Should humans continue to use uranium yes or no and the reason
Answers
Answer:
Yes
Explanation:
Because uranium decays by alpha particles, external exposure to uranium is not as dangerous as exposure to other radioactive elements because the skin will block the alpha particles. Ingestion of high concentrations of uranium, however, can cause severe health effects, such as cancer of the bone or liver.
If you are to say yes then the reasonings most would give is the continued energy usage we would gain from it. How this energy could be used to reduce the strain on the environment and how cost effective nuclear energy is in comparison to anything else in the world.
If you say no then it could be for the danger it poses to humans when used for bad or the waste it generates which can not be recycled or destroyed and just has to be buried. Don’t forget it’s extensive usage in nuclear weaponry as well.
Ki,ss me if I'm wrong. But dinosaurs still exist right?
Answers
Answer:
No, dinosaurs have died out a long time ago!
But did you know that dragonflies used to exsist back then? They were way bigger than they are now. Alot of animals are evolutionalized versions of their prehistoric forms!
Explanation:
Could someone PLEASE HELP ME !
Answers
Answer:
c
Explanation:
Can i get brainlists
The first one is right
An extra chromosome is known as a trisomy and one less chromosome is known as a monosomy. Why are these good words for a disorder with extra or missing chromosomes (look at the root words)?
Answers
Answer:
prefix meaning for "mono" means "one and "tri" means three
These are good words for a disorder missing a chromosome (mono) or having an extra (tri) since it is litterally telling you it either has 3 or 1 chromosome
Tell me more about the parts of the water cycle and how they work.
Answers
Answer:
QUESTION:
Tell me more about the parts of the water cycle and how they work.
ANSWER:
The water cycle consists of three major processes: evaporation, condensation, and precipitation. ... In the water cycle, liquid water (in the ocean, lakes, or rivers) evaporates and becomes water vapor. Water vapor surrounds us, as an important part of the air we breathe. Water vapor is also an important greenhouse gas.
Explanation:
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Dihybrid Punnett Square Homework 1 Susan and Tim both have red hair which is recessive to brown hair. Susan is heterozygous for dimples(dominant) and Tim has no dimples. Create a Punnett square that shows the genotypes of all the possible offspring that could result from Tim and Susan! Use R or r for hair color. Use D or d for dimples or no dimples. What is the genotypic percentage? What is the phenotypic percentage?
Answers
Answer:
1222
Explanation:
121
After using a chemical mutagen to generate mutations in a dna sequence, scientists noted a mutation from c to t at the 10th position within the coding region of a gene. this mutation led to a change of proline into serine at the fourth position in the resulting peptide. using this information and the sequences listed below, select all the types of mutations that occurred.
Answers
Answer:
substitution, missense mutation, and transition
Explanation:
A mutation is any change in the genetic information of an organism. A substitution is a point mutation by which a single nucleotide base pair is replaced by a different nucleotide. Moreover, a missense mutation is a point mutation that results in the incorporation of a different amino acid in the polypeptide chain since this mutation generates a new codon which codes for a different amino acid. Finally, a transition is a point mutation where a purine (either Adenine or Guanine) is changed to another purine, or a pyrimidine (either Thymine or Cytosine) is changed to another pyrimidine (in this case, Cytosine is changed to Thymine).
am right, 20 pt and brainly
Answers
Answer:
Yeah, yeah
Explanation:
Answer:
can you upload a clearer picture its blurry.
Cytochrome C is a protein that functions in cellular respiration as part of the electron transport chain. It is frequently used to determine evolutionary relationships between different organisms because it is highly conserved (only differs slightly) between different organisms. A student researching evolutionary relationships between different organisms came across the following information about the differences between cytochrome C proteins in different organisms when compared to humans. Number of different amino acids compared to humansChimpanzee0Rhesus Monkey1Cow10Yeast42 The student plans to use an antibody to the human cytochrome C protein in an ELISA test on cytochrome C samples from these four organisms. What should she use as a positive control
Answers
Answer:
Human cytochrome C
Explanation:
The enzyme-linked immunosorbent assay (ELISA) is a technique widely used to detect and measure antibodies and antigens in biological samples. This technique can be used to diagnose different diseases by detecting antigens that bind to antibodies. The ELISA test consists of a plate with a capture antibody against the antigen of interest coating the plate. Subsequently, the target antigen is detected by adding a detection antibody labeled with an enzyme (e.g., alkaline phosphatase) that binds to this antigen. Finally, a particular substrate (e.g. ABTS) is added to the plate and the subsequent reaction converts it into a colored product which can be easily detected using microplate readers. In this case, the positive control will be human cytochrome C which will bind to specific antigens in order to evidence the presence of this molecule in the sample.
Using the karyotype below and the chart from the last screen:
A. Determine the sex of the patient
B. State the total number of chromosomes of the patient
Diannose the patient.
Answers
B. 47 chromosomes
C. Triple X syndrome
You are a geneticist working at a veterinary hospital. Your job is to help people understand genetic disorders that could affect their pets.
Answers
Answer:
To be connected with pet owners.
Explanation:
For doing this job, i have to be connected with the people having pets in their houses because with this interaction I provide all information about genetic disorders that their pet can gain. I will attend group discussion with these people in order to avoid threats of genetic disorder to their pets. With this information, these people are able to diagnose any genetic disorder symptoms in their pets and if we knew on time this genetic disorder can be eliminated from their pets and their health should be maintained.
Plants and animals have a mutualistic relationship. Explain how.
Answers
Answer:
They connect through a cycle
Explanation:
Both plants and animals can be a food source for animals. Plants also create an environment so that animals can live with less complications
The sun's inner core is the hottest part of the sun. (2 points)
True
False
Answers
Answer:
True
Explanation:
Answer:
true
Explanation:
because since the core is the farthest away from space it will continue to burn inside of the core, leading to more heat building up in the inner parts.
2. The formation of a new community where another community already exists is known as ______.
A primary succession
B secondary succession
C pioneer community
D pioneer species
Answers
Answer:
B secondary succession
Explanation:
A doctor has diagnosed a patient with atherosclerosis. When listening to the blood flow through
might the disease diagnosis affect the sound being detected by the physician?
The blood flow sounds different because the blood is flowing through
vessels with a narrowing of the inner walls of coronary arteries due to
buildup of fatty materials.
The blood flow sounds different because there is a widening of inner walls
of blood vessels due to a high salt diet.
B)
The blood flow sounds different because the walls of the heart have been
stretched due to a heart attack
D
The blood flow sounds different because there is an increased circulation
to the heart.
Answers
Answer:
The blood flow sounds different because the blood is flowing through vessels with a narrowing of the inner walls of coronary arteries due to buildup of fatty materials.
Explanation: Atherosclerosis is characterized by cholesterol deposits in the walls of the arteries. This can be hereditary but is often impacted by increased fatty diets.
The disease diagnosis affect the sound being detected by the physician is when the blood flow sounds different. hence, the first option is correct.
Impact on the sound that being detected:Since the patient was diagnosed with atherosclerosis so here the flow of the blood should be sounded different since the blood is flowing via the vessels that have the narrow inner walls because of fatty materials.
Also, Atherosclerosis should be contributed by the cholesterol that is deposited into arteries walls.
hence, the first option is correct.
Learn more about disease here: https://brainly.com/question/24596216
What nitrogen base does Cytosine pair with
Answers
Answer:
Guanine
Explanation:
There are four nitrogenous bases in DNA, two purines (adenine and guanine) and two pyrimidines (cytosine and thymine)
Adenine always bonds with thymine, and cytosine always bonds with guanine.
Which of the following is true about the Earth's natural resources?
A.
Natural resources were once formed by geologic processes inside the Earth, but they are now created only by human-made processes.
B.
The natural resources on Earth can never be used up because humans can always make more resources to replace them.
C.
The same natural resources are available in all areas of the Earth because the geologic processes that formed them occurred the same way in every location.
D.
Natural resources are unevenly distributed on Earth because the geologic processes that formed them occurred in different locations over time.
Answers
Answer:
im gonna have to go with D
Please no links to download thingies-Examine the data table, which shows data for quadrat #18.
Table
Compare the data you recorded in Table D of your Student Guide with Table D from quadrat #18 in the control group.
The average height of the sunflower sprouts in your quadrat is _______
the average height of the sunflower sprouts in quadrat #18.
Answers
Answer:
The answer to your question would be more than.
Explanation:
The average height of the sunflower sprouts in your quadrat is
greater than
the average
height of the sunflower sprouts in quadrat #18.
Brainliest? sorry it's late.
Answer:
greater or more than just did it
Explanation:
PLS SOMEONE I NEED HELP I WILL GIVE POIHTS AND I WILL MARK BRAINLIEST I WILL DO ANYTHING JUST PLS SOMEONE ANSWER ALL OF THIS I NEED THIS DONE ASAP PLS PLS PLS IM DESPERATE IM USING MY LAST POINTS ASKING THIS QUESTIONS SO PLS HELP ME
Answers
1. a) father (Rr), mother (rr)
b) from the attached file(1)
c) the possible genotypes are
Rr - 50%rr - 50%d) but from the information given above the only possible genotype for SpongeGerdy is Rr, because we were told that she was squarepants
e) Rr
f) from the attached file(2)
g) the possible genotypes are
RR - 25%Rr - 50%rr - 25%h) the genotypes for squarepants are RR and Rr
therefore probability is (25 + 50)% = 75% or 3/4
i) the only genotype for roundpants is rr
therefore probability is 25% or 1/4
2. a) wilba - Ee , wilbur -EE
b) from the attached file(3)
c) the possible genotypes are
EE - 50%Ee - 50%d) the genotypes for round eye are EE and Ee
therefore probability is (50 + 50)% = 100% or 1
e) the only genotype for oval eye is ee
therefore probability is 0
3. a) squidward - BB . squidette - bb
b) from the attached file(4)
c) the only possible gene is Bb - 100% or 1
d) the genotypes for a light blue skin are BB and Bb
therefore probability is (0 + 100)% = 100% or 1
e) the only genotype for a light green skin is bb
therefore probability is 0
f) No, they are not. this is because they are heterozygous i.e.( they carry gene for a light green skin)
g) from the attached file(5)
h) the possible genotypes are
BB - 25%Bb - 50%bb - 25%i) the genotypes for a light blue skin are BB and Bb
therefore probability is (25 + 50)% = 75% or 3/4
j) the only genotype for a light green skin is bb
therefore probability is 25% or 1/4