Answer:
Urey and miller cooked a "primordial soup" with Hadean gases, water and electricity to make glucose, acetic acid, amino acids and lipids.
Explanation:
In the Miller-Urey experiment, the aim was to reproduce the conditions of the earth before the existence of life, with the objective of demonstrating the formation of organic matter from inorganic molecules.
The scientists took water and gases present in the Hadean eon —previous to the existence of life— such as methane, carbon dioxide, hydrogen, nitrogen and even ammonia, the primordial soup. This mixture was subjected to electrical discharges, inside closed containers.
The results were some organic molecules, including glucose, acetic acid, amino acids and fatty acids. In these results the presence of macromolecules, such as proteins or nucleic acids, is not appreciated, however it was a significant contribution to the knowledge of the origin of life on earth.
How many wilderness areas are there in the United States?
a.
25
b.
50
c.
120
d.
474
Answer:
474
Explanation:
took test
The Forest Service and three other federal land management agencies currently oversee 474 wilderness areas totaling more than 111.7 million acres as part of the National Wilderness Preservation System. Thus, option D is correct.
What importance of wilderness areas in an ecosystem?The risk of extinction is reduced by wilderness, with the risk being doubled for species found outside those places.
Additionally, a variety of species can be found in both wilderness and non-wilderness places, and their ability to survive depends heavily on the wilderness's undisturbed habitat.
The advantages of wilderness are many. There is so much more to wilderness than just a place to camp, trek, or fish.
Our water and air are purified by wilderness. It serves as both a habitat for wildlife and a source of income for nearby towns.
Therefore, 474 wilderness areas are there in the United States.
Learn more about wilderness areas here:
https://brainly.com/question/27986680
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Photosynthesis occurs in which organisms?
Answer:
Photosynthesis occurs in green plants, seaweeds, algae, and certain bacteria. These organisms are veritable sugar factories, producing millions of new glucose molecules per second
Explanation:
As energy flows through an ecosystem, energy ____ as it moves to the next trophic level
A. decreases by 10%
B. increases by 90%
C. decreases by 90%
D. increases by 10%
Which is true about all unicellular and multicellular organisms?
O They are made of one cell.
O They reproduce.
They cause infections.
O They are made of multiple cells.
A dog is part of which sphere of earth
Answer:
I think it would be biosphere
Explanation:
Bio means of life or living things. Birds fly through the atmosphere, water flows through the soil and the dogs drink the water
Hope this helps!
WILL GIVE BRAINLIEST, PLEASE HELP ASAP TIME LIMITED WILL:
In pea plants, the gene for the color of the seed has two alleles. In the Punnett square shown below, the dominant allele (Y) represents yellow and the recessive allele (y) represents green.
Based on the Punnett square, what percentage of offspring would have genotype YY?
0%
25%
50%
100%
Where within the cell does photosynthesis take place?
A. The cytoplasm
B. The chloroplasts
C. The mitochondria
D. The nucleus
Answer:
B.) The chloroplasts
Explanation:
I have science
Answer:
B
Explanation:
Gizmo
Please help me with short note on Lamarckism.
Answer:
Explanation:
Lamarckism, or Lamarckian inheritance, also known as "Neo-Lamarckism", is the notion that an organism can pass on to its offspring physical characteristics that the parent organism acquired through use or disuse during its lifetime.
plz mark as brainliest
Which organelle stores waste and water in both plant and animal cells?
Answer:
vacuole
Explanation:
Answer:
The organelle that stores waste is the vacuole.
Which statement does NOT accurately describe eukaryotic and prokaryotic cells?
Answer:
You did not provide any options so i will give some facts that will hopefully help you in figuring out the correct answer.
For prokaryotic cells, the cell wall is a tough, fibrous layer that protects the cell and gives it shape and rigidity.
Prokaryotic cells are found in the domain(s) Bacteria and Archaea.
True: Prokaryotic cells have nucleoids and eukaryotic cells have nuclei.
A prokaryotic cell is distinct from a eukaryotic cell because a prokaryotic cell lacks _a nucleus_.
There is only _1_ eukaryotic domain, it is Eukarya.
Why do the plant and animal cells SHARE some levels of classification?
Why are some levels of classification DIFFERENT?
Answer:
Evolution and adaptation
Explanation:
I would say that the first reason for animal and plant cell to be alike in some ways is for the main reason of us being derived from the same original source but the difference between the cells comes with the organisms adaptation to the different environments. hope that helps!
What is a magliant tumor?
Answer:
a mass of cancer cells
Explanation:
u have the right answer
Answer:
a mass of cancer cells.
pls help pls pls pls
Answer:
All of them are correct
Explanation:
Becuase the mom have freckles and the dad does not so the kid has a 50/50 chance of having freckles
the genotype chart would give you these four combinations so all of these awnsers will be correct
Which of the following would be considered matter? Choose
all that apply.
A. light from the sun
B. milk in a carton
C. heat from a candle
D. sound of booming thunder
E. pebble on a beach
**for science
Answer:
B) milk in a carton and E) pebble on a beach. This is you answer
Explanation:
If an adult burns her full frontal body area, half her head/neck region, and her complete right arm, what percentage of her body is burned?
Answer:
50%
Explanation:
the front of the body is burned and, y'know I'm just right
Complete the following analogy.
Nucleus is to cell as _____ is to company.
President
Security Guard
Secretary
Answer: secretary its right
Explanation:
Answer:
secretary
Explanation:
i do oddysseyware
What are the two main processes that provide most of the energy transfer for life processes within an ecosystem?
Answer:
Photosynthesis and cellular respiration
Explanation:
including (anaerobic processes) provide most of the energy for life processes.
Help me, out of these, which ones are a series circuit and which are parallel
Answer:
1.
1.
2.
2.
2.
1.
Explanation:
Although Arroyo does not mention the term "watershed," it was discussed in the unit as being closely related to and impacted by drought and floods. Please discuss how the watershed relates to drought and heat. How might Arroyo have integrated the term watershed into her talk?
Answer:
Arroyo integrated the term “watershed“ by saying that Oxfam and Swiss Re with the Rockefeller foundation are helping farmers building hillside terraces to conserve water and they are also providing for insurance when the droughts do come.Water shed relates to drought and heat because it will suffer and there would be less water to fill surface water resources and less water to make its way through the earth and into groundwater reservoirs.
(Need help) If you Were a Scienctist,describe the information about parts of the universe that could be collected using electromagnetic waves
electric bells .... maybe I am not sure
should wolves be reintroduced in isle royale?
You can determine if something is alive or not based on whether it moves
or not.
True ,False
Warm tropical water will tend to have a higher concentration of....
a, dissolved oxygen
b, zooplankton
c, Photic zone
d, salt
Answer:
Um B I hope my answer is right!!
Explanation:
Stem cells can become any type of cell in the human body, making them ideal for many types of therapies. One area of possible use is in brain cell transplants that could help people with spinal cord injuries and neurodegenerative diseases such as Parkinson's disease. Even though there is great potential for helping people, what is one ethical issue that could arise from the use of stem cells?
Answer and Explanation:
Stem cell transplant in the brain is not clinically approved yet. The only scientific and ethical via to generate a treatment is through an approved clinical essay. Clinical investigation in the stem cell transplant involves an important and long study of the risks and benefits relationship before the treatment begins. However, the transplant is an invasive method directed to the brain that might result in very serious neurological damage, which can not be predicted by the preclinical analysis. Some of the patients treated have shown positive effects, but some others have poorly responded to the treatment. Also, some long-term studies suggest that these transplants might still result in the evolution of the disease together with secondary effects. Also, the transplant might originate cancerous cells, tumors, inadequate cell migration, immune rejection, bleeding during surgery, and post-surgical infection. Using stem cells for clinical use requires first an ensure that the treatment will result in a long-term improvement of motor function along with a relief of drug resistance symptoms in animals.
But the bigger problem relies on the origin of these cells. They must be obtained from embryo destruction before it reaches the uterus. This is very controversial and many people are against it due to the fact that it might involve abortion. The murder of a future person.
Answer:
it would be the procedure for trnsplatting the stem cell
Explanation:giving that it is a riskynoperation if not done with extreme cautions it could cause more damage than good
How could membrane fluidity be maintained in human cell membranes as the temperature decreases
Answer:
"At low temperatures it increases membrane fluidity by preventing fatty acid hydrocarbon chains from coming together and crystallizing."
Explanation:
PLZ HELP FOR BRANLIEST
Answer:
building and repairing cells
True or false: the food chain of land animals begins with the soil
Answer:
True
Explanation:
The primary producers are the first trophic level of the soil food web. Organisms in this trophic level are photosynthesizers, including plants, mosses, algae, lichens and photosynthetic bacteria. ... Primary consumers obtain energy by eating primary producers or the residues they produce.
Hope this helps :)
How is facilitated diffusion different from simple diffusion? a) facilitated diffusion requires the use of a transport protein and energy in the form of ATP b)facilitated diffusion and a simple diffusion both requires energy but facilitated diffusion uses a transport protein c)facilitated diffusion requires a transport protein d)Facilitated diffusion requires energy in the form of ATP
Answer:
a) facilitated diffusion requires the use of a transport protein and energy in the form of ATP
Explanation:
Diffusion is defined as the movement of substances from high to lower concentration across a potential gradient. Facilitated diffusion and simple diffusion are two different types of diffusion.
Simple diffusion does not require energy while facilitated diffusion requires energy in the form of ATP. Facilitated diffusion is a type of passive transport in which transport protein and energy is used in the form of ATP that allow the movement of substances across the cell membrane. There are majorly three types of proteins involved in facilitated diffusions such as channel proteins, carrier proteins, and gated channel proteins.
While in simple diffusion, pumps are used to move the substance across the membrane.
Hence, the correct answer is "a".
Answer:
a) facilitated diffusion requires the use of a transport protein and energy in the form of ATP
Explanation:
In simple diffusion, the molecules can pass only in the direction of concentration gradient. In facilitated diffusion, the molecules can pass both in direction and opposite of the concentration gradient. Simple diffusion permits the passage of only small and nonpolar molecules across the plasma membrane.
PLEASE HELP!!
Why is it important to revise models?
What would happen if models were NEVER revised?
Answer:
It's an important part of the writing process. Revising gives students an opportunity to reflect on what they've written. Revision is closely tied to critical reading; in order to revise a piece conceptually, students must be able to reflect on whether their message matches their writing goal.
Explanation: :)
Which of the following is the correct equation for PHOTOSYNTHESIS?
CO2 + O2 + H20 --> Light+ glucose
CO2 + glucose + H20 --> O2 + light
CO2 + light + H2O --> O2 + glucose
O 02 + light + H2O --> CO2 + glucose
Answer:
CO₂ + light + H₂O --> O₂ + glucose
General Formulas and Concepts:
Photosynthesis is for plants and they use water, carbon dioxide, and energy to make oxygen and sugar.
Explanation:
The general formula for photosynthesis is always:
6CO₂ (g) + 6H₂O (l) + light (energy) → C₆H₁₂O₆ (s) + 6O₂ (g)