Answers
All eukaryotic cells contain mitochondria, which are tiny organelles bound by membranes and responsible for producing the majority of the chemical energy needed to drive metabolic reactions inside the cell.
The ATP molecule that is created stores this chemical energy. By oxidising pyruvate during the cytoplasmic process of glycolysis, respiration in the mitochondria uses oxygen to produce ATP in the Krebs' or Citric acid cycle. The protons move or re-enter the matrix through the enzyme ATP synthase, which produces the energy storage molecules of ATP from the reduction of ADP, creating a gradient where there is a differential in the quantity of protons on each side of the membrane. Three molecules are present at the end of the electron transfer.
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Related Questions
A variable is something that can be changed in an experiment. Look on the SIMULATION pane.
What are the three variables you can change in your laboratory?
Predict: Which of these variables do you think will have the greatest effect on the aliens? Why?
Get the Gizmo ready:
Click Reset.
Select the BAR CHART tab.
Turn on Show numerical values.
Observe: Change the Light to 0 hours/day, the Water to 1 drops/hr, and the Temperature to 0 °C.
Click Play, and observe the aliens until the numbers are stable. Click Pause.
1. How many of each type of alien are there now?
.
.
O Thin: 50 Medium: 25 Thick: 25
O Thin: 0 Medium: 80 Thick: 20
O Thin: 2 Medium: 8 Thick: 90
O Thin: 20 Medium: 80 Thick: 0
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An experiment usually has three kinds of variables: independent, dependent, and controlled. The independent variable is the one that is changed by the scientist.
What do you mean by independent variable?It is a variable that stands alone and isn't changed by the other variables you are trying to measure. For example, someone's age might be an independent variable. Other factors (such as what they eat, how much they go to school, how much television they watch).
For example, if you are measuring how the amount of sunlight affects the growth of a type of plant, the independent variable is the amount of sunlight.
An easy way to think of independent and dependent variables is, when you're conducting an experiment, the independent variable is what you change, and the dependent variable is what changes because of that.
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Which of those ancient populations is the most likely to have contributed significantly to the bottleneck effect in the YDNA variation observed across much of Eurasia?
1. Yamnaya
2. Denisovans
3. Basal Eurasians
4. Ancient North Eurasians
5. Gravettians
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Answer:
The correct answer is "Yamnaya".
Explanation:
In genetics, a population or genetic bottleneck is defined as a reduction on the size of a population as a result of an environmental effect or human intervention. Regarding the Y chromosome bottleneck, the Yamnaya is an ancient population that contributed the most due to its sex-biased and stratified culture. The Yamnaya were violent and left behind many male skeletons, where just few type of persons were able to reproduce.
Which statement accurately describes chemical sedimentary rock?
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The helper T cell is active when....
It has engulfed a pathogen
It has learned the shape of the antigen
It has made the MHC protein
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T cells undergo a clonal expansion and differentiation followed by a contraction phase, once the pathogen has been cleared.
How does the T cell respond to a pathogen?Recent in vitro and in vivo evidence supports an antigen-pre-senting role for T cells. Human T cells exhibit major histocompatibility complex (MHC) class II antigens and adhesion molecules that are typical of antigen-presenting cells (APCs).
Controlling the populations of effector, memory, and naive T lymphocytes depends on cell survival and death. The presence of MHC proteins in the antigen-presenting cell is necessary for the identification process because they bind to these fragments, transport them to the cell surface, and present them to the T cells there together with a co-stimulatory signal.
Due to their dual specificity, T cells can distinguish between peptide antigens presented by self-MHC I or MHC II molecules and those presented by other MHC molecules.
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Please help fast i really need this answer hurry
Answers
Answer:
c) Convection zone.
Explanation:
The electro-magnetic radiations form in the convection zone, which is the outermost layer of the solar interior. Temperatures in this region are cool enough that the atoms have enough energy to hold their electrons. This makes the convection zone darker or more opaque, trapping heat and causing the plasma appear to boil from convection.
Answer:
Radiative Zone
Explanation:
Radiation
Which of the following mechanisms best explains how chronic inflammation can cause systemic (whole body) effects?
A. Chronic inflammation causes release of cytokines which can alter brain signaling
B. Chronic inflammation does not cause systemic effects
C. Chronic inflammation causes cell death which has systemic effects
D. Chronic inflammation causes vasoconstriction which decreases blood flow and results in decreased production of cellular energy (ATP)
A. Chronic inflammation causes release of cytokines which can alter brain signaling
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The release of cytokines by chronic inflammation can change brain signaling. The answer is Option (a).
Chronic inflammation develops when acute inflammatory mechanisms fail to heal tissue damage, and it can cause a variety of illnesses include cancer, atherosclerosis, type 2 diabetes, rheumatoid arthritis, and cardiovascular conditions. The following are the most typical causes of chronic inflammation: illnesses where your body assaults good tissue.
Immune responses that manifest in the brain in a variety of ways can be brought on by systemic inflammation. People may develop cognitive symptoms like confusion or memory loss. Other typical signs, or "illness behavior," could be: Depression. Chronic inflammation eventually causes your body's inflammatory response to start harming healthy cells, tissues, and organs. This can eventually result in internal scarring, tissue loss, and DNA damage.
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In what main way is a unicellular organism different than a multicellular organism?
Answers
Answer:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function.
Explanation:
For which of these questions could a testable hypothesis be developed? Check all that apply.
Does the width of a rubber band affect how far it will stretch?
How does the thickness of a material affect insulation?
Which of Nikola Tesla's inventions was the coolest?
Do all objects fall to the ground at the same speed?
Which laboratory experiment is the most fun?
Answers
The following are the questions in which a testable hypothesis be developed:
Does the width of a rubber band affect how far it will stretch?How does the thickness of a material affect insulation?Do all objects fall to the ground at the same speed?Thus, the correct options are 1, 2, and 4.
What is Hypothesis?A hypothesis may be defined as a proclamation or group of information which is mandated to be experimented with using an investigation procedure.
The width of the rubber is a variable quantity that can be measured, observed, and recorded in the conclusion. Similarly, the thickness of the material is also varied with respect to certain terms and conditions, and hence can be measured observed, and recorded in the experimental data.
Therefore, it is well described above.
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Answer:
person on top is right its 1 2 and 4
Explanation:
How does exhaling remove waste from the body? Explain the systems that make this happen, using complete sentences.
Answers
Exhaling removes waste from the body by expelling carbon dioxide through the respiratory system.
Exhaling plays a crucial role in removing waste from the body, particularly in the form of carbon dioxide (CO2), a byproduct of cellular respiration. The respiratory system, composed of the lungs and airways, is primarily responsible for this process.During inhalation, air containing oxygen is drawn into the lungs through the nose or mouth. Oxygen then diffuses across the lung tissue into the bloodstream, where it binds to hemoglobin and is transported to cells throughout the body. In the cells, oxygen is utilized in metabolic processes, generating energy and producing CO2 as a waste product.When we exhale, the diaphragm and intercostal muscles relax, causing the volume of the chest cavity to decrease. This action increases the pressure within the lungs, and air rich in CO2 is expelled from the body through the airways. The CO2 is removed from the bloodstream and eliminated from the body, reducing the waste buildup.Overall, the respiratory system's main function is to facilitate the exchange of gases, allowing oxygen to enter the body and carbon dioxide to be eliminated. Exhalation plays a vital role in removing waste by expelling CO2 and maintaining a balanced gas composition within the body.For more questions on respiratory
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difference between trychocysts and nematocysts
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Answer:
trichocyst is a threadlike organ in certain protozoans that can be discharged suddenly in order to grasp or sting while nematocyst is (biology) a capsule, in certain cnidarians, containing a barbed, threadlike tube that delivers a paralyzing sting.
Explanation:
Iron oxide reacts with aluminum to give aluminum oxide and iron. What kind of chemical reaction is this?
Answers
Answer: Replacement Reaction
Is the stalk that emerges from the green "leaf like" tissue gametophyte or sporophyte?
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Which is the best example of a eukaryote?
Answers
Answer:
A
Explanation:
Eukaryotic cells have the nucleus enclosed within the nuclear membrane.
The cell has mitochondria.
Flagella and cilia are the locomotory organs in a eukaryotic cell.
A cell wall is the outermost layer of the eukaryotic cells.
The cells divide by a process called mitosis.
Where is all the genetic information in a cell
Answers
Trackers uses 9000 meters in 30 minutes on a average how many meter trackers track each minute
Answers
Answer: it is 300
Explanation:
Do plants take in air with their roots?
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Answer:
No
Explanation:
No, plants do not take in air with their roots. Roots are designed to absorb water and minerals from the soil. In order to get the air and carbon dioxide they need for photosynthesis, plants have specialized structures called stomata in their leaves and stems that allow air to enter and exit. These stomata regulate the movement of gases into and out of the plant, so the plant can take in the carbon dioxide it needs and release the oxygen it produces.
What are some components that makeup lipid envelopes on viruses?
Answers
Answer:
Some of the components that make up lipid envelopes on viruses include:
Phospholipids: The main component of the lipid bilayer in the viral envelope is phospholipids, which are made up of a hydrophilic (water-loving) head and a hydrophobic (water-fearing) tail.Proteins: Viral envelope proteins are embedded in the lipid bilayer and help the virus to interact with host cells, infect them, and evade the immune system.Glycoproteins: Some viruses have glycoproteins on their envelope allowing them to bind to specific receptors on host cells and initiate infection.Cholesterol: Some viruses incorporate cholesterol into their envelope to help stabilize the lipid bilayer.Lipid rafts: These are specialized regions within the lipid bilayer containing high concentrations of cholesterol and glycolipids. Lipid rafts facilitate viral entry into host cells by concentrating viral envelope proteins in a specific region.Other lipids: Viral envelopes may also contain other lipids, such as sphingolipids and gangliosides, which influence the interaction between the virus and host cells.The composition of viral envelopes can vary depending on the type of virus. These components determine the virus ability to infect host cells, evade the immune system, and replicate within the host.
Explanation:
How might a differentiated cells shape help it perform a specific job within a multicellular organism ??
Answers
A differentiated cell's shape may help to perform a specific job within a multicellular organism because this process is associated with cell specialization and differentiation.
What are cell specialization and differentiation?Cell specialization and differentiation are physiologic processes associated with differential gene expression which are required to produce specific cells that carry out different tasks such as red blood cells that transport oxygen in the blood.
Therefore, with this data, we can see that cell specialization and differentiation are fundamental because they ensure different cells carry out different works in a multicellular organism.
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Which of the following are phases of the cell cycle?
SELECT ALL THAT APPLY
a the synthesis phase
b the first growth phase
c termination phase
d the mitotic phase
Answers
Answer: SELECT ALL THAT APPLY a the synthesis phase b the first growth phase c termination phase d the mitotic phase.
Explanation:
What if the surface of a bacteria cell was not very antigenic? What would this mean for the host
Answers
If the surface of a bacteria cell was not very antigenic then it can enter host cells and eventually cause harm.
What is an antigen?An antigen is any molecular structure present in a pathogenic organism (e.g., bacteria) that can be detected by the immune system.
Antigens usually bind to antibodies that are able to bind specific antigenic features and thus trigger a concomitant immune response.
In conclusion, if a bacteria cell was not very antigenic then it can cause harm.
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The information in DNA in the nucleus is used to produce
Answers
Answer:
Proteins
Explanation:
DNA courses can be turned into messages that can be used to make proteins
explain two situations on a pedigree that would allow you to determine the genotype of an individual with the dominant phenotype
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1) If the individual with the dominant phenotype has a parent with the recessive phenotype, the genotype of the individual is heterozygous (Aa).
2) If the individual with the dominant phenotype has offspring with the recessive phenotype, the individual must be heterozygous (Aa).
The two situations on a pedigree that would allow you to determine the genotype of an individual with the dominant phenotype.
Situation 1: Identify the individual with the dominant phenotype (let's call them Individual A).Look for the parents of Individual A.
If one of the parents has the recessive phenotype (aa) and the other parent has the dominant phenotype (AA or Aa), then Individual A must be heterozygous (Aa). This is because the dominant phenotype is only expressed when at least one dominant allele is present.Situation 2: Identify the individual with the dominant phenotype (Individual B).
Observe the offspring of Individual B.
If Individual B has offspring with the recessive phenotype (aa), it means that Individual B must be heterozygous (Aa). This is because to have offspring with the recessive phenotype, both parents must contribute a recessive allele.
By analyzing the presence of the recessive phenotype in the parents or offspring of an individual with the dominant phenotype, we can determine their genotype as heterozygous (Aa).
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5. Two types of prokaryotic cells can be distinguished: bacteria and archaea. How do these cells differ from each other? Compare their cell wall structure, patterns of cytoplasmic membranes and ribosomal entities and 16S-rRNA?
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The differences between bacteria and archaea include the following below:
Bacterial cell walls are composed of peptidoglycan while archaeal cell walls are composed of polysaccharides. Bacteria contain fatty acids on the cell membrane, whereas archaea contain phytanyl.Their ribosomal entities and 16S-rRNA is similar such that they contain three ribonucleic acid (RNA) molecules, 16S, 23S and 5S rRNA.What is Bacteria?This is a mostly free-living organism which often consisting of one biological cell and lacks a defined nucleus.It is usually microscopic in nature and causes different types of diseases.
The cell wall structure of bacteria and archaea are different such that bacterial cell walls are composed of peptidoglycan while archaeal cell walls are composed of polysaccharides and other listed points above.
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If an organism required stable water temperatures and extreme pressure in order to survive, what zones would it most likely be found in, and why?
Answers
Answer:
Probably a hydrothermal vent.
Explanation:
Hydrothermal vents are regions where superheated water is released through a fissure and are often near volcanically active locations. These are pretty stable in temperature (although the range of their average temperature is quite large) and include extremely pressurized environments.
Which statement best explains how the cell membrane helps a cell remove waste? A. Carbon dioxide molecules pass out of the cell through the layer of phospholipids
Answers
why bone grow in bidirectional
Answers
Explanation:
Bones grow in different directions because they need to support the body in different ways. The different directions allow for flexibility and strength.
ASAP can someone help me with this will mark you brainliest
1. What properties of water cause the water to rise in a straw or capillary tube?
a. Solubility B. surface tension C. capillary action
Answers
Answer: C, capillary action.
Explanation:
A straw works because when you suck the air out of the straw, it creates a vacuum. This causes a decrease in air pressure on the inside of the straw. Since the atmospheric pressure is greater on the outside of the straw, liquid is forced into and up the straw and into your mouth.
PLEASE HELP ME
What roles do photosynthesis and respiration play in
the distribution of gases in seawater?
Answers
2.) Seawater has many different gases dissolved in it, especially nitrogen, oxygen and carbon dioxide. It exchanges these gases with the atmosphere to keep a balance between the ocean and the atmosphere. This exchange is helped by the mixing of the surface by wind and waves. :)))
please please help ! The results of gel electrophoresis are shown below, with four different
strands of DNA labeled.
electrode
II
Il kolle
The
Which strand of DNA is the shortest?
O A. 1
O B. 3
C. 2
O D. 4
Answers
Answer:
1
Explanation:
<3
The strand of DNA which is the shortest is 1 and is denoted as option A in this scenario.
What is DNA?This is referred to as deoxyribonucleic acid and contains the genetic components in organisms.
From the chart we can deduce that the shortest strand and most appropriate choice is 1.
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To support the claim that the consumption of natural resources by humans has a negative impact on the environment, what kinds of fats would be needed to provide evidence?
Answers
Evidence such as data on air and water pollution, land degradation, species extinction, and greenhouse gas emissions would be needed.
Why natural resources is important?
Natural resources are essential for our survival and economic development. They provide us with the raw materials to make the products and services that we need to sustain our lives. They are also essential for our environment, providing us with clean air, fresh water, and food sources. Natural resources are also necessary to maintain ecological balance and biodiversity, which are needed to support healthy ecosystems and the services they provide.
1. Data showing the amount of natural resources extracted and consumed by humans.
2. Studies on the effects of resource extraction and consumption on the environment, including air and water quality, soil erosion, and biodiversity.
3. Data comparing the environmental impacts of resource extraction and consumption to those of renewable energy sources.
4. Reports from independent organizations evaluating the social and economic costs of resource extraction and consumption.
5. Research on how resource extraction and consumption contribute to climate change and other global environmental issues.
Therefore, data on air and water pollution, land degradation, species extinction, and greenhouse gas emissions would be needed.
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