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Answer: Q1. The primary function of the plasma membrane is to protect the cell from its surroundings. Composed of a phospholipid bilayer with embedded proteins, the plasma membrane is selectively permeable to ions and organic molecules and regulates the movement of substances in and out of cells.
Q2. The phospholipids in the cell membrane are arranged in two layers, called a phospholipid bilayer. Each phospholipid molecule has a head and two tails.
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Related Questions
Animals aresingle or multicellular?
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Answer:
Animals are multicellular
A nutrition facts label lists total fat as 10 grams and saturated fat as 4 grams. How many calories does fat provide?.
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90 calories is the amount of calories does the fat consisting of total fat as 10 grams and saturated fat as 4 grams.
One of the six nutrients your body requires to be healthy is fat. Calories are produced by proteins, lipids, and carbohydrates. Protein and carbohydrates both contain 4 calories per gram. There are 9 calories in 1 gram of fat.
Similar to a teaspoon or an inch, a calorie is a unit of measurement. Calories are the units of energy used by your body during food digestion and absorption. A meal might provide your body extra energy if it has more calories. Knowing that there are 9 calorie per 1 gram of fat:
Total calories = 10 grams of fat x (9 calories/1 gram of fat)
Total calories = 90 calories
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What aspect of agriculture has a negative effect on biodiversity and ecosystem stability?OA. Species evenessOB. MonocultureOC. EndemismOD. HotspotsReset SelectionDELL
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Monocultures have negative effects on the ecosystem mainly because they reduce biodiversity.
As there is only one plant species in agricultural crops, the species residing there are endangered because their usual habitat is destroyed and the organisms move to another area.
explain how the fluidity of the plasma membrane is maintained by the presence of unsaturated fatty acids and cholesterol. describe an adaptation used by organisms in cold environments to maintain a fluid membrane.
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Unsaturated fatty acids increase the fluidity of membrane and cholesterol brings stability to the cell membrane.
What is plasma membrane and how is it maintained by the presence of unsaturated fatty acids?Plasma membrane is the membrane outlines the cell separating the interior of the cell from the outside environment.Unsaturated fatty acids increases the fluidity of the plasma membrane and helps to maintain the fluidity for long.Likewise cholesterol have a great significance in the fluidity of the membrane too, as it brings stability.Plasma membrane is same as cell membrane , as it outlines the cell and is selective permeable.Cholesterol stabilizes the plasma membrane helps to maintain the fluidity.To know more about plasma membrane visit:
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Describe how molecules enter and leave a cell WITHOUT the use of energy.
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Answer: In simple diffusion, small noncharged molecules or lipid soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of high concentration to areas of low concentration (they move down their concentration gradient).
Explanation:
The moorish idol fish lives in coral reefs around the world. its oceanic environment is saltier than the environment inside its cells. the idol fish requires energy to maintain the environment in its cells. which structure in a moorish idol fish's cells produces the energy it needs?
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The shape of a Moorish idol fish's cells produces the strength it needs is mitochondria.
Moorish idols are pelagic spawners; this is, they launch eggs and sperm inside the water column, leaving fertilized eggs to drift away with the currents. Moorish idols, Zanclus cornutus, prefer flat reefs in depths between three m – 182 m and may be observed in both clear and murky subtropical glasses of water, including internal lagoons, and rocky and coral reefs.
Moorish idols will often choose at massive polypod stony corals and certain gentle coral polyps. despite the fact that this fish commonly eats coralline algae and sponges in nature, this does not imply that it might not choose different styles of sessile invertebrates, or perhaps even motile crustaceans.
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susan is a consultant for a grocery store chain that wants to open several new stores in the st. louis area. she has selected several sites for the company to consider based in part on projected population growth near those sites. what isolating mechanism does this best illustrate?
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The isolating mechanism which best illustrates Susan's consultancy is better expectations of future resource value.
Susan is making an investment in future value thus, the company can gain a competitive advantage by having better expectations of a resource's future value. A company can gain a long-term competitive advantage by consistently setting higher expectations over time.
Isolating mechanism: A steady stream of economic profits and the persistence of intra-industry firm differences over time are both explained by isolating mechanisms, which are also referred to as barriers to imitation (Mahoney and Pandian, 1992). Similar to entry barriers and mobility barriers, isolating mechanisms operate on different levels.
Barriers to imitation that prevent a company from competing are:
1. Better expectations of the value of future resources—investment in future value
2. Path dependence—the options faced are limited by past decisions;
3. Causal ambiguity—the cause and effect of a phenomenon are not readily apparent
4. Social complexity—the interaction of various social and business systems and
5. Intellectual property (IP) protection—a critical intangible resource that can serve as a powerful isolating mechanism. The main types are Trade secrets, designs, patents, copyrights, and trademarks.
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after electrophoresis dna fragments through an agarose gel, you examine the dna band that is closest to the positive electrode. how does this dna fragment compare to the others on the gel?
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This DNA fragment is smaller as compared to others.
In the field of science, gel electrophoresis can be described as a technique by which DNA fragments are separated based on their charge-to-mass ratio.
Those DNA fragments that are smaller will move faster as compared to the larger ones. This is because the charge on each DNA fragment will be the same but the smaller DNA fragments will be able to move faster.
Hence, the DNA band that is closest to the positive electrode will be able to travel faster as compared to others.
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The purpose of the Calvin Cycle is to…
A. convert sugar into cocoa puffs cereal that Mrs. Wade loves to eat
B. convert carbon dioxide in the atmosphere into carbohydrates or sugars
C. convert carbon dioxide in the atmosphere into pizza that Ms. Vetter likes to eat.
D. convert carbon dioxide into oxygen using water
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Answer: B.
Explanation:
Answer: B, the purpose of Calvin Cycle is to produce three carbon sugars.
Explanation:
you might think they are all a part of the same group if you observe a flock of birds flying overhead, one right after the other. but if they were all very far apart, you might only see individual birds flying separately. which gestalt concept is utilized in this distinction? group of answer choices
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According to the given statement Proximity gestalt concept is utilized in this distinction..
How do birds flock?His research demonstrated that birds do not simply follow a leader or their immediate neighborhood. Instead, they prepare for abrupt shifts in the flock's migration direction. And as the flock starts to change its course, he claimed, it "spreads across the flock in a wave."
Do birds swarm or flock?Thousands of these birds gather in captivating swarms, but it is still unclear why. The magnificent patterns that European starlings make in the sky cannot entirely be attributed to them being in defense against predators. The starling flocks in California form cordons, which are closely packed movements, when a falcon flies over the night sky.
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The principle of proximity, a Gestalt concept, is used in this differentiation. According to this theory, items that are near together are seen as a group, whereas those that are far apart are seen as individual beings. In the case of a flock of birds, their proximity provides a sense of oneness and causes us to perceive them as a group while they are flying close together. Yet, their proximity is diminished at a great distance, and we see the birds as individual birds flying apart. One of the Gestalt concepts that aid in the organization and comprehension of visual data is the idea of closeness.
more free energy is released during the krebs cycle than during glycolysis, but only 2 moles of atp is produced for each mole of glucose undergoing glycolysis. most of the remaining free energy that is produced during the krebs cycle is used to a) synthesize gtp. b) reduce nad and fad. c) release as heat. d) oxidize pyruvate.
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The Krebs cycle releases more free energy than glycolysis does, although only two moles of ATP are created for every mole of glucose that is glycolysis. Reducing nad and fad uses the majority of the free energy that is still created during the Krebs cycle.
What is meant by the Krebs cycle?The second crucial stage of oxidative phosphorylation is the Krebs Cycle, often known as the citric acid cycle. The Krebs cycle converts the energy from the smaller, 3-carbon glucose molecules produced by glycolysis into electron carriers, which are then utilized in the electron transport chain to create ATP.
The tricarboxylic acid (TCA) cycle, also known as the Krebs or citric acid cycle, is the main source of energy for cells and a crucial step in aerobic respiration. The cycle transforms the chemical energy of acetyl coenzyme A (acetyl CoA) into nicotinamide adenine dinucleotide's reducing force (NADH).
Therefore, the correct answer is option b) reduce nad and fad.
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which of the following is false regarding chemolithotrophic microorganisms? choose one: a. light absorption provides them with electrons. b. they include methanogens. c. they use inorganic compounds as electron donors. d. electron donors for respiration include fe2 , h2s, and nh 4.
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a)Light absorption provides them with electrons
Light absorption provides them with electrons is false regarding chemolithotrophic microorganisms
What qualities do ETS cofactors possess that help the ETS do its function?
They enable minor energy transfers when they are reduced and oxidized. Correct Feedback: Smaller energy transitions in an ETS are made possible by ETS cofactors, which maximizes the protons' ability to cross the membrane.
Glycolysis is a metabolic process that occurs during both fermentation and cellular respiration. Glycolysis is the first phase of respiration.
There exist phosphorylated sugars. A. Glucose is decreased when hydrogen atoms are added.
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When an experiment is repeated and the new results are different from the original results, what could you assume to be true?
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The original experiment may be inaccurate and further experimentation is needed.
The accuracy of measurements depends on the quality of the measuring equipment and the skill of the scientists involved. For the data to be considered reliable the variability of the values should be small. Repeated scientific research increases credibility. Results may change over the course of different studies or under different conditions.
It is therefore important that the experiment itself is reproducible. A reproducible experiment should but need not give the same results when performed by different people at different times and preferably under similar conditions. Repeating an experiment multiple times can help determine whether the data are random or normal. Avoid jumping to conclusions without sufficient evidence.
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One of the difficulties of Earth science is that
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Answer: A
Explanation:
Labeling the human Skeleton system and labeling nervous system
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Completed! Finnnnnnnnn
a population of mockingbirds has an annual per capita birth rate of 0.08 and an annual per capita death rate of 0.03. calculate an estimate of the population change for a population of 2,000 birds in one year. give your answer to the nearest whole number.
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The population change for a population of 2000 birds in one year is positive and The number of individuals added is 100
Births, deaths, and migration are the primary drivers of population change. The difference between live births and deaths is what is meant by "natural increase. "The difference between the number of people moving into a region and the number of people moving out is called "net migration."
As the annual per capita birth rate is 0.08 and the annual per capita death rate is 0.03, the final number of live individuals per capita will be
0.08-0.03 = 0.05
The total population is 2000, and the number of individuals added will be
0.05*2000= 100
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Frankie was selected as the commencement speaker for this year’s graduation and experiencing imposter syndrome. To help overcome their imposter syndrome, frankie begins to engage in positive self-talk. Before frankie practices the speech, they now say that they are an amazing speaker and have a lot of great ideas to share. What practice is frankie engaging to overcome imposter syndrome?.
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Impostor syndrome is a psychological condition in which a person feels like a fraud and that they are not as skilled as other people think they are.
What is imposter syndrome?Imposter syndrome, to put it simply, is the sensation of being a fraud in some aspect of your life, notwithstanding any success you may have had there.
There is no recognized medical diagnosis for imposter syndrome. Instead, the phrase is most often used to refer specifically to achievement and intelligence, while it also has associations with social environment and perfectionism. In the 1970s, psychologists Suzanna Imes and Pauline Rose Clance coined this phrase.
Therefore, Impostor syndrome is a psychological condition in which a person feels like a fraud and that they are not as skilled as other people think they are.
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the value of psi in root tissue of a plant has been found to be 4.6 bars. if you place this root tissue in a 0.2m sucrose solution at 20 c in an open beaker. what is the psi of the solution? which direction will the net flow of water be?
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Water potential is calculated using the formula = S + P. The relationship between osmotic potential and solute concentration is direct. The likelihood that water in a solution may undergo osmosis reduces as a solution's solute concentration rises.
What is the potential of water?Water potential is higher in pure water. Purified water's water potential has traditionally been set at zero. This implies that any solution's water potential will always be negative.
The value of base water potential begins to decline at a temperature increase of 5 to 20 °C, whereas base water potential begins to grow at a temperature increase of 20 to 40 °C.
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Biologists conclude that sardine fish form tight clusters
called "bait balls, such as the one shown in the image,
because this behavior protects them from predators.
8
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Answer:
that's cool
never knew
Anyways thanks
The statement; "Biologists conclude that sardine fish form tight clusters called "bait balls, such as the one shown in the image, because this behavior protects them from predators." is true
What are the predators?Bait ball behavior is not limited to sardines; other small schooling fish, such as herring, anchovies, and mackerel, also exhibit similar clustering behaviors for similar protective reasons. The formation of bait balls is a remarkable example of collective behavior in the animal kingdom and serves as a vital survival strategy for these small fish species.
Biologists have observed that sardine fish (and other small schooling fish) form tight clusters known as "bait balls" as a defense mechanism against predators.
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Missing parts;
Biologists conclude that sardine fish form tight clusters
called "bait balls, such as the one shown in the image,
because this behavior protects them from predators.
T/F
what medical technology have some chinese chosen to pursue in order to increase the possibility of multiple children in a single pregnancy
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The use of fertility drugs is the technology used by some Chinese that can increase the possibility of multiple children in a single pregnancy.
Fertility drugs are the medications that serve various functions like production of eggs or sperms, or their quality. Some drugs can speed up the growth and maturity of egg cells, resulting in the release of more than one egg cell at the same time. This is how multiple children are born from a single pregnancy.
Pregnancy is the stage when the fusion of the male and female gamete happens and the fetus develops inside the body of the mother. For humans, this time period is of 9 months.
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genetic information of plants, animals, bacteria and many viruses is stored in deoxyribonucleic acid polymers (dna). the backbone of the polymer is a made up of the phosphorylated carbohydrate ribose with one less oh group on it. based on what you know about amino acid properties and the charge of phosphates at physiological ph what amino acids would be best at binding dna? group of answer choices positively charged ones like k and r negatively charged ones like d and e uncharged polar ones like t and c nonpolar ones like a and g
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Amino acids best at binding DNA are positively charged ones like k and r as DNA is negatively charged which will bind more effectively with positively charged amino acids.
Amino acids are natural compounds that contain both amino and carboxylic corrosive useful bunches.
Even though hundreds of amino acids exist in nature, by distance, the foremost critical are the alpha-amino acids, which include proteins. As it were 22 alpha amino acids show up within the hereditary code.
Lysine and arginine are essential amino acids since their side chain bunch contains a full positive charge at the physiological ph. Histidine is additionally considered essential, but it can have a positive or an impartial charge on its side chain gathered at the physiological ph.
Among the 20 common amino acids, five have a side chain that can be charged. At pH=7, two are negatively charged: aspartic corrosive (Asp, D) and glutamic corrosive, and three are positively charged: lysine, arginine, and histidine (His, H) (fundamental side chains).
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In the gluteus maximus, each motor unit controls a _____________ amount of muscle fibers than a motor unit in the eye muscles.
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In the gluteus maximus, each motor unit controls a greater amount of muscle fibers than a motor unit in the eye muscles.
The primary hip extensor muscle is the gluteus maximus. It is the largest of the three gluteal muscles which determines the shape of the hips. Eyes need to move with precision and with a high level of control, which is made possible by the fact that there are fewer muscle fibers connected to each neuron. This is the reason why motor unit in gluteus maximus controls a greater amount of muscle fibres than the eye.
Smaller, lower threshold motor neurons in the muscle's small motor units will be more excitable and will fire first to their skeletal muscle fibers, which also tend to be the smallest. This is how eyes work efficiently. On the other hand, limbs requires greater amount of movement and thus have a larger muscle.
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the vo2max provides a quantitative measure of a person's capacity for . . . group of answer choices anaerobic glycolysis aerobic atp resynthesis maximum lactate production none of the above
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The correct answer is Aerobic ATP resynthesis.
What is vo2max ?
vo2max is the measurement of maximum amount of oxygen our body uses during exercises. Here, v represents volume, o2 is oxygen and max represents maximum.
What is Aerobic ATP resynythesis ?
It is the process of converting energy into Adenosine Triphosphate(ATP) by using oxygen present in blood. It occurs in mitochondria.
Therefore, vo2max provides a quantitative measure of a person's capacity for Aerobic ATP resynythesis.
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transform this table into a histogram
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Answer:
Sep 21, 2020
7 key moments in this video
From 00:40
Decide on bin limits
From 01:56
Entering Bin Limits
From 02:21
Generate the frequency table
From 03:13
Review the frequency table
From 05:27
Add Axes titles
From 05:49
How to make the bars in the chart thic
Explanation:
most aec consoles permit activation of a. all three cells simultaneously. b. all three cells in any combination. c. the outer cells when the center cell is inactivated. d. the center cell and either outer cell.
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Most AEC (Automatic Exposure Control) consoles permit activation of (b) all three cells in any combination.
An Automatic Exposure Control (AEC) console is a tool that is found on most of the advanced radiographic units. It helps the radiographer in ascertaining the radiation exposure (in terms of quantity) in order to create a quality image.
An AEC console is deployed to regulate invariably the quantity of radiation approaching the image receptors by terminating the length of exposure. Automatic Exposure Control (AEC) consoles are also known as automatic exposure devices. These consoles are exceptionally good at producing persistent levels of exposure if utilized accordingly.
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Help me with number 3!!!!!!!!!!!! Please
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Answer: (D)
Explanation: All planets have circular orbits around the Sun. Comets have elliptical orbit.
Answer this question and ill mark
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Answer: D. Data demonstrating a relationship between the amount of sun exposure and incidences of skin cancer.
Explanation:
Going through the other answers,
A doesn't seem logical as it only shows the location of DNA in a cell, which has nothing to do with inferencing the sun.
B also doesn't make sense since corelation[tex]\neq[/tex]causation. Just because someone had sunburns as a child doesn't mean they'll develop skin cancer.
C is also not the answer because many companies advocate that their products protect skin against UV rays, however Ultra-Violet radiation from the sun is hard to defend against.
Therefore, the answer is D since the amount of Sun exposure is usually a direct cause of skin cancer.
A student is performing a chemical analysis of xylem sap. This student should not expect to find much _____.
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A student is performing a chemical analysis of xylem sap. This student should not expect to find much sugar.
The plants contain two vascular bundles which are referred to as the phloem vascular bundle and the xylem vascular bundle. The xylem and the phloem flow across a plant.
The phloem is the vascular bundle that is responsible for the transportation of food from the leaves to all other parts of the plant.
The xylem is the vascular bundle that is responsible for the transportation of water from the roots to all the parts of the plant.
Hence, the food 'sugar' will not be found in the xylem sap as it will contain water. Sugar will be found in the phloem.
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Define and give an example of : a. Genotype: b. Homozygous c. Heterozygous d. Phenotype
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a) Genotype: The genetic composition of an organism is its genotype. The alleles or variations that an individual carries in a specific gene or genetic region are also referred to as the genotype.
Eg: RR,Rr,rr can be the genotype of the color of a flower.
b) Homozygous: It is a gene region where there are two identical alleles present. Two alleles with the same variation or two alleles that are normal can both be present in a homozygous genotype
Eg: BB is the homozygous gene for a dominant character like brown eyes in humans.
c) Heterozygous: It is a gene region where there are two distinct alleles present. One normal allele and one mutated allele, or two distinct mutated alleles, can make up a heterozygous genotype.
Eg: Bb is the heterozygous gene for brown eyes in humans.
d) Phenotype: It describes a person's observable characteristics. Both a person's genomic makeup (genotype) and environmental circumstances affect their phenotype.
Example: Color of human eyes like brown, blue, black
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interrupting the night with a flash of light can trigger flowering in a long-day plant. why doesn't introducing a short period of darkness during the day cause a short-day plant to flower?
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