Answer:
B. Citric acid is added to the solution, but the pH of the solution does not change.
Explanation:
In chemistry, buffer solutions or simply called Buffer are solutions that resist a change in pH when an acid or base is added to them i.e they maintain a constant pH. This is as a result of the content of the solution. A buffer may contain a weak acid and its conjugate base (salt) or a weak base and its conjugate acid.
Hence, when a strong base or acid is added to them, they still restore the original pH of the solution due to the reaction that removes or neutralizes the hydrogen or hydroxide ions from the acid and base added to them respectively. This is what happens when Citric acid is added to the solution, but the pH of the solution does not change.
Citric acid, which is an acid, does not practically increase or decrease the pH of the solution. Hence, the solution is called a buffer.
Answer:
Citric acid is added to the solution, but the pH of the solution does not change.
Explanation:
Got it right on Apex
Hope I helped! :)
CER
Can someone help me with these questions? Thank you.
Answer:
1.C
2.E
3.C
4.R
5.E
6.R
7.E
8.C
9.E
(do not take my word for it maybe wait for someone else to answer to compare to mine)
A person is dehydration and they start to bleed from their nose. But they're bleeding from only one nostril. Why?
The lining of your nose contains many tiny blood vessels that lie close to the surface and are easily damaged.
The two most common causes of nosebleeds are:
Dry air — when your nasal membranes dry out, they're more susceptible to bleeding and infections
Nose picking
Which plant cells might not contain any chloroplasts?
Answer:
roots
Explanation:
please mark as brainliest :)
2. Explain the factors that led Wilson to the idea of (a) studying small islets, (b) fumigating them, and (c) observing the recolonization of species.
Answer and Explanation:
The ecologists MacArthur and Wilson took the term island biogeography theory to refer to the predictions about the number of species that could be inhabiting on an island.
Island biogeography theory establishes that the two factors that affect species richness in natural communities on an island are the distance from the mainland and the size of the island.
At the same time, these factors affect inmigration and extinction rates. According to the theory, islands that are closer to the continent have higher possibilities of receiving immigrants than those islands that are located farther from the mainland. This is the effect of distance.
The effect of size is reflected in the relation between island size and species diversity. In smaller islands, the probability of extinction is higher than in bigger islands. Bigger islands can have more species than smaller ones.
In the case of two islands of the same size and different distance to the mainland, both of them will have the same extinction rate, but the one closer to the continent will have a higher immigration rate, and so, a higher amount of species. The S value will be higher on the island closer to the continent.
Experiment:
To prove that the observations about the species richness and its relation to island size and distance to the continent were not a casualty, manipulation experiments were developed. These experiments helped to prove how the colonization process take place from cero. To observe the entire process of ecological succession and the tendencies proposed by the island biogeography theory Wilson and Simberloff (1970) eliminated the fauna on some islands to observe how they were recolonized from the continent. They fumigated the mangler island and studied these islands to account for the variation in arthropod richness over time. They studied many islands classified by distance. On each island, the richness increased at different rates. The island closest to the continent received more immigrants and is colonized faster than the other ones, reaching its original richness faster. The farthest island was recolonized but at a much lower rate and it does not reach equilibrium while the study was going on. Although, it was expected to reach equilibrium with time.
Proteins are composed of which of these subunits?
Answer:
Proteins are polymers; the monomers which make them up are amino acids.
Hope this helped!!!
Why is the top part of Mt.Everest the coldest part if the sun is practically shining above it?
Answer:
As air rises, the pressure decreases. It is this lower pressure at higher altitudes that causes the temperature to be colder on top of a mountain than at sea level.
Answer:
Hey there!
The sun is so far away, it has little effect on the temperature at different elevations. Also, Mt. Everest's top is very high in altitude, and higher altitudes have cooler temperatures.
Let me know if this helps :)
What is an example of medicines whose molecular structure has been designed to interact with specific target molecules in living things?
Answer: G protein- coupled receptor
Explanation:
Drug target is when a native protein activity in the body is modified by a drug resulting in a desired therapeutic effect.
G protein is an example of target drug that has been deisgned to modified the affect of certain protein in the body to aid treatment.
The first thing is to Identify the biological origin of the disease and then the target that can be used to combat the Ailment.
Neuron A communicates with neuron B. The ________ of neuron A releases a signal that activates a(n) ________ of neuron B.
Answer:
Axon terminal ; dendrite
Hope this answer correct :)
Neuron A communicates with neuron B, and the axon terminal of neuron A releases a signal that activates the receptors present on neuron B. The neurotransmitters are attached to the ligand-gated channel on neuron B.
What is nerve impulse transmission?The nerve impulse transmission takes place between two neurons, and then in this way, from the sensory organs, the message passes to the spinal cord and the brain. The synapse is formed between the two neurons, such as the presynaptic neuron that releases the neurotransmitters, and this activates the ligand-gated channel of the postsynaptic neuron. Due to this interaction, the neurons get excited and activated.
Hence, neuron A communicates with neuron B, and the axon terminal of neuron A releases a signal that activates the receptors present on neuron B. The neurotransmitters are attached to the ligand-gated channel on neuron B.
Learn more about nerve impulse transmission here.
https://brainly.com/question/28189483
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Describe five of these properties and provide an example of each: Hydrogen bonding, cohesion and adhesion, surface tension, heat of vaporization, specific heat, density, and universal solvent
Answer:
Explanation:
Hydrogen bond is an intermolecular force of attraction, it occur between a proton in a molecule and an electronegative atom in the another. It is weak bond and can be found in water molecule.
Cohesion is force of attraction thst occur when molecules are attracted to other molecules of the same type
this can be found in hydrogen bonding.
Adhesion occur when molecules are attracted to different substances. It can be founf in water when reaction with other substance
A universe solvent is a substance that is used to dissolves many substance. Example is water it can be used in dissolving many substance.
Surface tension is the ability of a liquid surfaces to reduce into the minimum surface area. It allows some insect that are less dense to float in water
Head of vapourization is the amount of heat required to change a liquid into a vapor. Heat to convert water into vapour
Answer:
pH
Explanation:
"The pH of a solution is a measure of the molar concentration of hydrogen ions in the solution and as such is a measure of the acidity or basicity of the solution. The letters pH stand for 'power of hydrogen' and numerical value for pH is just the negative of the power of 10 of the molar concentration of H+ ions."
hope this helps :)
A Mesopotâmia e o Egito antigo foram as primeiras culturas que desenvolveram métodos de irrigação. Um dos métodos eram os canais, mas quando não funcionavam, os egípcios precisavam inventar ferramentas para bombear água do Nilo e de outras fontes. E dessa forma, desenvolveram o sistema de canais. Os governantes egípcios colocaram uma enorme importância no sistema de canais do país e os governantes regionais foram responsáveis pela escavação e reparação das estruturas. Os canais usavam a água do Nilo quando o rio estava na época da cheia e inundava algumas terras... Podemos dizer que antes mesmo dos egípcios, os equinodermos tinham o mais complexo sistema de distribuição de água por pressão do mundo. Você concorda com essa afirmação? Justifique usando informações que você aprendeu durante a aula do equinodermos.
Answer:
ffffffffggggggggggbhgggggghhhhhhgffghgfffddñbgggggggggggggggggddrryyyygfreeeeeerrrrrrrdfbbbbhhhgggggghhyyyggggyyyyyygggttggggggyyygggygbbbggggghhhhyyhhhyyyyuyuuuuuuyybggggggggggggtttfggf
Explanation:
vvfdd
Please if you can, please help..
What is an allele that isn't expressed called?
Dominant allele
Recessive allele
Genotype
Phenotype
The final phase of translation, called termination, is signaled by three nucleotides, called a __________, that mark the end of a polypeptide chain.
Plasmid
Exon
Intron
Stop codon
please please help!!
Answer:
Carrying capacity was reached due to the abundance of prey
The gallbladder is most accurately described as:________ A. The source of urea B. The storage site for fat and minerals C. The duct that drains the tail of the pancreas D. A distensible sack that concentrates and stores bile
Answer:
D. a distensible sack that concentrates and stores bile
Explanation:
The gallbladder is a small pouch that sits just under the liver and stores bile that is secreted from the liver until it is released into the intestines.
Hope that helps.
Which statements accurately describe the roles of water on earth
Answer:
C.
Explanation:
It carries cold water from the equator to the poles
12. What group of organisms are most in danger of extinction?
those with small populations
both a and b
those with large populations that breed quickly
those that migrate or need special habitats
Answer:
Both A and B
Explanation:
which of the following is not irrational number?
(1)√2
(2)2/√6
(3)√36/1296
(4)-√6+6
Explanation:
hi !!
here i think all areirrational expect root 36/1296,
1. root 2= root 2= 1.414213562
2. 2/root 6= root 6 /3 = 0.8164965809
3. root 36/1296=1/6=1.66666667
4. - root 6+6= -2 root 3 = -3.464101615
so, they are extended and dont have exact value so all are irrational expect no. 3 because it can be expressed in 1/6 fraction form but others will come on root form.
Hope it helps...
Answer:
[tex]\frac{\sqrt{36} }{1296}[/tex]
Explanation:
[tex]\sf A \ rational \ number \ can \ be \ expressed \ as \ a \ quotient \ of \ two \ whole \ integers.[/tex]
[tex]\sqrt{2} = 1.41421356237...[/tex]
[tex]\frac{2}{\sqrt{6} } = 0.816497...[/tex]
[tex]\frac{\sqrt{36} }{1296} =\frac{6}{1296} =\frac{1}{216}[/tex]
[tex]-\sqrt{6} +6= 3.55051...[/tex]
[tex]\sf The \ rational \ number \ from \ the \ list \ is \ \frac{\sqrt{36} }{1296}[/tex]
What is a protein that is the main component of the thick filaments in muscle fibers and is responsible for muscle contraction?
Answer:
Myosin
Explanation:
Two of the important proteins are myosin, which forms the thick filament, and actin, which forms the thin filament. Myosin has a long, fibrous tail and a globular head, which binds to actin. The myosin head also binds to ATP, which is the source of energy for muscle movement
Answer: actin
Explanation:
WHAT ARE THE OUTSIDE RAW MATERIALS USED BY PLANTS FOR PHOTOSYNTHESIS
As human travel increases, the number of introduced species likely
decreases.
increases
stays the same
is eliminated
Answer: The correct answer to the question is option B
INCREASES.
As human travel increases(As humans move from one place to another),the number of introduced species likely increases because as humans move from one place to another,they introduce new species of organisms to their new environment.
These non-native species grow in this new environment,becomes economically important and doesn't pose any harm to their new ecosystem unlike invasive species that poses a substantial harm.
The number of introduced species are likely to : ( B ) Increases
As Humans migrate from one place to another they introduce new species into their new environment naturally or artificially.
MigrationThe movement of humans or any type of organism comes with the introduction of new species because as they move they take along with them certain species that naturally do not belong to their new environment.
Hence we can conclude that As human travels The number of introduced species are likely to Increase.
Learn more about Human migration : https://brainly.com/question/1213023
Object is not moving Answer 1 Choose... Object is moving towards observer Answer 2 Choose... Object is moving away from observer Answer 3 Choose...
Answer:
Object is moving away from observer.
Explanation:
If a force is applied to an object it starts moving. The object will move towards the observer, this is known as Doppler effect. It is when an observer or the thing under observation moves. There is change in its position due to a force exerted on it. The motion of the object also depends on the direction of force.
What results if a broken chromosomal fragment becomes reattached as an extra segment to a sister or non-sister chromatid? A Duplication B Inversion C Polyploidy D Nondisjunction
Answer:
The correct answer is option A "Duplication".
Explanation:
Chromosomal duplication is defined as a type of rearrangement of genetic material at which extra copies of a DNA fragment are created. In this case if a broken chromosomal fragment becomes reattached, this fragment will represent an extra copy, and therefore the resultant genetic material is considered a chromosomal duplication.
Which type of model is represented in the following image?
a
Computer simulation
b
Graph
с
Map
d
Small-scale object
Answer:
d
Explanation:
Its a map but showing the northern, southern, Eastern, and Western province of the earth.
y is the enzyme that catalyses the hydrolysis of sucrose into glucose and fructose. What is enzyme y?
Answer:
y enzyme is Invertase
Explanation:
Invertase is the enzyme that catalyses the hydrolysis of sucrose into glucose and fructose.
Choose all the answers that apply.
Rapid burial _____.
increases exposure to oxygen
decreases exposure to oxygen
slows down the rate of decay
prevents scavengers from eating organism remains
Answer:Organisms decompose more quickly when they are in contact with oxygen. Most environments exposed to the open air are in contact with plenty of oxygen, so the soft tissues of dead organisms, whether plants or animals, decay quickly. ... For an organism to become a fossil, it must not decompose or be eaten.
Explanation:
Scientists monitor the effects of a deadly parasite in a host. What trends will they most likely see?
A. As the parasite population increases, the host population decreases.
B. As the parasite population increases, the host population increases.
C. The host population decreases only if the parasite population decreases.
D. The host population will remain the same regardless of whether the parasite population increases or decreases.
Answer:
a
Explanation:
Rima eat guava explain how the teeth tongue and sliva will help to break it down
Answer:
Please find the role of teeth, tongue and saliva in digesting guava below
Explanation:
Digestion is generally the process of breaking down complex food substances into their simplest form. However, as easy as this sounds, there are series of processes that must take place in between to achieve the final result.
Once a food substance like guava enters the mouth (ingestion), it initially gets chewed by the TEETH in order to break it down to smaller masses that can be swallowed. During the process of chewing, the TONGUE helps to move the food around the mouth and later helps push it down the gullet/digestive tract. SALIVA, on the other hand, creates a moisturizing environment for the food to form a Bolus (round mass of food ready to pass down the esophagus). The saliva also contains an enzyme called AMYLASE that helps chemically degrade starch content of the food before passed through the digestive tract.
Which characteristic does a virus have in common with a eukaryotic cell?
Viruses are not cells; they are a strand of genetic material within a protective protein coat called a capsid. They infect a wide variety of organisms, including both eukaryotes and prokaryotes. Once inside the cell, they use the cell's ATP, ribosomes, enzymes, and other cellular parts to replicate.
The characteristics that a virus cell possess with eukaryotic cell is that they both possess a genetic material.
What is an eukaryotic cell?An eukaryotic cell is a cell that has a genetic material bound by membrane-bound nucleus.
A virus cell, on the other hand, is a cell that is incapable of replicating itself without a living host.
However, one similarity between the eukaryotic cell and viral cell is that they both possess a genetic material that stores their genetic information.
Learn more about cells at: https://brainly.com/question/3142913
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Help I don’t understand
Answer:
i don't understand sorry
Answer:
I think your supposed to write what happens in each box for the outcome of each situation like what happens in the filtration in Miguels blood test.
Explanation:
Part D What strengths and weaknesses do you see in your improved model?
Answer:
The new model correctly shows the process of oxygen and carbon dioxide exchange that takes place in the capillaries. However, it does not show that this oxygenated blood travels back to the heart for distribution to the body. It also does not show the structure of the alveoli.
Explanation:
PLATO answer
What are the advantages of having two chromogens cells an one? The full form of DNA.
Have extra set of chromosomes compared to other species that have the same but fewer set is being called polypliod organisms are constantly under assault from their environment. Having extra set of chromosomes make them better able to cope with the pressures that thretend to wipe them out.
Full form of DNA is Deoxiribose Nucleic Acid
Answer:
Deoxyribonucleic Acid
Explanation:
