Answer:The percentage of oxygen in the air is essentially the same as at sea level (21%). However, the air pressure is 30% lower at the higher altitude
Explanation:The percentage of oxygen in the air at two miles (3.2 km.) is essentially the same as at sea level (21%). However, the air pressure is 30% lower at the higher altitude due to the fact that the atmosphere is less dense--that is, the air molecules are farther apart.
How are ecosystems started
Answer:
An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals, and other organisms.
How can Base Substitutions, Deletions, and Insertions cause changes in DNA and possibly lead to new traits.
Base Substitutions, Deletions, and Insertions cause changes in DNA and possibly lead to new traits through mutation process
DNA is a dynamic and adaptable molecule and as such the nucleotide sequence found within it are subject to change as the result of a phenomenon called mutation and depending on how a particular mutation modifies an organism genetic makeup and it can prove harmless and helpful and sometime a mutation may even cause dramatic changes in the physiology of an affected organism and mutation can be grouped into two main categories based on where they occur and that are somatic mutation and germ line mutation
Base Substitutions : they involve the swamping of one nucleotide for another during DNA replicationDeletions : is the type mutation that involve the loss of one or more nucleotides from a segment of DNA Insertions : is the type of mutation that involves the addition of one or more nucleotides from a segment of DNAKnow more about Base Substitutions
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xhegg which phase of the action potential would be most affected by poisoning of the sodium-potassium atpase?
When the sodium-potassium at phase is poisoned, the action potential's rising phase is most likely to be impacted.
What impact does action potential have on sodium-potassium pump?The action potential created by nerve cells is significantly influenced by the sodium-potassium pump. The reason this pump is known as a P-type ion pump is that the ATP interactions phosphorylate the transport protein, changing its shape.
Why do potassium channels block affect the action potential?Action potentials are terminated, hyperpolarization occurs, and excitability decreases as a result of activation, which also increases conductance. When the channels are blocked, on the other hand, depolarization, prolonged action potentials, repetitive firing, and increases in transmitter release and endocrine activity result.
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which of the following statements about sodium and potassium is false? group of answer choices processed foods are a major source of both sodium and potassium. both participate in maintaining fluid balance. both are major electrolytes in the body. both are involved in nerve signal transmission.
Processed foods are a major source of both sodium and potassium is the false statement
The correct statement should be : Processed foods tend to be low in sodium and high in potassium.
Other statements :
sodium and potassium both participate in maintaining fluid balance. sodium and potassium both are major electrolytes in the body.sodium and potassium both are involved in nerve signal transmission.To learn more about Processed foods click here
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Have you had the chance to watch a tree grow over a span of several years? Did you notice that the tree grew thicker and taller? Deep in the roots of the tree and high in the growing shoots are meristem cells. Each year, the meristem cells help the tree continue to grow. As a tree ages, it needs to keep making more xylem and phloem cells to carry water and food.
Which statement explains how this occurs?
A. Xylem and phloem from one part of the plant are transferred to another part.
B. The existing xylem and phloem divide to make more xylem and phloem.
C. Cell division is not necessary for a plant to create new xylem and phloem cells.
D. Meristem cells divide and some of the new cells differentiate into xylem and phloem.
Answer:
I think its D
Explanation:
hope this helpsss :)
intervertebral discs comprised of fibrocartilage are found within what type of joints? multiple choice question. symphyses syndesmoses synchondroses sutures
Intervertebral discs comprised of fibrocartilage can be found at the symphyses.
Intervertebral discs are discs made of cartilage that function to prevent spinal structures from rubbing against each other and serve as cushions for the spine. Cartilage which is made of dense, clear, bluish-white and very strong material has two types of joints, one of which is the symphysis joint where the bones are connected by flat fibrocartilage discs which remain unhardened throughout life., for example, the intervertebral disc and pubic symphysis which join the pub part of the right and left vertebrae. For this reason, the symphysis joint is often referred to as a fibrocartilaginous joint.
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a child has a relatively large amount of brain tissue removed to control a seizure disorder. several years after the surgery, she has almost completely normal functioning. this is evidence of which quality of nervous system tissues?
In seizure disorders, electrical activity in the brain is periodically interrupted, resulting in some temporary impairment of brain function.
What in the brain causes seizures?Nerve cells (neurons) in the brain generate, send, and receive electrical impulses that allow nerve cells in the brain to communicate. Anything that interferes with these communication paths can lead to seizures. Genetic mutations may be the cause of some types of seizure disorders.In seizure disorder, the brain's electrical rhythms tend to become unbalanced, leading to recurrent seizures. In patients with seizures, normal electrical patterns are disrupted by sudden, synchronized bursts of electrical energy that can temporarily impair consciousness, movement, or sensation.Which parts of the brain are affected during a seizure?The temporal lobe is the area of the brain most likely to lead to seizures. The mesial (middle) portions of both temporal lobes are of great importance in epilepsy. It often causes seizures and is susceptible to damage and scarring.
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PLS HELP ME!!??? :(
Is good a limiting factor for plants? Why or why not?
Answer:
In the natural world, limiting factors like the availability of food, water, shelter and space can change animal and plant populations. Other limiting factors, like competition for resources, predation and disease can also impact populations.
Explanation:
what happens to the number of atp in aerobic glucose catabolism if pyruvate could not become oxidated?
The number of ATP in aerobic glucose catabolism if pyruvate could not become oxidated is converted produce heat.
Approximately 40% of the glucose's available energy is converted into ATP via aerobic respiration. Your comparatively high body temperature is produced by the remaining 60% of your body, which is wasted as heat. Although 40% efficiency may appear low, the top car engines are several times more efficient.
The vast majority of life on Earth uses aerobic cell respiration because it is superior to anaerobic respiration. However, using oxygen includes some expenses. Cellular processes can change oxygen into toxic forms that harm biological molecules. Because of this, you would perish within a few days if forced to breathe 100% oxygen instead of the 21% of our current atmosphere.
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suppose that the genetic code involved five nucleotides per codon but that there were only two different types of nucleotides. how many different codons would be possible?
Answer:
Explanation:
there would be 32 different types of codons would be possible
PLSSS HELP IF YOU TURLY KNOW THISS
Answer:
C
Explanation:
Answer:
c) Herbivores
Explanation:
The consumer that only eats producers is called as herbivores. Therefore, the option (c) is the correct answer.
Based on the information from the laboratory about hydrolysis & your knowledge of solubility why are carbohydrates excellent sources of quick energy for organisms
Carbohydrates are excellent source for quick energy because they are easily broken down by the process of hydrolysis. This happens because carbohydrates are easily soluble in water due to the various polar OH groups attached to its carbons.
Carbohydrates are one of the most essential food component required in diet. There are three types of carbohydrates: monosaccharides, disaccharides and polysaccharides. Chemically, carbohydrates are polyhydroxy ketones or aldehydes.
Hydrolysis is the reaction where the water molecules break the bonds of the substance subjected to hydrolysis. The water itself also gets decomposed in the process.
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PLSSS HELP IF YOU TURLY KNOW THISS
Answer:
It’s D
Explanation:
Answer:
d) Decomposer
Explanation:
Decomposer is the organism that digests the waste and remains of dead producers and consumers. Therefore, the option (d) is the correct answer.
in an isotonic solution, the amount of solutes inside the cell is _____ to the amount of solutes inside the cell
Answer:
isotonic
Explanation:
When someone is having a blood test done to see if they are hiv-positive, what specifically is being looked for in the blood sample?.
When someone is having a blood test done to see if they are hiv-positive, the antibodies to the virus are specifically being looked for in the blood sample.
What are Antibodies?
This is referred to as immunoglobulin and they are protective proteins which are produced by the immune system. They normally attach to the antigens and use different mechanisms to eliminate or fight against it.
In the laboratory , blood test is done to see if they are hiv-positive and they look out for antibodies to the virus which depicts that it is present in the body system of the individual.
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when someone is having blood test done for hiv-positive. the test looks for both antibodies and antigen in the blood sample.
what are antibodies?
An antibodies is a blood protein produced in response to and counteracting a specific antigen. antibodies mixes chemically in the body with substances which the body recognizes as alien.
what is an antigen?
An antigen is a toxic substances which induces an immune response in the body.
In conclusion HIV antibodies are disease-fighting protein that the immune system makes when you have an HIV infection.
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a(n) is a neuron that carries infromation from the external environment or from the body, back to the central nervous system
A sensory neuron is a neuron that carries information from the external environment or from the body, back to the central nervous system.
When you contact a hot surface with your fingertips, your sensory neurons will fire and transmit messages to the rest of your nervous system about the information they have just received. Sensory neurons are the nerve cells that are activated by sensory input from the environment. The brain obtains information from sensory neurons thus allowing us to sense, touch, see, smell. The brain interprets the information and sends the instruction back to the muscled using motor neurons and thus allowing us to act accordingly.
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two competing theories about the source of oxygen in photosynthesis were tested in the 1940s-50s using radioactive isotopes. about what did the theories disagree?
Theories that were obtained while doing research using radioactive isotopes disagree as to whether the [tex]O_{2}[/tex] produced during photosynthesis came from [tex]CO_{2}[/tex] (carbon dioxide) or [tex]H_{2}O[/tex] (water).
Most scientists believed that plants produced [tex]O_{2}[/tex] by removing it from [tex]CO_{2}[/tex] in the 1800s. In the 1950s, researchers tested this theory by tracking the fate of oxygen atoms during photosynthesis using the heavy oxygen isotope [tex]^{18}O[/tex].
There was two experiments:
1. A plant exposed to [tex]^{18}O[/tex]-containing carbon dioxide produced no labeled oxygen gas ([tex]^{18}O[/tex] containing).
2. A plant given [tex]^{18}O[/tex] water produced tagged [tex]O_{2}[/tex].
These investigations demonstrated that the [tex]O_{2}[/tex] produced during photosynthesis is derived from [tex]H_{2}O[/tex] rather than [tex]CO_{2}[/tex].
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in a population of mustard plants, the gene that determines the height phenotype has two alleles. the allele for tall plants (t) is dominant to the allele for short plants (t). in the same population of plants, the gene for flower color also has two alleles. the allele for white color (w) is dominant to the allele for yellow color (w). a mustard plant that is homozygous dominant for both height and flower color is crossed with a mustard plant that is homozygous recessive for height and heterozygous for flower color. what are the possible genotypes of the offspring of this cross?
These crosses could result in genotypes with homozygous dominant, homozygous recessive, or heterozygous genes.
What is the genotype of this cross's progeny?The genetic makeup of the sex cells or gametes (ova and sperm) that were combined during conception to create an offspring determines its genotype. Each parent contributed one sex cell. Normal sex cells only have one copy of each gene for each characteristic.
How can the genotype of a test cross be determined?By examining the phenotypes of the offspring, the unknown genotype can be identified. If mating the unknown recessive phenotypic individual with the unknown dominant phenotype (PP or Pp genotype) results in solely dominant phenotypes (no recessive), then the unknown individual is homozygous dominant.
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Resistant and nonresistant E. coli bacteria samples were spread on the agar plates below and incubated for 24 hours. Select the true statements from the list below.
The resistant E. coli strain grows on streptomycin negative plates.The resistant E. coli strain grows on streptomycin negative plates.
The nonresistant E. coli strain grows on streptomycin negative plates.The nonresistant E. coli strain grows on streptomycin negative plates.
The nonresistant E. coli strain grows the same on streptomycin positive or negative plates.The nonresistant E. coli strain grows the same on streptomycin positive or negative plates.
The resistant E. coli strain grows on streptomycin positive plates.The resistant E. coli strain grows on streptomycin positive plates.
Both resistant and nonresistant E. coli strain show no growth on streptomycin positive plates.Both resistant and nonresistant E. coli strain show no growth on streptomycin positive plates.
The nonresistant E. coli strain shows more growth on the streptomycin positive than the resistant E. coli strain.
The true sentences are:
(A). The resistant E. coli strain grows on streptomycin-negative plates. The nonresistant E. coli strain grows on streptomycin-negative plates.
E. coli is a type of bacterium that is frequently found in the intestines of people and other animals. Some strains of this bacterium have the potential to cause extremely serious food poisoning.
The population of E. coli that is highly streptomycin resistant belongs to the streptomycin-positive strain, whereas the negative strain has the reverse effect.
That's why it's imperative to only choose a streptomycin-positive strain of the E. coli bacterium if you wish to grow up a significant number of streptomycin-resistant bacteria.
Therefore, you would need to select a colony of the bacteria from the streptomycin-positive plate and allow it to develop on a streptomycin-positive plate if you wanted to build up a big quantity of streptomycin-resistant E. coli.
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A teacher wants to know whether the scent of citrus in the classroom influences students' performance on the SAT math test.
During a first-period class, the teacher administers the test as usual with no fragrance in the room and records the students' scores.
During the second period, a different group of students enter the room. The teacher sprays the room with a citrus fragrance and administers the same math test. The teacher records the students' scores.
In this study, what is the independent variable and what is the dependent variable?
A. The independent variable is the teacher's first-period class, and the dependent variable is the second-period class.
B. The independent variable is the classroom, and the dependent variable is the teacher.
C. The independent variable is the score on the math test, and the dependent variable is the citrus smell.
D. The independent variable is the citrus smell, and the dependent variable is the score on the math test.
In this study, the option that is the independent variable and the dependent variable is C. The independent variable is the score on the math test, and the dependent variable is the citrus smell.
Which variable is dependent and which is independent?In mathematical modeling, statistical modeling, and experimental sciences, there are dependent and independent variables. Dependent variables are so-called because, during an experiment, their values are examined on the assumption or presumption that they are governed by the values of other variables.
Note that the cause is the independent variable. Its value is unaffected by the other study variables. Effect is the dependent variable. Changes in the independent variable affect its value.
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CAN SOMEONE HELP ME PLS!!!??:(
which lewis antigen(s) would be detected when phenotyping the red cells of an adult who has the le, se, and h genes?
Once the secretor (Se) genes is missing is the Lea antigen present upon that red blood cell membrane.
What are the 4 types of cells?Epithelial cells, which are closely bonded to one another, nerve impulses, which are specialized in communication, muscle cells, which are specialized in contraction, and connective tissue cells are the four primary cell types.
Where are cells found?Upon the earth, there really are living cells wherever unless it is sterile. If you run your hands along a smooth metal gate, you will likely find pollen, bacterial, fungal, and green algal cells (even wood is made up of dead plant cells).
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two martians fall in love and marry. one martian is homozygous for red eyes and the other is heterozygous. the recessive eye color is purple. what is the probability that they will have a child with purple eyes (assuming martians have similar genetics to humans)?
In terms of red eyes, one Martians is homozygous while the other is heterozygous. Purple eyes are recessive in color. Because it will be 50% homozygous (AA) and 50% heterozygous, there is 0% chance.
To have purple recessive eyes, we must have at least one recessive pair (aa).AA × Aa , there will be no progeny which shows aa genotype Each gene has two alleles that an individual inherits from each parent.
When a characteristic is recessive, both of the (recessive) alleles of the gene that causes the trait must be present for the trait to manifest. When just one copy is present, a recessive allele does not create a characteristic at all.
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fusion of an endocytic vesicle containing an enveloped virus with an endosome promotes uncoating because of
It’s because of the degradative enzymes and low pH inside the endosome.
What is an enveloped virus?
A virus which has an outer covering/envelope is considered an enveloped virus. This outer covering is formed during a process called budding off and the outer covering comes from the infected host cell. Newly created virus cells get enveloped in an outer coat, made of small piece of plasma membrane of cell during the budding process.
The vial genome is released inside host cell due to uncoating of the viral cell. During Uncoating, the capsid gets removed, thereby releasing the viral genome into host cells, after which gene replication and transcription takes place.
Hence, the uncoating of virus takes place due to degradative enzymes and low pH inside of the endosome.
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Which of the following courses might a genetic engineer take in college?
O Introduction to Horticulture
O Principles of Plant Agriculture
O Maneuvering Controlled Vehicles
O Recombinant DNA Applications
The course that a genetic engineer might opt for in a college is: Recombinant DNA applications.
Genetic engineering is the branch of biological science that deals with the manipulation of the genetic composition of an organism in order to alter some traits in the organism. Recombinant DNA technology has various applications which are beneficial for the society.
Recombinant DNA technology can help the genetic engineer to determine which genes can be modified in plants as well as animals so as to create genetically modified organisms, which are superior in certain characteristics as compared to their ordinary counterparts. For example genetically modified plants are pest-resistant.
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evolutionary theory is used in the real world for: group of answer choices guiding the thinking of computer scientists, but not for anything else. making professors feel good, but nothing else. fighting antibiotic resistance in diseases, but not for anything else. absolutely nothing. fighting diseases, and in other practical ways including guiding some techniques in computer science.
In the real world, evolution theory is employed for: A) Nothing at all. B) Trying to combat antibiotic resistance in illnesses but not elsewhere.
What are some examples of evidence for evolution?This section discusses five different sorts of evidence for evolution, including ancient organism remains, fossil layers, similarities between current-day animals, DNA similarities, and embryonic similarity.
What are the practical implications of comprehending evolution theories?The genes necessary to build different body parts can be found by understanding the changes that have taken place during organism evolution. These genes may also play a role in some genetic illnesses in humans.
What is the theory of evolution?Depending on the circumstances, different biological and behavioural approaches are Along with the organism's features like age, sex, health, or size, the environmental setting is also important.
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DNA polymerase repairs mistakes made durring DNA replication true or false
Answer: True
Explanation:
DNA polymerases from many species, including bacteria, viruses and eukaryotes, possess a 3′–5′ proofreading exonuclease activity which removes misincorporated bases from extending primers, thereby improving fidelity.
What are the effects of fossil fuels in the in environment ?
Answer:
1. release large amounts of carbon dioxide
2. releases green house gas which traps heat into the atmosphere
3. air pollution/ global warming
4. can cause acid rain
Explanation:
which new fossil find would favor the arboreal hypothesis for primate origins over the visual predation hypothesis?
According to the visual predation hypothesis, features of primates evolved as a result of their ability to hunt insects and other small animals.
What is hypothesis the meaning?In a scientific setting, a hypothesis (plural: hypothesis) is a tested claim regarding the connection between two or more factors or a suggested explanation for a phenomenon that has been observed.
What is an example of hypothesis?Several illustrations of basic hypotheses: In comparison to kids who skip breakfast, those who eat breakfast perform better on arithmetic exams. "Pupils who have test anxiety first before English exam do worst than the pupils who do not suffer from anxiety levels," complex.
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what would be the effect of swapping the dna-binding domain of a eukaryotic activator with a different dna-binding domain? multiple choice question.
The activator's ability to activate a target promoter is unaffected by the replacement of the DNA binding domain, which just changes the site at which it will function.
An activator protein binds to something, but what happens after it binds?The DNA regulatory sites close to the promoter regions, which function as on/off switches, are where activator proteins interact. This binding promotes the activity of the RNA polymerase and the transcription of adjacent genes.
How do activator proteins function in eukaryotic cells?Gene expression in a eukaryotic cell must be activated by transcriptional activators. RNA polymerase II can be drawn to the promoter or extended with the help of activators attached to the enhancer.
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