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Lucia is walking barefoot in her yard. She accidentally steps on a nail. How will her nervous system work to generate a reaction? Arrange the events
chronologically.
Answer:
1. receoptors in her toe receive stimuli
2.her sensory neurone generates an impulse.
3. interneurones relay the impulse to motor neurons in spinal cord.
4. motor neurone signal the leg muscles
5. she immediately moves her foot
Explanation:
Answer:
A kind of nerve circuit that results in the generation of a reflex is known as the reflex arc. The information that originates from the surroundings is captivated by the sensory receptors, which converts the information to a nerve message and transmit it towards the central nervous system, which interprets it and produces a response.
In the given case, the reaction is generated in the following manner:
a. The receptors present in the toe attains stimuli.
b. An impulse is generated by the sensory neurons.
c. The impulse is relayed to the motor neurons in the spinal cord by the interneurons.
d. The leg muscles receive the signals by the motor neurons.
e. The foot gets moved instantaneously.
Secondary pollutants are more harmful than primary pollutants.
Please select the best answer from the choices provided
OT
OF
Secondary pollutants are more harmful than primary pollutants. the given statement is true.
What is a secondary pollutant?
Pollutants that originate in the atmosphere are known as secondary pollutants. These contaminants aren't directly emitted by a source (like vehicles or power plants). Rather, they emerge when pollutants produced from these sources combine with molecules in the atmosphere to create a new pollutant.
Secondary pollutants are created by the reaction of primary pollutants with atmospheric chemicals. Ozone, smog, sulfur trioxide, acid rain, hydrogen peroxide, and acetylnitrites are all examples of this. These substances have been changed and are more harmful.
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A lizard lives in a desert. Which would be an adapation for this lizard?
The correct answer is :
A number of lizard species have adapted to life in the desert. Some desert lizards have toes lined with spiked scales so they can walk across the sand without sinking in. Others burrow into the sand to escape the intense heat of the desert, to hide from predators, or to look for small animals to prey on.
What do you mean by adaptation?
Adaptation is the physical or behavioral characteristic of an organism that helps an organism better survive in the environment.”Living things are adapted to the habitat in which they live.Because they have special properties that help them survive.Learn more about adaptation below
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Compare the role of ATP in cells with the roles of RNA
The comparison of the role of ATP in cells with the roles of RNA is that the structure of ATP s made up of ribose sugar, adenine nitrogenous base, and three phosphate groups while RNA is made up of ribose sugar, four nitrogenous bases (adenine, guanine, cytosine, uracil), and one phosphate group.
What is ATP?ATP stands for Adenosine triphosphate. It may be defined as a high-energy compound that provides energy to drive many processes in living cells, such as muscle contraction. It is the major source of energy for use and storage at the cellular level.
Both ATP and RNA possess ribose in their structure. RNA directly involves in the synthesis of protein which plays an essential function in the metabolic processes. While ATP provides direct energy to the cells for their effective functions.
Therefore, the comparison of the role of ATP in cells with the roles of RNA is well described above.
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is a fossil fem that helped support Wegener's hypothesis of continental drift
A. Gondwanded
B. Kannemerid
C. Mesosaurus
D. Glossopters
Which is a disadvantage of asexual reproduction?
Answer:
The greatest disadvantage is the loss of genetic diversity is the Asexual reproduction allows the plants to reproduce very quickly.
Explanation:
This means the parent plant will be competing with a great number of offspring for the same nutrients, sunlight, and space.
HOPE IT'S HELPFUL
Cumulus and cumulonimbus clouds are most likely to be formed by a _______ front
occluded
warm
stationary
cold
Answer:
cold
Explanation:
One day, cars may run on fuel cells. Fuel cells obtain energy from the synthesis of gaseous water from hydrogen and oxygen. If all cars switched from burning fossil fuels to fuel cells, which might you expect to also occur?
Switching all cars to fuel cells would lead to a significant reduction in harmful emissions, decrease global dependence on fossil fuels, and necessitate a shift towards renewable energy to produce hydrogen. It would also involve challenges like developing a comprehensive hydrogen fuel infrastructure.
Explanation:If all cars switched from burning fossil fuels to using fuel cells, we would expect several significant changes. First and foremost, there would be a notable reduction in the emission of harmful pollutants, as fuel cells produce water as their only byproduct. Unlike the combustion of gasoline, which releases carbon dioxide, nitrogen oxides, and particulates into the atmosphere, the synthesis of gaseous water from hydrogen and oxygen in fuel cells results in a cleaner environment. Additionally, the global demand for fossil fuels would decrease, potentially reducing the geopolitical tensions associated with oil production and distribution.
Another consequence could be the transformation of the global energy infrastructure. Energy sources would need to shift towards those that can produce hydrogen efficiently, such as solar and wind power, to supply the hydrogen required by fuel cells. This would accelerate the transition to renewable energy resources, further diminishing the carbon footprint of human activity.
However, the shift to fuel cell technology would also present challenges, such as the development of a comprehensive hydrogen distribution network to refuel vehicles efficiently. This would require significant investment and innovation in storage and transportation technologies for hydrogen, which is highly flammable and requires careful handling.
What is insulin's structure?
a.quaternary
b.secondary
c.primary
d.tertiary
during the final stage of the cell cycle, cytokinesis allows the cell to finish dividing, creating _____ with ____ copies of DNA. can someone fill in the blanks?
Answer:
During the final stage of the cell cycle, cytokinesis allows the cell to finish dividing, creating
✔ two cells
with
✔ identical
copies of DNA.
Explanation:
edge
During the final stage of the cell cycle, cytokinesis will allow the cell to finish dividing, creating two cells with identical copies of DNA.
Why does cytokinesis occur during the final stage?Cytokinesis is a crucial process that follows cell division by ensuring that the newly formed daughter cells receive their fair share of organelles, cytoplasm and genetic material.
This event marks the culmination of the cell cycle specifically the M phase and is essential for the continuity of life. As the cell undergoes mitosis or meiosis, its genetic material which are organized in chromosomes is equally divided into two daughter nuclei.
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Which of the following is a correct statement about human evolution?
A.Humans did not evolve
B.Humans have evolved and continue to evolve
C.Humans evolved until about 5 million years ago, but no longer evolve
DHumans have evolved and continue to evolve socially, but not biologically
Humans have evolved and have also continued to evolve as the years go by.
What is evolution?The term evolution refers to the chages that occur as an organism changes from one form to another. These changes take millions of years.
Humans have a rich history of evolution and have also continued to evolve as the years go by.
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If the amount of milk a person drinks increases, the strength of his or her bones will stay the same.
Independent variable: _______
Dependent variable: _______
Answer:
Independent variable: amount of milk
Dependent variable: strength of bone
Explanation:
independent variable is the variable that you change.
dependent variable is the variable that depends on the changing variable
In this scenario, the independent variable is the 'amount of milk a person drinks', while the dependent variable is 'the strength of his or her bones'. The independent variable is what is being controlled or changed, and the dependent variable is the outcome or result that is measured.
Explanation:In this statement, the independent variable is the 'amount of milk a person drinks'. The independent variable is the factor that we change or control in an experiment. In this case, the person can control how much milk they drink.
On the other hand, The dependent variable is 'the strength of his or her bones'. The dependent variable is what we measure or observe to see if it changes in response to the independent variable. Here, we would measure the strength of the person's bones in relation to the amount of milk they consume.
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In an experiment, the hypothesis is if the wavelength of the light shining on a plant is shortened, the rate of the photosynthesis is slowed Down. This hypothesis is_____
Testable
Falsifiable
Both of the above
None of the above
Answer:
Both of the above
Explanation:
Falsifiable means that some observation might show it to be false. In this case, I can perform a test in which the wavelength of the light shining on a plant is shortened, and the rate of the photosynthesis is not slowed down; then, the hypothesis is falsifiable.
A testable hypothesis is a hypothesis that can be proved or disproved as a result of testing. Again, I can perform a test in which the wavelength of the light shining on a plant is shortened, and measure the rate of the photosynthesis; then, the hypothesis is testable.
In what form will Susan be able to capture that phosphorus as it is released from the sedimentary rock
Answer:
Soluble phosphorus
Explanation:
Soluble phosphorus is a measure of orthophosphate (PO4), the
soluble and inorganic filterable fraction of phosphorus, which is the most
stable type of phosphate and it is the form directly used up by the plant
cells.
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Susan can capture phosphorus as the phosphate ion (PO₄³⁻) when it is released into the environment through weathering of sedimentary rocks and becomes available to both terrestrial and marine food webs.
Susan will be able to capture phosphorus in the form of the phosphate ion (PO₄³⁻) as it is released from the sedimentary rocks. This release occurs through the processes of weathering and volcanic activity. Once phosphate is released into the soil, water, and air, it becomes available to terrestrial food webs. It also enters the oceans via surface runoff, groundwater flow, and river flow, where it becomes part of marine food webs. In these environments, living organisms take up phosphate ions to use in various biological processes such as the synthesis of DNA, RNA, and ATP.
The process by which a population becomes better suited to its environment is known as ?
Answer:
adaptation
Explanation:
3. Most animals and plants reproduce sexually. This means that DNA is passed down to new organisms from two parental organisms
Which of the following is a key advantage of sexual reproduction?
A. Increased genetic diversity for changing environments
B. The creation of new genes to improve survival
C. The receipt of the strongest genes from both parents for survival
D. The elimination of genetic mutations from a parent organism
Answer:
The correct option is A.
Explanation:
There are two basic types of reproduction, they are asexual and sexual reproduction. Asexual reproduction involves the division of a mature organism into two different organisms through binary fission or other forms of asexual reproduction. In this case the offspring is similar both physically and genetically to the parent organism. There is no genetic diversity in this case and the same disease can easily wipe out the entire population of the organism.
Sexual reproduction on the other hand requires two different organisms. During the reproductive process the genetic materials from the two organisms get mixed up thoroughly, so they end up giving birth to offspring that are quite different from them genetically.
The diversity in genetics makes it possible for the offspring to cope with changing environmental conditions. Because, the offspring are diverse in constitution, some offspring will always be able to survive harsh environmental conditions due to their genetic make up.
Answer:
The Option A is correct i.e.
Sexual organisms increases genetic diversity for changing environments
Explanation:
Reproduction is the biological process by which new organisms are produced from their parents.
In asexual reproduction, an organism can reproduce without the involvement of another organism. By asexual reproduction, an organism creates a genetically similar or identical copy of itself.
Sexual reproduction typically requires the sexual interaction of two specialized organisms, called gametes, which contain half the number of chromosomes of normal cells and are created by meiosis, with typically a male fertilizing a female of the same species to create a fertilized zygote. This produces offspring organisms whose genetic characteristics are derived from those of the two parental organisms.
The diversity in genetics makes it possible for the offspring to cope with changing environmental conditions. Because, the offspring are diverse in constitution, some offspring will always be able to survive harsh environmental conditions due to their genetic make up.
CONNECTION
Compare and contrast genetic engineering to the process of natural selection. Select all statements that
are true.
The exchange of carbon dioxide and oxygen in the alveoli of the lungs is an example of what?
A) Endocytosis
B) Active Transport
C) Passive Transport
D) Secondary Active Transport
Answer:
The correct answer is C) Passive transport
Explanation:
During the respiration process exchange of gases takes place between lungs and blood. This gas exchange is carried by simple diffusion which is a passive transport. Here gas molecule moves from area of higher concentration to the lower concentration area.
The lung's alveoli are surrounded by blood capillaries in which the concentration of CO2 is high while in alveoli concentration or partial pressure of CO2 is low so CO2 moves from blood to alveoli through diffusion.
In the case of oxygen, the concentration of oxygen is high in alveoli and less in blood inside blood capillaries so oxygen moves from alveoli to blood by diffusion. So the right answer is C.
Monkeys and humans share many of the same DNA sequences and have similar proteins, indicating that
a....the two groups belong to the same specie
b....the two groups share a relatively recent common ancestor
c....the two groups first appeared on Earth at about the same time
d....monkeys evolved from humans
This organism is not capable of performing photosynthesis.
(horseshoe crab)
TRUE
FALSE
Answer:
True
Explanation:
Which means "to study or examine”? reproduce analyze quantify validate
Answer: Analyze
Explanation:
Analyze is the correct option. This is because when we analyze something we need to observe and examine it. The analysis process is done so as to draw a valid and authentic conclusion, which can be utilized to frame result and outcome of the research or experimentation. The analysis process should not be based upon presupposition or prediction instead it must be based upon the data obtain after the experimentation.
The term "to study or examine" refers to the process of exploring, investigating, or scrutinizing a subject or topic in a systematic and thorough manner. It involves delving into the details, gathering information, and gaining a comprehensive understanding of the subject under consideration.
Let's examine the meanings of the given words in relation to studying or examining:
Reproduce: Reproducing in this context means to replicate or recreate a study or experiment that has already been conducted. By reproducing a study, researchers aim to verify or validate the original findings and assess their reliability or generalizability.
Analyze: Analysis involves breaking down a subject or data into its constituent parts, examining each component, and evaluating their relationships or patterns. Through analysis, researchers identify key elements, explore their significance, and draw conclusions or make inferences based on the evidence.
Quantify: Quantification refers to the process of assigning numerical values or measurements to variables or observations. It involves converting qualitative data into the quantitative form, enabling researchers to analyze and interpret the data using statistical methods or mathematical models.
Validate: Validation involves assessing the accuracy, reliability, or authenticity of a study, experiment, or information. It entails confirming the soundness of methodologies, data collection processes, and analysis techniques. Validation is crucial to ensure the credibility and trustworthiness of research findings.
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What happens when a Chlorine atom gains an electron its outer energy shell
Answer:
It becomes an ion, specifically an ANION.
Explanation:
A stable Chlorine atom would be neutral, or it would have no charge. This means that there is an equal number of electrons and protons (17 to be specific).
When a stable atoms gains or loses an electron, it's charge will not be neutral anymore because there would either be more electrons, than protons; or more protons than electrons.
In the case of your problem, there would be more electrons, so when electrons outnumber the protons, then the atom becomes negatively charged. A negatively charged ion is called an ANION.
Neutral ANION
Cl → Cl⁻
Describe how alleles and genes are related
DNA is composed of long strings of nucleic acid sequences, but not all of them code for proteins.But the ones that do are called genes.
Alleles are different versions of a certain gene.As an example, the gene that codes for blood type has 3 different alleles, A, B, an O. The genes that code for hair and eye color also have many different alleles.
Hormones are chemical molecules produced by glands. Vasopressin is a hormone secreted by the cells of the hypothalamus, a part of the brain. The hormone regulates homeostasis through its effect on the kidney cells. Which statement is true based on this information?
A.
All cells in the human body produce the same types of hormones.
B.
Specialized cells allow for different organs to work together to perform a function.
C.
Cells can work together only if they’re located in the same area of the body.
D.
All cells in the human body have the same structure and function.
Answer:
The statement that is true is B. Specialized cells allow for different organs to work together to perform a function.
Explanation:
The phenomenon of cell differentiation allows different cells to have contrasting structures and functions. Each cell can be shaped according to its function based on this phenomenon. For example the erythrocytes have a hollow structure which allows it to carry oxygen from the lungs to other parts of the body.
Specialized cells that work together form tissues. For eg, the epithelial cells from the skin and small intestine form the epithelial tissue which functions to protect the body surfaces. And tissues work together to form organs, and different organs work together due to the functioning of specialized cells.
Answer:
B
Explanation:
Which neurotransmitter is typically reduced in someone who suffers from depression, and is a primary target of anti-depressant medications?
When an individual is in a depressed state, the neurotransmitters serotonin, norepinephrine and dopamine are all reduced in the brain. However, since the compound that is a primary target of anti-depressant medications is serotine, said transmitter is your answer.
Answer:
Serotonin.
Explanation:
depression can be treated by targeting increase serotonin in the synaptic cleft with help of SSRIs and MAOi.
6.
The blood component that has the greatest affinity for oxygen is the
a) Lymphocyte" (b) Leucocytes (c) Erythrocytes (d)
Thrombocyte
Answer:c
Explanation:
the question is asking for another name for red blood cells since they bind with oxygen and hemoglobin in our body.
The component of blood with the greatest affinity for oxygen is the erythrocyte, or red blood cell. This is because erythrocytes contain a protein called hemoglobin that binds to oxygen, enabling it to be transported from the lungs to the body's tissues.
Explanation:The blood component that has the greatest affinity for oxygen is the Erythrocyte (c). Erythrocytes, also known as red blood cells, are the primary transporters of oxygen in the blood. They contain a protein called hemoglobin that has a high affinity for binding to oxygen, making it essential for carrying oxygen from the lungs to tissues throughout the body.
Lymphocytes (option a) are a type of white blood cell involved in the immune response, Leucocytes (option b) is a general term for all types of white blood cells, and Thrombocytes (option d), also known as platelets, are involved in blood clotting. However, none of these other components bind oxygen like erythrocytes do.
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what happens when atoms share electrons?
A. They form covelant bonds
B. They form water molecules
C. They form ionic bonds
D. They form polar molecules
Answer:
A) They form covelant bonds
Explanation:
covelant bonding occurs when pairs of electrons are shared by atoms.
Where can you find prokaryotic and eukaryotic cells?
Answer:
Prokaryotic cells can be found in an area of the cell called the nucleoid. Eukaryotic cells can be found mainly in multicellular organisms.
Explanation:
What prevents lipids from mixing with water?
A. Water and lipids are both polar.
B, Water and lipids are both nonpolar.
C. Lipids are polar, but water is nonpolar.
D. Water is polar, but lipids are nonpolar.
Answer:
option D is answer
Explanation:
because water is polar and lipid is non polar, so it is insoluble in water that is it floats water.
The nonpolar nature of lipids prevents them from mixing with the polar nature of water. Thus option D is correct.
What are lipids?Lipids are a diverse group of organic compounds which is soluble in nonpolar solvents like ether, benzene, and chloroform while insoluble in water.
Being hydrophobic in nature, lipids do not interact with water to form bonds and are attached to water molecules. Hence, it remains insoluble in polar solvents like water.
Therefore, the correct option for this question is D.
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The science for classifying and naming organisms is known as __________.
Hello There!
Taxonomy is the science of naming and classifying biological organisms on the basis of shared characteristics.
Taxonomy is the field of naming types of organisms.