What is an independent variable?
A. a variable that is purposefully changed in an experiment
B, a group that matches the experimental group in all aspects, except that the independent variable does not change
C. an uncontrolled variable that could interfere with an experiment
D. a variable that does not change during an experiment
E. a variable that is changed by, or because of, the independent variable
An independent variable is the factor that is purposely manipulated in an experiment to investigate its impact on the dependent variable. The correct answer to the student's question is A. a variable that is purposefully changed in an experiment.
Explanation:An independent variable is a variable that is purposefully changed or manipulated in an experiment. It's the factor the experimenter chooses to vary to observe the effect this variation has on the dependent variable. For example, if a scientist hypothesizes that fertilizer amount affects plant growth, the independent variable is the quantity of fertilizer applied. During a well-designed experimental study, the independent variable is the only significant factor altered between the experimental and control groups. The experimental group receives the intervention or treatment that includes the independent variable, while the control group does not receive the experimental manipulation. Therefore, the correct answer to the question 'What is an independent variable?' is A. a variable that is purposefully changed in an experiment.
The use of _____ during pregnancy is most associated with premature birth, low birth-weight infants, and fetal death. nicotine caffeine aspirin all of these options
The drug that is associated when having to intake it when pregnant that is likely causing premature birth, low birth weight infants and the fetal death is the use of nicotine. This type of drug is a form of agonist in regards with nicotinic acetylcholone receptors.
The use of nicotine during pregnancy is most associated with premature birth, low birth-weight infants, and fetal death
Further Explanation:
Smoking during the gestation period increases the risk of health-related problems for the developing fetus. They include low birth weight, and preterm birth, birth defects of the mouth and lip. Smoking during and after pregnancy also increases the risk of sudden infant death syndrome (SIDS)
Injurious effects of drugs are:
To affect the memory of the brain To affect growth. To birth defect. To cause behaviour and learning problems. Hallucination
Nicotine drug communicates with endogenous acetylcholine receptors in lung and brain. The exposure of nicotine during developmental stage of fetus obstructs the normal neurotransmitter function. Thus, development of neurodevelopment abnormalities can affect the timing of neurotrophic actions.
During pregnancy, mothers should avoid having nicotine or smoking because the liver of the fetus is under development and not capable to process any kind of drug. If a woman is conceiving then she should care regarding drugs because it definitely affects the growth of the child.
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Answer Details:
Grade: High School
Subject: Health
Topic: Side effects of nicotine
Keywords
Alcohol, child, growth, nicotine, drug, behavior, learning, brain, memory, pregnancy, mother, disorder, fetus, learning.
When a cell is infected by a virus, synthesis of ______ begins and this protein diffuses away from the infected cell to protect nearby uninfected cells by binding to surface receptors and initiating synthesis of antiviral proteins?
which is the largest organizational level found in one coral reef?
In case anyone googled this and it comes up, its ecosystem for E2020.
Suppose you observed that tina has a circular area without hair on the back of her scalp. what word would best describe this
The student nurse is preparing a presentation on celiac disease. what information should be included? select all apply.
when the heated part of the mantle rises through the cooler part, this is an example of
Final answer:
Mantle convection is the cycle where hot mantle material rises, cools, and sinks, creating a convection cell. A mantle plume is a rising column of hot rock, and decompression melting occurs as this rock approaches the surface.
Explanation:
Correct answer is mantle convection. When the heated part of the mantle rises through the cooler part, this is an example of the mantle convection. Mantle convection is the process of heat transfer within the Earth's mantle, where the hot lower mantle material rises, cools, and then sinks again, creating a convection cell. The rising part of this cycle is represented by a mantle plume, which is a column of hot rock rising through the mantle that can cause hot-spot volcanism. As these materials move closer to the surface, they experience decompression melting, leading to the partial melting of rock and the formation of magma.
8. Triglycerides which are…
a. Solid at room temperature are called “______________________”
b. Liquid at room temperature are called “______________________”
a. Solids at room temperature are called "saturated fats."
b. Liquid at room temperature are called "unsaturated fats."
a. Solids at room temperature are called "saturated fats."
Saturated fats are triglycerides that have no double bonds between the carbon atoms in their fatty acid chains. Due to their chemical structure, they tend to pack closely together, resulting in a solid or semi-solid state at room temperature.
b. Liquid at room temperature are called "unsaturated fats."
Unsaturated fats are triglycerides that have one or more double bonds in their fatty acid chains. These double bonds introduce kinks or bends in the structure, preventing them from packing closely together, and resulting in a liquid state at room temperature.
Examples include most vegetable oils like olive oil, canola oil, and sunflower oil. Unsaturated fats are generally considered healthier than saturated fats and are often associated with beneficial effects on heart health when consumed in moderation.
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What is the name for the percentage of space not occupied by solid matter in soil
Dr. taylor discovers a chemical that is a very effective agonist for serotonin. briefly explain how this chemical might affect human behavior, and identify the condition dr. taylor might treat with this chemical
Students must identify that specific chemical because that chemical is an effective agonist for serotonin. This chemical is molecularly like enough serotonin that it is capable to activate serotonin receptor sites, and thus elevating mood.
Dr Taylor might use this chemical in treating mood disorders such as depression.
Which of the following is an example of a beneficial mutation?
a mutation causing uncontrolled cell division in human tissue cells
a mutation inhibiting human immunodeficiency virus from entering the host cell
a mutation resulting in partial or complete loss of chlorophyll pigments in plants
a mutation resulting in a squirrel being born without ovaries
A beneficial mutation is one that provides an advantage or benefit to an organism. An example of a beneficial mutation is a mutation inhibiting human immunodeficiency virus (HIV) from entering the host cell.
Explanation:An example of a beneficial mutation is a mutation inhibiting human immunodeficiency virus (HIV) from entering the host cell. This mutation could potentially protect individuals from contracting HIV if the virus cannot enter and infect their cells.
On the other hand, a mutation causing uncontrolled cell division in human tissue cells can lead to cancer, which is not beneficial.
A mutation resulting in partial or complete loss of chlorophyll pigments in plants can impair their ability to carry out photosynthesis and obtain energy from the sun, which is also not beneficial.
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In an unconformity between two layers of rock, how is the lower layer usually described?
A. Much older than the upper layer.
B. Much younger than the upper layer.
C. The same age as the upper layer.
D. A little younger than the upper layer
Answer: A. Much older than the upper layer.
An unconformity is a gap in age between two rock units. The upper unit is usually younger than the lower layer due to deposition of sediments in the lower layer due to erosion. Age gap between two layers of sediments or rocks depends upon how long the erosion took place and period in which deposition of sediments stopped or ceased.
Answer:
The answer is A
Explanation:
When sedimentary rock is formed, it is shoved beneath the surface and soon covered in more rock. So the oldest rock will be shoved further beneath the surface.
One strand of dna is 5' - aggcctta - 3'. what is the opposite strand?
Hormones derived from amino acids can cause different effects in different cells depending on the type of cell and ______.
Jon is a scientist researching the heat value of coal. Which heat measurement should he use?
The heat measurement Jon should use is the enthalpy of combustion, which measures the amount of heat released when a substance is burned completely.
Explanation:When researching the heat value of coal, the measurement Jon should use is the enthalpy of combustion. The enthalpy of combustion measures the amount of heat released when a substance, such as coal, is burned completely. To determine the heat value per gram for different fuels, Jon will need to compare the enthalpy of combustion for each fuel. The fuel with the highest enthalpy of combustion will produce the greatest amount of heat per gram when burned under standard conditions.
Final answer:
Jon should use the joule (J) to measure the heat value of coal. The enthalpy of combustion in kJ/g allows comparison of different fuel heats. Efficiency calculations can use joules to assess a coal power station's performance.
Explanation:
Jon, the scientist researching the heat value of coal, should use the joule (J) as it is the SI unit of energy and is commonly used to measure the heat value of substances like coal. When he burns the coal under standard conditions, the amount of heat released can be measured in joules per gram (J/g). To compare the energy content of different fuels, he may refer to the specific enthalpy of combustion values given in scientific data.
For example, if the enthalpy of combustion of hard coal is given as -35 kJ/g, this indicates that each gram of coal releases 35 kilojoules of heat upon combustion. Similarly, if he were to compare this with other fuels like CH4 (methane) or C2H2 (acetylene), Jon would look at their respective enthalpies of combustion to determine which produces the greatest amount of heat per gram.
The efficiency of a coal power station, another application of heat measurement, can be determined using the joules of energy transferred by heat during the process compared to the total energy produced. This type of calculation might take into account both the heat transferred to electricity and the heat lost to the environment.
What word should you always associate with “lipids”?
(( there is no answer options just give me a suggestion))
The association of the term 'lipids' should be with 'fats'. Lipids include a variety of substances such as fats, waxes, sterols, and fat-soluble vitamins, all serving critical roles in the body, like energy storage and cellular function.
Explanation:The term that you should always associate with lipids is fats. Lipids are a group of naturally occurring molecules that include fats, waxes, sterols, and fat-soluble vitamins, among others. Lipids serve important functions in the body. They serve as energy storage, and insulation for our bodies, and are an essential component of all cell membranes. One of the common examples of lipids is triglycerides, which are the primary form of fat stored in the body. So, when you think of lipids, think of fats or fatty substances.
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Why was modern classification invented?
Answer:
Modern classification was invented in order to classify the organisms more clearly.
The organism were classified based on their similarity in characters. Then day by day the number of organisms increased and there was confusion in classifying the organism based on the prior knowledge.
Thereafter modern classification was introduced to simplify the classification by offering more wide are for the classification of a wide variety of organism.
More diversity of species of organism is available these days so there was a need to revise the classification with some modifications in it.
African americans experience· ______ , which tends to increase· blood· pressure . 1. a diet higher in salt· than european americans 2. a diet lower in fat· and higher in fiber· 3. larger and more cohesive families 4. discrimination· based on skin· color· 5. a stress-diathesis based on their genes
Which organelle is the power house of the cell the site of cellular respiration
A ligand cannot bind to the active site of an enzyme.
a. True
b. False
A ligand can bind to the active site of an enzyme. However, an allosteric inhibitor can bind to an enzyme away from the active site, causing a conformational change in the active site that decreases its affinity for the substrate.
Explanation:A ligand can bind to the active site of an enzyme. The active site is a specific region on the enzyme where the substrate binds, leading to the catalysis of a biochemical reaction. However, an allosteric inhibitor can also bind to an enzyme but away from the active site, causing a conformational change in the active site. This change decreases the affinity of the active site for the substrate, inhibiting the enzyme's activity.
The purity of cocaine in crack averages about __________.
The tissue which regulates the entrance of water and minerals into the vascular cylinder of a root is the
Which process causes the easterlies to flow in the direction they do? A. movement of a convection cell B. even heating of the earth at all places C. solar wind D. Coriolis effect
Answer:
D. Coriolis effect
Explanation:
The esterlies are the air currents that are located in the poles and are cold irregular currents with low pressure, the usually travel towards the equator but then are deflected and follow the west due to the coriolis effect. SO from the options the one that is correct would be the coriolis effect.
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What did the extinction of the dinosaurs lead to?
the collision of a comet with Earth
the extinction of birds
the evolution of mammals
the destruction of the ecosystem
A blood alcohol concentration above ________ will often result in death
Review the phases of the cell cycle in model 1 by placing the abbreviated phase name (g1 , s, g2 or m) next to the proper description. ______ the cell grows by producing more proteins and organelles. ______ dna replication occurs. ______ the cell prepares for cell division with the appearance of centrosomes. ______ mitosis and cytokinesis occurs.
All platyrrhines __________.
a. have a relatively large body size
b. have three premolar teeth
c. are primarily terrestrial
d. all of these
The properties of noncrystalline materials are anisotropic. true or false
It is false!
Further Explanation:
non crystalline mean:
In consolidated issue material science and materials science, a nebulous or non-crystalline strong is a strong that does not have the long-extend request that is normal for a precious stone. Different kinds of indistinct solids incorporate gels, dainty movies, and nanostructured materials, for example, glass.
Case of a non crystalline strong:
A few models incorporate sodium chloride, ice, metals, and jewels. Undefined solids, then again, are unbending, yet they need rehashed periodicity or long-extend request in their structure. These substances don't demonstrate a sharp differentiation between the strong and fluid states.
non crystalline silica:
Silica is synonymous with silicon dioxide (SiO2). ... Silica exists in a wide range of structures that can be crystalline just as non-crystalline (nebulous). Crystalline silica is hard, artificially dormant and has a high liquefying point.
Distinction among crystalline and non crystalline structures in materials:
The distinction among crystalline and non crystalline solids is that crystalline solids have a uniformly disseminated three-dimensional course of action of iotas, particles, or atoms while non-crystalline solids don't have a predictable game plan of particles.
Subject: biology
Level: college
Keywords: non crystalline mean, Case of a non crystalline strong, non crystalline silica, Distinction among crystalline and non crystalline structures in materials.
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Grasslands and the tundra are both home to large herds of grazing animals.
What makes caribou different from the herbivores of warmer climates?
Caribou have a thicker coat of fur and wider hooves.
Caribou are migratory and only spend summers in the tundra.
Caribou have adapted to the lack of vegetation by eating animals as well.
Caribou have larger ears to allow excess heat to escape.
In glycolysis, the isomerization of glucose to fructose is necessary because