Three independent variables: CO2 concentration, Light intensity, and O2 production
How do I identify the independent variable?Put the variables in the line "The Independent variable causes a shift in Dependent variable" to distinguish dependent and independent variables in study the easiest manner possible.
What types of variables can be used in research?Characteristics called variables can have various values. It is an independent variable that doesn't alter as a result of the other variables you're attempting to assess. An independent variable could be something like a person's age. Other aspects of a person's life, like as what they eat, how much they attend school, or how much television they watch, won't alter their age.
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Question 4
When a neuron is not processing information:
O It is negatively charged
O It has no charge
O It is positively charged
O It is sometimes positively charged, sometimes negatively charged
When a neuron is not processing information It is negatively charged.
The correct option is A.
What is the role of neurons?Signals are sent and received by neurons, often referred to as nerve cells, from your brain. Although they share many characteristics with other cell types, neurons are physically and functionally distinct. Neurons are able to communicate electrical and chemical messages to other cells via specialised extensions known as axons.
Where are neurons found?The bulk of neurons in vertebrates are found in the central nervous system, however some are found in peripheral ganglia and many neurones are found in sensory organs like the retina and ear.
What is a neuron made of?Three basic components make up a neuron: a cell body, two extensions known as an axon, as well as a dendrite (3). The nucleus (2), which regulates the functions of the cell and houses its genetic material, is located inside the cell body. The axon resembles a tail and carries signals out of the cell.
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The complete question is -
When a neuron is not processing information:
A- It is negatively charged
B- It has no charge
C- It is positively charged
D- It is sometimes positively charged, sometimes negatively charged
which of the following are socioeconomic impacts of flooding
The socioeconomic impacts of flooding are decreased purchasing and production power.
What is Flooding?
This is referred to as the process in which water overflows and submerges the land which is usually dry. It leads to different types of negative consequences such as disruption of the ecosystem etc.
This occurrence leads to the displacement of people from their homes as a result of the place not being conducive enough for living due to the presence of water and other types of organisms in the home and can be prevented by providing appropriate drainage channels.
It leads to erosion in agriculture and the crops are destroyed which will lead to it decreasing production power. The purchasing power is also reduced as it threatens the livelihood of a vast majority of the affected individual.
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Only a small amount of the energy stored in food is available to the next organism in a food chain as a result of which of the following?
Only a small amount of the energy stored in food is available to the next organism in a food chain as a result of losses to the environment because 90% of energy is lost in the environment as heat.
what is the food chain?A food chain is described as a linear network of links in a food web starting from producer organisms and ending at an apex predator species, detritivores, or decomposer species.
A food chain also shows how organisms are related to each other by the food they eat.
We know that energy is passed up the food chain from one trophic level to the next but only about 10 percent of the total energy stored in organisms at one trophic level is actually transferred to organisms at the next trophic level. The reason for this is that he rest of the energy is used for metabolic processes or lost to the environment as heat
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Auxin-based weedkillers can be sprayed over an entire crop of narrow-leaved wheat in a field, but only broad-leaved weeds will be killed. The explanation for this is that...
The leaf absorbs less auxin due to its smaller leaf surface area. That is option C.
What is auxin?Auxin is a type of plant hormone that is used to enhance cell elongation, cell division, and cell differentiation in the roots of plants.
The Auxin-based weedkillers are those kind of weedkillers that contains the plant hormone, auxin. This is used for weed control in farm lands because of its ability to selectively destroy dicot weeds that are characterized with broad leaves.
Therefore, only broad-leaved weeds will be killed and not the narrow-leaved wheat in a field spread with the Auxin-based weedkillers.
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D. Variation existed in the traits of the fox population. Foxes with smaller ears and noses were able to stay warmer and were more likely to survive and reproduce to pass their genes on to offspring. Over time, the fox population showed a shift to smaller ears and noses.
The variations in the traits of fox population made them survive more in the cold climate.
What are variations?
Any difference in cells, individuals, or populations of organisms of any species that may be attributed to genetic differences (genotypic variation) or to the influence of environmental conditions on the manifestation of genetic potentials is referred to as variations.Variations in organisms leads to their better adaptations in the adverse climate.What are adaptations?
Adaptation is the feature of an organism's behavior or physical makeup that enhances the organism's capacity for survival in its environment.
Therefore, variations leads to adaptation of organisms which increases their survival rate. Also the genetic variations are passed on to next generations.
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How does the process of crossing over improve biodiversity of a species?
Answer:
it gives us genetic variation
crossing over is where both parent cells mix to form unidentical daughter cells right, therefore when both genes mix, the offspring gets the mixture of both parents and that is genetic variation and it is also how you get biodiversity
The human body produces 60 billion (60,000,000,000) new cells per day. How many cells does it produce in one hour?
Answer:
E.g. E. coli—20 min, so in an hour 1 cell would turn into 8.
Given that 60 billion cells are produced in a day in the human body, the number of cells that will be produced in an hour can be calculated by dividing the number of cells by the number of hours in a day. There would be approximately 2.5 billion cells produced in one hour.
How frequently are the cells in our body renewed?The human body regularly replaces its own cells. Every day, roughly 330 billion cells, or 1% of all our cells are replaced. The equivalent of a new you will have been replenished in 80 to 100 days with 30 trillion.
Each second approximately one million cells of the body die which means 1.2 kg of the cells are destroyed each day. All the cells in the body have a definite lifespan after which they are replenished.
The dead cells of the body are engulfed in a process called phagocytosis and are transferred to the lysosomes where they are degraded.
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Would the lac operon work if the repressor protein could not bind to lactose?
Answer: no
Explanation:
because binding of lactase to the repressor protein always the RNA polymerase to bind to promoter thus the structural genes could the production of enzyme lactase however if lactase doesnt bind the active repressor protein binds to the operator hindering the rna polymerase from binding on the promoter so there will be no genes for lactase production transcribed
Content Questions
1 According to the story, an
electrical circult is also called
A a circle
Ba wire
C a conductor
D a loop
Answer: It is a wire
Explanation:
41) Which of the following processes happens
during meiosis I?
A) Homologous chromosomes of a pair are
separated from each other.
B) The chromosome number per cell is conserved.
C) Sister chromatids are separated.
D) Four daughter cells are formed.
In meiosis I, homologous chromosomes of a pair are separated from each other. Option A.
What is meiosis?Meiosis is otherwise known as the division of sex cells or reductional division. It is a division in which diploid cells divide to produce haploid cells.
Meiosis occurs in 2 main stages:
Meiosis IMeiosis IIMeiosis I consists of prophase I, metaphase I, anaphase I, and telophase I. Meiosis II, on the other hand, consists of prophase II, metaphase II, anaphase II, and telophase II.
At the prophase I stage of meiosis I, chromatin materials thicken to form threads and homologous chromosomes pair up to form a tetrad. Non-sister chromatids then go ahead to exchange chromosomal segments in a process known as crossing over.
At metaphase I, paired homologous chromosomes line up at the center of the cell to form a metaphase plate. Spindle fibers engage each tetrad.
At anaphase I, homologous chromosomes of a pair are pulled apart by the shortening of the spindle fibers. Their journey to the poles is completed at telophase I. This effectively ends the journey of meiosis I before the cell proceeds to meiosis II.
In other words, the separation of homologous chromosomes of a pair happens during meiosis I.
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farmers are aware that chemical fertilizers cause damage to the soil, they still use it because of ?
Fertilizers maximize crop yield and increase plant production so, it is used by the farmers in the field.
What are Fertilizers?Fertilizers are the food for plants which provide nutrients to the plants for growth. These are the chemical substances which is applied to the crops to increase their yields and production. It can be of natural or synthetic origin which is applied to soil or to plant tissues to supply plant nutrients.
There are three types of fertilizers which provide the growth to the plants.
1. Nitrogen
2. Phosphorus
3. Potassium
These fertilizers can be used in the field
N, P and K Fertilizers.Micronutrient FertilizersRock PhosphateOrganic Manures.Thus, fertilizers maximize crop yield and increase plant production so, it is used by the farmers in the field.
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10. Which organisms are responsible for spreading the heartworm?
Infections with the Dirofilaria worm result in the disease known as dirofilariasis. One type, known as "heartworm disease" in dogs, is brought on by D. immitis.
How long can a dog skip a dose of heartworm medication?If a dose is missed, the majority of monthly heartworm medications provide at minimum 15 days of protection. This implies that even if you are just a week two late, your pet is probably still protected at that period and won't likely contract the infection.
Can people contract heartworms?Heartworms can occasionally be contracted after already being bitten by an anopheles mosquitoes. However, because humans are not heartworms' natural hosts, the larvae typically move to the arteries and lungs where they die before maturing into adult worms.
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If oxygen is present, then
glycolysis
goes too
Pyruvate from glycolysis gets delivered to the mitochondria if oxygen is available. The mitochondrial matrix, which is a region inside the cells, is where the pyruvate is transferred across membranes.
where are The mitochondrial matrix ?Three compartments are defined by the mitochondria's inner and outer membranes; each has a unique function and associated protein parts. The mitochondrial matrix is the final space, enclosed by the inner membrane.
What makes the mitochondrial matrix crucial?There are numerous uses for the mitochondrial matrix. The citric acid cycle is carried out there. This is a critical phase in the production of ATP, an energy molecule used in cell respiration. It has a component known as a nucleoid that houses the mitochondrial DNA.
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According to the cell theory cells from different organisms of function because they
Answer:
They are basic functional unit of life
Hemoglobin is a protein that carries oxygen in red blood cells. The hemoglobin molecules produced by some people have one specific amino acid that is different from the amino acid at that position in normal hemoglobin.
Which of the following is the most likely cause of this amino acid variation?
Group of answer choices
The hemoglobin gene contains a mutation.
Enzymes replace the amino acid once the hemoglobin is produced.
An additional amino acid is mistakenly inserted into the hemoglobin during translation.
An error occurs during the folding of the hemoglobin protein.
Answer:
My best guess is "The hemoglobin gene contains a mutation".
Explanation:
Sorry, I'm not an expert so bear with me!
One more common hemoglobin-related mutation is sickle-cell anemia. It occurs when the amino acid in hemoglobin is substituted from glutamate to valine. It is considered a mutation and is a direct swap from one specific amino acid (glutamate) to a different amino acid (valine) in the same position in the hemoglobin. So, considering that our example (sickle-cell anemia) fits the criteria of swapping one amino acid for another in the hemoglobin, is a mutation, and is passed down genetically (meaning that the hemoglobin gene would need to carry the mutation) it does look a bit like it fits your parameters!
Thus, as I understand it the hemoglobin gene carrying a mutation would make sense as the most likely cause of the amino acid variation.
Again, this is based on 10 minutes of googling. I hope this helps, but apologies if I'm incorrect!! Good luck :)
examples and non examples of a atom
Gavin has just woken up with a sudden fever that has spiked and has developed a rash in the last 24
hours that has turned into blisters that burst easily when touched. A sample was taken and sent off for
microbiological studies and grew a gram positive cocci, catalase positive, coagulase positive. What is the
name of this disease? What is the causative agent?
Gram-positive cocci, catalase positive, and coagulase positive is due to Staphylococcus aureus, which is the bacterium that causes bacterial tracheitis.
What is bacterial tracheitis?Bacterial tracheitis is a bacterial disease associated with pneumonia which is caused by Staphylococcus aureus bacteria and it has as its main symptom a high fever as well as difficulty for breathing, thereby it should be immediately treated in clinical settings.
Therefore, with this data, we can see that bacterial tracheitis is a life treating disease caused by the Staphylococcus aureus bacteria and it is associated with high fever symptoms.
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When excitatory neurotransmitters stimulate a single neuron, the neuron
A)more likely to produce an action potential
B)becomes less likely to produce an action potential
C)produces a stronger action potential
D)produces a weaker action potential
E)becomes more polarized
Answer:
A)
Explanation:
neurotransmitters have excitatory effects on the neuron. This means they increase the possibility of producing an action potential in the receiving neuron
When excitatory neurotransmitters stimulate a single neuron, the neuron more likely to produce an action potential. Thus option A is correct.
what is neurotransmitter ?
Neurotransmitters are nothing but the endogenous chemicals released by axon terminals of neurons into the synaptic junctions and its main role is to control the function of the nerve cell.
Some Imbalance of neurotransmitters such as serotonin, norepinephrine and dopamine mainly result in depression.When the level of glutamate neurotransmitter leads to changes in the level of Dopamine cause transition into psychosis.
Different neuro transmitters like enkephalin and serotonin are involved in analgesia system like pain suppression, When Serotonin are released causes local cord neurons and both presynaptic and postsynaptic inhibition of pain fibres.
neurotransmitters have excitatory and inhibitory effects on the neuron which means they increase or decrease the possibility of producing an action potential in the receiving neuron
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describe another situation in which the cell cycle short to allow rapid cell division before returning to normal
Overexpression of growth factors or the absence of suppressor proteins can lead to rapid cell division.
How the cell cycle allows cell division before returning to normal?The study of the cell cycle focuses on the apparatus that regulates the timing and frequency of DNA duplication and cell division during the mitotic (M) phase, the cell divides its duplicate DNA and cytoplasm to make two new cells. M phase involves two distinct division-linked processes such as mitosis and cytokinesis. A cell cycle is a series of events that takes place in a cell as it fattens and divides. A cell spends most of its time in what is called interphase, and through this time it grows, replicates its chromosomes, and prepares for cell division. The cell then leaves interphase, undergoes mitosis, and concluded its division.
So we can conclude that the division cycle of most cells comprises four processes such as cell growth and DNA replication.
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The production of ATP in the mitochondria
a. is anaerobic
b. takes place in the outer layer of mitochondria
c. takes place in eukaryotic and prokaryotic cells
d. is directly responsible for beginning the process of making ribosomal RNA
e: requires oxygen
Answer:
E: Requires oxygen
Explanation:
During respiration, glucose reacts with oxygen to form energy stored as ATP which can later be used by the cell.
the elements are located in certain groups and families based on their
The elements are located in certain groups and families based on their Similar chemical behavior because they have the same number of valence electrons and similar chemical properties.
Hope this helps :)
Which is an example of geographic isolation?
Responses
A Two groups of albatross live on separate islands but commonly cross from one island to the other.Two groups of albatross live on separate islands but commonly cross from one island to the other.
B A group of snakes is unable to cross a river and is separated from a group of snakes on the opposite side.A group of snakes is unable to cross a river and is separated from a group of snakes on the opposite side.
C A species of chipmunk becomes extinct because of a lack of food.A species of chipmunk becomes extinct because of a lack of food.
D One group of frogs mates in spring and another mates in fall, effectively isolating the two groups from breeding with each other.
A group of snakes that is unable to cross a river and is separated from a group of snakes on the opposite side is an example of the geographic isolation process (Option B).
What is the geographic isolation process?The geographic isolation process refers to all types of geographic barriers such as rivers that limit the gene flow between individuals of the same species.
Therefore, with this data, we can see that the geographic isolation process is associated with a limited gene flow in a population due to geographic barriers between individuals.
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What is the frequency of a wave if the velocity is 436.1 m/s and the
wavelength is 17.1 meters?
The frequency of a wave if the velocity is 436.1 m/s and the
wavelength is 17.1 meters is 25.5Hz
What is frequency ?
The quantity of waves that pass a set location in a predetermined period of time is known as frequency. Therefore, if a wave passes through in half a second, the frequency is 2 per second. The frequency is 100 times per hour if it takes 1/100 of an hour.
The temporal rate of change observed in oscillatory and periodic phenomena, such as mechanical vibrations, audio signals (sound), radio waves, and light, is specified by the frequency, an essential parameter in science and engineering.
v = f λ
v = velocity of the wave
f = frequency
λ = wavelength
f = v/ λ = 436.1/17.1 = 25.5 Hz
The frequency of a wave if the velocity is 436.1 m/s and the
wavelength is 17.1 meters is 25.5Hz
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4. What is the energy balance or energy budget in relation to the Sun and Earth?
Answer: Earth’s energy budget describes the balance between the radiant energy that reaches Earth from the sun and the energy that flows from Earth back out to space. Energy from the sun is mostly in the visible portion of the electromagnetic spectrum.
Explanation:
The energy balance between the earth and atmosphere is reached when the energy from the Sun equals the energy that is lost by the Earth back into space. The Earth maintains a steady average temperature and a steady climate in this way.
What energy balance in relation to the Sun and Earth?The balance between the solar energy that enters Earth and the energy that leaves Earth and travels back into space is known as the Earth's energy budget. The visible region of the electromagnetic spectrum is where the majority of the sun's energy is found.
With greenhouse gases in the atmosphere helping to keep the planet habitable, the temperature of the Earth is a delicate balancing act. Multiple mechanisms work together to maintain this temperature balance.
Therefore, The vast majority of the energy that the Earth receives comes from the Sun and is manifested as radiant energy.
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From a+b-2c take 3a+2b-4c
The value of the equation illustrated as a+b-2c take 3a+2b-4c is 2c - b.
What is an equation?An equation is the statement that illustrates the variables given. In this case, two or more components are taken into consideration to describe the scenario. It is vital to note that an equation is a mathematical statement which is made up of two expressions that are connected by an equal sign.
Based on the information, from a+b-2c we are to take away a+2b-4c.
This will be illustrated this:
(a + b - 2c) - (a+2b-4c)
Collect like terms
a + b - 2c - a - 2b + 4c
a - a + b - 2b - 2c + 4c
-b + 2c
= 2c - b
The value is 2c - b.
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Complete question
From a+b-2c take away a+2b-4c
D
Why is the second part of
photosynthesis called
"dark" reactions?
A. The reactions cause a dark
pigmentation of the plant.
B. The reactions don't require light to
be carried out. This answer
C. The reactions can't occur in the
dark.
D. The reactions can't occur in the
light.
Answer:
B. The reactions don't require light to be carried out.
Explanation:
Dark reaction is a light-independent process. This reaction occurs in the stroma of the chloroplast where it utilizes the products of the light reaction. Since this is not directly dependent on light, it is called as the dark reaction.
A chemical agent that makes holes in the inner membrane of the mitochondria would:
-stop the movement of electrons down the electron transport chain.
-stop oxidative phosphorylation
-stop the citric acid cycle
A chemical agent that makes holes in the inner membrane of the mitochondria would stop the movement of electrons down the electron transport chain.
What is Electron?This is referred to as a subatomic particle and it has a negative charge. It is involved in a chemical reaction when it is either gained, lost or shared thereby forming different types of bonds.
A chemical agent that makes holes in the inner membrane of the mitochondria would stop the movement of electrons down the electron transport chain because of the loss of energy which occurs when this is done thereby making option A the correct choice.
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What surrounds a fertilized
embryo that protects and
nourishes it?
A. a leaf
B. a seed coat this
C. a cone
Answer:
B that other person was just had a
weird answer
Explanation:
Answer: B, a seed coat
Explanation:
One out of every hundred people of the Hopi Indian tribe inherits the autosomal recessive disease Glucose-6-phosphate deficiency. How many people in the population of six million are carriers of this disease?
Following the Hardy-Weinberg equilibrium theory, in a population of six million people, 1,080,000 individuals are healthy and carriers (heterozygous) for the trait.
What is the Hardy Weinberg equilibrium?The Hardy-Weinberg equilibrium is a theory that states that populations in equilibrium get the same allelic and genotypic frequencies generation after generation.
These populations do not evolve. No evolutive forces are acting on them.
Assuming a diallelic gene, frequencies are
Allelic frequencies
p is the dominant allele frequencyq is the recessive allele frequencyGenotypic frequencies
p² is the frequency of the homozygous dominant individualsq² is the frequency of the homozygous recessive individuals2pq is the frequency of heterozygous individuals
In a population in equilibrium,
p + q = 1p² + 2pq + q² = 1We will consider these equations to solve the problem.
Glucose-6-phosphate deficiency is an autosomal recessive disease.One out of every hundred people of the affection. So this is the homozygous recessive genotypic frequency.Because we have the frequency of the homozygous recessive genotype, we can get the allelic frequency.
q² = 1/100 = 0.01q = √q² = √0.01 = 0.1Now, by clearing the equation p + q = 1, we can get the dominant allele frequency. And then, the frequency of the homozygous dominant genotype.
p = 1 - 0.1 = 0.9p² = 0.9² = 0.81Finally, we can get the frequency of the heterozygous genotype
2pq = 2 * 0.9 * 0.1 = 0.18The number of individuals with each phenotype in the population is,
0.81 * 6,000,000 = 4,860,000 individuals are healthy not carrier0.18 * 6,000,000 = 1,080,000 individuals are healthy carriers. 0.01 * 6,000,000 = 60,000 individuals have the disease.In a population of six million people, 1,080,000 individuals are healthy and carriers (heterozygous) for the trait.
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Why we can't live without sun?
Answer:
If the Sun disappeared or the Earth were flung out of its orbit the travel alone through interstellar space, then I think a small population of humans could survive (although we might need some advance warning).
While the surface of the Earth would freeze and become uninhabitable pretty quickly, there is enough internal heat in the core (left over from the formation of the Earth and generated by radioactive decay) that it would remain warm underground for billions of years. A small population (a few hundred people, maybe) could live in a suitably modified deep mine. With either nuclear power or geothermal power, they could power life support systems and grow food hydroponically. There are enough suitable deep mines for several of those survivor colonies.
Explanation:
