Student 2 is correct and the same group of worms should be used.
What is an experiment?An experiment is the process by which we establish cause and effect relationships in science. The control variable are those that must be kept the same in the experiment.
We know that the experiment will only be valid if the research is carried out with the same group of worms. If different groups of worms are used, other factors may account for the results obtained.
Thus student 2 is correct and the same group of worms should be used.
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The CRISPR-Cas9 system can be used to repair a mutant version of a gene in living cells. How does that process occur
The CRISPR-Cas9 system can be used to repair a mutation by recombination of the mutated sequence with a construct containing the normal gene.
What is the CRISPR-Cas9 system?The CRISPR-Cas9 system is a genome editing tool used to correct in vivo genetic mutations in a cell.
The CRISPR-Cas9 system contains a Cas protein that cuts DNA in a specific region of the genome according to a single guide RNA and thus produces desired genetic modifications.
In conclusion, the CRISPR-Cas9 system can be used to repair a mutation by recombination of the mutated sequence with a construct containing the normal gene.
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A forest fire destroys an area. A small population of trees and a large population of birds are both affected. Which
type of limiting factor causes this?
density dependent
density independent
population dependent
population independent
Answer:
Density Independent
Explanation:
Density independent is the factor that will affect a population no matter its size. Temperature, natural disasters, and oxygen levels all influence this.
The correct term to describe the type of limiting factor that causes the destruction of both the small population of trees and the large population of birds in this scenario is "density-independent." Density-independent factors are environmental factors or events that affect populations regardless of their size or density.
What is density-independent?Density-independent factors are environmental factors or events that affect populations regardless of their size or density. These factors exert their influence on population dynamics independently of population density. Density-independent factors include natural disasters like earthquakes, floods, hurricanes, and forest fires, as well as extreme weather events, habitat destruction, pollution, and certain diseases.
In this case, the forest fire is an example of a density-independent factor because it can impact both the tree population and bird population regardless of their respective sizes or densities.
Therefore, the correct answer is "density-independent."
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Photon energy, Wave Frequency and Wavelength are represented in the:
Photon energy, Wave Frequency, and Wavelength are represented in the Electromagnetic spectrum. Thus, the correct option is A.
What is Wavelength?Wavelength may be defined as the space between equivalent points (crests) in the contiguous cycles of a waveform movement propagated in space. It is represented as λ (lambda).
The wave frequency and wavelength are inversely related to one another, while photon energy is directly related to wave frequency, but inversely related to wavelength.
We study the association of all these terms in the unit of the electromagnetic spectrum.
Therefore, it is well described above.
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100 POINTS
e) The allele for small size is recessive, and the allele for normal size is dominant. The frequency for the normal-size allele is 0.72. What percentage of the rats are normal sized? (3 points)
Answer:
51.84%
Explanation:
p² + 2pq + q² = 1 and p + q = 1
p = frequency of the dominant allele in the population
q = frequency of the recessive allele in the population
p² = percentage of homozygous dominant individuals
q² = percentage of homozygous recessive individuals
2pq = percentage of heterozygous individuals
p = 0.72 => p² = 0.72² = 0.5184
=> Percentage of the rats are normal sized: 51.84%
A/An ____________________ reaction involves binding antigens to antibodies.
Answer:
its "A" reaction involves binding antigens to antibodiess
Explanation:
it is because An only comes before a vovle word
An immune reaction involves binding antigens to antibodies.
What is an immune reaction?An immune reaction is a type of reaction that take place in the immune system if the body which involve binding of antigens to the antibodies to prevent foreign invaders.
Therefore, An immune reaction involves binding antigens to antibodies.
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Convert this measurement, 6.410102 , from scientific notation to standard notation.
This measurement, 6.410102 , is from scientific notation to standard notation. The answer will be 6.41
What is Scientific notation?Scientific notation is a way of writing numbers in two parts:
Only the figures (with the decimal point after the first digit), followed by × 10 to the power that moves the decimal point where you should be (that is, showing how many positions the decimal point moves).
On the other hand, the standard notation is the one that is normally used for not-so-large numbers by putting one digit behind another.
Thus, The answer will be 6.41.
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I need help can anyone please help me?
The genotypes and phenotypes of the offspring is determined by the parents.
What will be the genotype and phenotype of the offspring of the cross?Assuming G is dominant over g, the offspring of the cross between the parents whose genotypes are Gg and Gg are given below:
Gg x Gg = GG, Gg, gg, and GgProbability of a gray offspring = 0.75
Probability of an albino offspring = 0.25
There are three possible genotypes; GG, gg, and Gg
There are two possible phenotypes; gray and albino
Probability of getting heterozygous offspring, Gg = 0.5
Probability of getting h0m0zygous offspring, GG and gg = 0.5
The color of the female is gray
The color of the male is gray
Assuming G is dominant over g, the offspring of the cross between the parents whose genotypes are gg and Gg are given below:
gg x Gg = Gg, Gg, gg, and ggProbability of a gray offspring = 0.5
Probability of an albino offspring = 0.5
There are two possible genotypes; Gg, and Gg
There are two possible phenotypes; gray and albino
Probability of getting heterozygous offspring, Gg = 0.5
Probability of getting h0m0zygous offspring, gg = 0.5
The color of the female is albino
The color of the male is gray
Therefore, the genotypes and phenotypes of the offspring is determined by the parents.
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How many of Earth's spheres does
the carbon cycle move through?
A. one
B. a few of the Earth's spheres
C. impossible to know
D. all of the Earth's spheres
The carbon cycle moves through virtually all of the earth's spheres.
Carbon cycle
There are 4 majors spheres of the earth:
AtmosphereGeosphere or LithosphereBiosphereHydrosphereThe carbon cycle moves through the air (atmosphere), oceans (hydrosphere), organisms (biosphere), and the soil (geosphere).
Thus, the carbon cycle moves through all the spheres of the earth.
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Answer: D. all of the Earth's spheres
Explanation:
Question 1 (Multiple Choice Worth 2 points)
(04.06 MC)
A population of mice thrive when grain and seed resources are plentiful. When food runs out, they compete with
one another for food and no longer produce offspring. This is an example of
O biotic potential
O group behavior
O individual behavior
O interspecific competition
individual behavior
Explanation:
if the mice are competing with each other that means that it's every man for himself.
The given example suggests the individual behavior of the mice because they change their behavior according to conditions.
How a population of mice affects the resources?In nature, organisms search for resources first, and if this availability is fulfilled, they reproduce themselves and increase the number of offsprings, but when the availability of resources are depleted they compete with each other.
The individual behavior of the mice in the population is defined as some mice fighting for the same resources and others mating with each other.
In the given question interspecific competition is not a right choice because it is the competition between the organism of two different species for the same resources.
Therefore, option C is correct.
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How are mitosis and meiosis similar?
Answer:
B
both process chromosomes are copied
A species with narrow niches that can survive in a small range of environmental conditions are
A. K-selected species
B. r-selected species
C. Generalist species
D. Specialist species
Answer:
D. Specialist Species
What is the advantage for species to be specialists, and how can they survive in the presence of opportunistic/generalist species?
In the setting of specialized habitats or unique situations, specialized species exist. When those conditions and surroundings change, they must adapt or go extinct, thus they must survive while they still exist.
When compared to generalists, they have the benefit of efficiency, which increases the likelihood of survival and, hence, reproduction within certain settings or situations. The generalists, on the other hand, have the benefit of being able to survive in a larger variety of circumstances and have a higher probability of doing so.
Cactuses, which are plants adapted to dry environments, are an example of specialization. More generalist plant species would typically outcompete cacti in most habitats on Earth, but very few of such species could endure the harsh conditions of a desert.
Extreme environmental conditions, competition for limited resources, and "evolutionary arms races" are some of the pressures that cause specialization. Cheetahs sprint quickly both because their prey moves quickly and because quicker cheetahs will be more effective hunters and more likely to procreate. The advantage of specialization is clear when seen from the standpoint of catching the next meal on a daily basis.
My key argument is that specialization's benefits must always be viewed in the context of the environment that generated the selective pressure that resulted in specialization. Although experts are specialists because they must be, their specializations put them in danger.
What are the main functions of red blood cells ?
Answer:
carrying oxygen
what kind of neurotransmitter is serotonin ?
According to the research, serotonin is an inhibitory type neurotransmitter that acts in the brain regulating mood, sleep.
What is serotonin?It is a neurotransmitter that is produced in the intestines, brain and blood platelets from the synthesis of tryptophan.
This neurotransmitter plays a relevant role in the inhibition and regulation of sleep, appetite, body temperature and anger, for example.
Therefore, we can conclude that according to the research, serotonin is an inhibitory type neurotransmitter that acts in the brain regulating mood, sleep.
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What happens during a claustrophobic attack?
It can trigger symptoms of anxiety ranging from mild sweating or trembling to fainting or a panic attack.
It can trigger symptoms of anxiety ranging from mild sweating or trembling to fainting or a panic attack.Common claustrophobia triggers include small rooms, elevators, closets, MRI scanners, airplanes, and other small or tight spaces.
Starch is digested in the small intestine. the small intestine contains many structures that absorb glucose.
In this investigation, you will observe the release of O2 and CO2 into the environment. Gas production by two types of organisms will serve as evidence of photosynthesis and cellular respiration in action. In part 1, you will vary the amount of sugar present and observe the effect on cellular respiration.
Anaerobic (without oxygen) and aerobic (with oxygen) cellular respiration are both possible (without oxygen).
During aerobic cellular respiration, glucose and oxygen combine to create ATP, which the cell can utilise. As byproducts, carbon dioxide and water are produced.
What are the three stages of cellular respiration?The Krebs cycle, oxidative phosphorylation, and glycolysis—an anaerobic process—are the three phases of aerobic cellular respiration.
All forms of cellular respiration begin with glycolysis, which is anaerobic and oxygen-free. The pathway will go on to the Krebs cycle and oxidative phosphorylation if oxygen is present. However, some species may engage in fermentation to continuously manufacture ATP in the absence of oxygen.
Total amount of ATP molecules generated during aerobic respiration from a single glucose molecule.
During glycolysis:
As 2ATP
From 2NADH 5ATP (oxidation phosphorylation)
In pyruvate oxidation;
From 2NADH 5ATP (oxidative phosphorylation)
Citric acid cycle;
ATP ATP (substrate level phosphorylation)
From 6NADH 15ATP (oxidative phosphyrlation)
From 2 FADH2 3ATP
Total Number ATP = 32 ATP
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Which factor can decrease the rate of a chemical reaction?
A low activation energy
B high pressure
C low temperature
D high concentration of enzyme
(c)Low Temperature of the Reactants can decrease the rate of a chemical reaction.
How temperature effects the rate of a chemical reaction
Chemical reactions typically occur faster at higher temperatures. Food can spoil quickly when left on the kitchen counter. However, the lower temperature inside of a refrigerator slows that process so that the same food remains fresh for days. An increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision.Thus decrease in the temperature of a reaction can help in decreasing the rate of a chemical reaction.Lower the temperature lower the chemical reaction rate.
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which two parts of the microscope cause magnification
Answer:
Enlargement or magnification of a specimen is the function of a two-lens system; the ocular lens is found in the eyepiece, and the objective lens is situated in a revolving nose-piece.
If the population of poison dart frogs in this rain forest community were to disappear, which of these populations would be most likely to increase?
A: Fruit bat
B: Sloth
C: Beetle
D: Strangler fig
Answer:
c
Explanation:
the beetles fall prey to the poison dart from so if they went extinct they wouldn't be a threat to the beetles population
tuberculosis, botulism, and tetanus are examples of diseases caused by rod-shaped bacteria known as ______________.
Bacilli is a rod shaped bacteria that cause diseases like tuberculosis, botulism, and tetanus.
What is Bacilli?Bacilli refer to a group of bacteria that is small, rod shaped and also a gram positive bacteria which causes diseases or infections on their host. They normally transmit diseases through infected food, water and animal bite.
Therefore, Bacilli is a rod shaped bacteria that cause diseases like tuberculosis, botulism, and tetanus.
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When cartilage is produced at the epiphyseal side of the metaphysis at the same rate as bone is deposited on the opposite side, bones.
Answer:
grow longer
Explanation:
In a long bone, the epiphyseal is the growing region. In young bones, bone formation occurs in a layer of hyaline cartilage. The epiphyseal plate forms cartilage on the epiphyseal end. Cartilage is calcified on the diaphyseal side, and the diaphysis lengthens.
It starts to grow longer
Herbivores have teeth designed for eating...
A. Plants only
B. Animals only
C. Plants and animals
Answer:
The answer is:
A. Plants only
Answer:
plants only
hope its helps
why is cooling of the plant important
Answer:
When temperatures are too high, energy systems (metabolic functions) slow, and growth and flowering slows or stops.
Explanation:
-cooling the plant and pumping water and minerals to the leaves for photosynthesis. Plants need to cool themselves for several reasons.
Which two sentences use coordinate adjectives?
A.The dark, musty cellar was full of mice.
B. We rode down a long dirt road on a sunny morning.
C. The dark-haired, hazel-eyed baby was gurgling happily.
D.Alan is wearing a pale blue sweater.
The two sentences which use coordinate adjectives include:
The dark, musty cellar was full of mice.The dark-haired, hazel-eyed baby was gurgling happily.What are Coordinate adjectives?These are words which describe the features of the same noun and is usually separated by a comma.
Options A and C have coordinate adjectives such as 'dark' and the 'dark-haired' respectively.
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What embyonic germ layer gives rise to liver?
Among the three germ layers, the endoderm (the most internal layer) is the one that gives rise to liver.
What is the endoderm?
Three embryonic layers are present in the blastoderm after segmentation. One of them is the endoderm, which is located in the interior most region of the embryo.
The endoderm is in charge of producing the Yolk sac, digestive and respiratory systems. It is involved in the formation of the thyroid glands, the thymus, pancreas, organs like the liver, and the structures are responsible for the urination.
The endoderm is the germ layer that gives rise to liver.
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Jake wants to enrich the nitrogen content of his soil through fixation which crop can he use for this purpose
Answer:
He can use beans since it is a legume and legumes have root nodules that facilitate nitrogen fixation
Choose all the answers that apply.
Asteroids:
only orbit planets
take millions of years to orbit the sun
are made of frozen gas and ice
sometimes come very close to Earth
only orbit the sun
Asteroids sometimes come very close to Earth and take millions of years to orbit the sun. Thus, the correct options are B and D.
What are Asteroids?Asteroids may be defined as nominal planets which can neither be classified either as a planet or as a comet that orbit the sun as well as planets.
An asteroid is a name we allocate to the enormous number of small bodies that orbit the sun, here in the internal solar system. These small bodies orbit planets as well as the sun and take a significant time in orbiting.
Therefore, the correct options are B and D.
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The ________ are the primary organs for filtration of the blood.
The primary organ used in the filtration of blood in the body is the kidney.
The kidney is a bean shaped organ that is about the size of a human fist. It is located at the bottom of the rib cage. There are two kidneys in the body, each kidney is located at each side of the spine in the body.
The kidney filters unwanted substances from the blood and pass them out of the body as urine. Blood is filtered in a part of the body known as glomerulus.
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For Labrador retrievers, black fur is dominant over yellow. Could a golden yellow
Labrador be obtained by crossing two black ones? Explain. (3 marks)
Answer:
it could
Explanation:
the recessive genes of the golden fur is still in the gene pool and maybe one black lab has the dominate black fur gene but has the golden recessive gene still accessible. so it could happen
Compare the structure and location of the human large intestine with those of the fetal pig.
The comparison between the structure and location of the human large intestine with those of the fetal pig are as described below.
What are the differences in the hearts?Fetal Pigs usually have large intestines that is located at their left side and is primarily a predominant spiral colon.
However, the human heart is different because it has an ascending colon on the right side that is connected to the descending colon on the left side of our body by the transverse colon.
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