Answer:
For a gene that is expressed in a dominant and recessive pattern, homozygous dominant and heterozygous organisms will look identical (that is, they will have different genotypes but the same phenotype), and the recessive allele will only be observed in homozygous recessive individuals.
Explanation
39. If a person's antigen-antibody response stimulates a massive secretion of histamine, the result would cause a severe reaction called
a. active immunity.
b. artificial immunity.
c. passive immunity.
If a person's antigen-antibody response stimulates a massive secretion of histamine, the severe reaction is called an allergic reaction.
The release of histamine in response to an antigen-antibody interaction is a characteristic feature of an allergic reaction. When the immune system recognizes an allergen (a substance that triggers an allergic response), it produces specific antibodies called immunoglobulin E (IgE). These antibodies bind to mast cells and basophils, which are immune cells that contain histamine.Upon subsequent exposure to the same allergen, the allergen binds to the IgE antibodies on mast cells and basophils, triggering the histamine release. Histamine causes blood vessels to dilate, smooth muscles to contract, and increased mucus production, leading to symptoms such as itching, swelling, hives, difficulty breathing, and in severe cases, anaphylaxis. Active immunity refers to the immune response produced by the person's immune system after exposure to an antigen. Artificial immunity involves the administration of vaccines or immunizations to stimulate an immune response. Passive immunity occurs when pre-formed antibodies are transferred from one individual to another (e.g., through breast milk or injection of immunoglobulins).
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a species of crab produces 1,000's of eggs at a time. these crabs will have a high mortality rate when weather patterns are severe. this crab species is an example of a _______.
A. selected species
B. ecosystem
C. a small population
The crab species described, which produces a large number of eggs but experiences high mortality rates during severe weather patterns, is an example of a small population. Option C is correct.
A small population refers to a relatively low number of individuals within a species that occupy a particular geographic area. In this case, despite the high reproductive output of the crab species (producing thousands of eggs), the mortality rate during severe weather patterns suggests that the population size remains small due to the high levels of mortality.
Severe weather patterns can negatively impact the survival and reproductive success of individuals within a population. If the mortality rate is high during such events, it can lead to a reduction in the population size. In this scenario, even though the species produces a large number of eggs, the overall population remains small due to the high mortality rate caused by severe weather conditions.
Hence, C. is the correct option.
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Maintaining the planet's biodiversity is important for all of the following reasons EXCEPT:
A. generating the natural water supply.
B. recycling important nutrients.
C. regulating the chemistry of the planet's atmosphere.
D. pollinating the crops humans depend on for food.
E. keeping public parks clean.
Maintaining the planet's biodiversity is important for all of the following reasons except keeping public parks clean. The correct answer is option E.
Biodiversity refers to the variety of living things found on Earth, biological diversity is also referred to as biodiversity. Biodiversity includes the many ecosystems, such as deserts, rainforests, and coral reefs, and the many different plant and animal species that live within them. Biodiversity has a number of advantages, some of which are mentioned below: Regulating the planet's atmosphere chemistry, recycling essential nutrients, and pollination of crops on which humans rely for sustenance.
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If an organism has two different alleles for a given trait (like attached and free earlobes), they are considered ____________, and in __________ traits we automatically know the genotype.
Two different alleles for a given trait are considered heterozygous and in dominant condition automatically know the genotype.
What are heterozygous traits?For recessive characteristics, we know the genotype automatically if an organism possesses two copies of the same allele.
The person is homozygous for the allele if the two alleles are the same. The person is heterozygous if the alleles are distinct from one another.
Therefore, an allele is one of a gene's two or more variants, for every gene, a person receives two alleles one from each parent.
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List 3 examples of nutritional and hormonal factors that bone development depends on
Answer:
Explanation:
Answer:
vitimins D,C, and b
Explanation:
When tornados strike forests, they can leave behind large gaps called blowdowns. In these gaps, most of the trees have been knocked over.
Fifteen years after a tornado had passed through a forest, scientists compared the characteristics of a blowdown to a similar area that the tornado had not impacted. The scientists measured the canopy cover, which is the percentage of ground area covered by trees. The canopy cover in the blowdown site was 45%, and the canopy cover in the non-impacted site was 80%. The table below shows the population densities of four forest species at the two sites.
Species Description Population Density
(number per 100 square feet)
Blowdown Non-Impacted Site
ash trees native hardwood 2 5
autumn olive non-native shrub 4 1
shagbark hickory native hardwood 1 3
Amur honeysuckle non-native shrub 5 2
Based on the information above, what is one way that a tornado impacts a forest community?
A.
It removes large hardwoods from the community, which decreases the habitat available to smaller plants.
B.
It increases light available on the forest floor, which can encourage the growth of non-native shrubs.
C.
It removes large hardwoods from the community, but these rapidly grow back to restore the forest.
D.
It decreases light available on the forest floor, which can encourage the growth of non-native shrubs.
Based on the information provided, one way that a tornado impacts a forest community is by increasing the amount of light available on the forest floor, which can encourage the growth of non-native shrubs.
The canopy cover in the blowdown site was only 45%, which is significantly lower than the 80% canopy cover in the non-impacted site. This means that there are fewer trees in the blowdown site, which allows more light to reach the forest floor. This increase in light can create favorable conditions for non-native shrubs, like autumn olive and Amur honeysuckle, to grow and thrive. These shrubs have higher population densities in the blowdown site compared to the non-impacted site. Additionally, the lower canopy cover may also make it more difficult for native hardwoods, like ash trees and shagbark hickory, to compete for resources with the non-native shrubs. Therefore, a tornado can have a significant impact on a forest community by altering the distribution and composition of plant species.
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A critical rewiew of the literature is necessary in nearly all research projects. True False QUESTION7 OLioctivity and parsimony ase toet rolated to the rigor of an invesigatoo? Truse False QUESTION B Scientific itwestigatoo is characterized by a good theoretical base and a sound methodological design. These charactetistics are both relsted to the of the invesigation Wist must be filled on the line? Rigor Precision and contidance. Otinectivity Farnemeriv.
1. True 2. True 3. Scientific investigation is characterized by a good theoretical base and a sound methodological design. These characteristics are both related to the Option a. Rigor
True - A critical review of the literature is necessary in nearly all research projects. It helps researchers understand the existing knowledge and gaps in the field, identify relevant theories and methodologies, and build upon previous studies.
True - Objectivity and parsimony are both related to the rigor of an investigation. Objectivity refers to the impartiality and lack of bias in conducting and interpreting the research, while parsimony refers to the principle of simplicity in explaining phenomena or choosing the most straightforward explanation. Both objectivity and parsimony contribute to the rigor of a scientific investigation.
a. Rigor - Scientific investigation is characterized by a good theoretical base and a sound methodological design. These characteristics are both related to the rigor of the investigation. Rigor refers to the thoroughness, precision, and reliability of the research process, including the theoretical underpinnings and the robustness of the methods employed.
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The correct question is:
1. A critical review of the literature is necessary in nearly all research projects.
True
False
2. Objectivity and parsimony are both related to the rigor of an investigation?
True
False
3. Scientific investigation is characterized by a good theoretical base and a sound methodological design. These characteristics are both related to the of the investigation What must be filled on the line?
a. Rigor
b. Precision and confidence.
c. Objectivity
d. Parsimony..
What does every living thing have to have? *
Chloroplast
Nucleus
DNA
Answer:
DNA
Explanation:
Answer:
Explanation:
Los cloroplastos son los orgánulos celulares que en los organismos eucariotas fotosintetizadores se van ocupando de la fotosíntesis. Están limitados por una envoltura formada por las dos membranas concéntricas y contienen muchas vesículas, los tilacoides, donde se encuentran organizados los pigmentos y demás moléculas que convierten la energía lumínica en energía química, como la clorofila.
El término cloroplastos sirve alternativamente para designar a cualquier plasto dedicado a la fotosíntesis, o específicamente a los plastos verdes propios de las algas verdes y las plantas. Aunque el reciente descubrimiento adiciona a más individuos en la lista, como lo es en el caso de Elysia chlorotica, que al digerir al alga Vaucheria litorea, adquiere los cloroplastos a sus tejidos, y gracias a esto, puede realizar la fotosíntesis.
When a big fish swims into an oncoming smaller fish and swallows it, the momentum of the two-fish system _______.
When a big fish swims into an oncoming smaller fish and swallows it, the momentum of the two-fish system remains the same.
In this case, the Law of conservation of momentum principle is used as when a big fish swims into a smaller fish and also swallows it, then there will be no change in the system as the momentum of the two-fish system remains the same.
But when the momentum of the big fish exists in the same condition but since the final momentum is to be true, there arises a combined mass of the big fish as well as the small fish, whereas the case of speed must be reduced.
The Law of conservation of momentum is important as it states that the total momentum that occurred in the initial state of the system remains the same as the momentum that exists in the final state of the system. This conservation principle helps to determine the initial and final velocity of a system that undergoes collision. This collision can be either elastic or inelastic. According to this theory, the momentum of the two fish systems remains here.
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In the periodic table ,helium,neon,and argon are commonly called noble gases because they;
A patient in the emergency room has been in cardiac arrest for three minutes before her heart is restarted. What is the most likely consequence of this episode?
Answer:
There will be few if any complications.
Explanation:
Just took the unit test review
Answer:
there will be few if any consequences
Explanation:
just finished unit test review, hope this helps <3
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two long-winged flies produce 49 short-winged and 149 long-winged offspring. what were the probable genotypes of the parents?
The most probable genotypes of the parents are both Ll, which means they each carried one dominant allele for long wings and one recessive allele for short wings.
In this scenario, we are examining the inheritance of wing length in flies. The terms you'll encounter in this answer are genotype, phenotype, homozygous, heterozygous, dominant, and recessive.
Step 1: Determine the phenotypes of the offspring. There are 49 short-winged and 149 long-winged offspring.
Step 2: Identify the dominant and recessive traits. Since long-winged offspring are more frequent, we can infer that long-winged (L) is the dominant trait, and short-winged (l) is the recessive trait.
Step 3: Determine the genotype of the recessive offspring. All short-winged offspring must have the genotype (ll), as they display the recessive trait.
Step 4: Calculate the expected ratio of offspring genotypes for different parent genotype combinations. A cross between two heterozygous parents (Ll x Ll) would produce offspring in a 3:1 ratio of long-winged to short-winged (75% long-winged, 25% short-winged).
Step 5: Compare the expected ratio to the observed ratio. In this case, there are 49 short-winged and 149 long-winged offspring, a ratio close to 3:1 (approximately 75.3% long-winged, 24.7% short-winged).
Based on this information, the probable genotypes of the parent flies are both heterozygous (Ll).
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which condition need to be in balance for cells to function
Answer:
homeostasis
Explanation:
In biology, homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems. This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range).
the electrical event that begins each heartbeat occurs at the sinoatrial (sa) node. true or false?
The statement "The electrical event that begins each heartbeat occurs at the sinoatrial (sa) node" is true.
The electrical event that initiates each heartbeat occurs at the sinoatrial (SA) node, which is located in the right atrium of the heart. The SA node acts as the natural pacemaker of the heart, generating electrical impulses that spread through the atria, causing them to contract.
This electrical signal then travels to the atrioventricular (AV) node, which is responsible for conducting the electrical impulse to the ventricles, resulting in their contraction. The coordinated contraction of the atria and ventricles allows for the pumping of blood throughout the body.
Therefore, the SA node plays a crucial role in initiating the electrical activity that regulates the heartbeat.
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explain how microbes are (or become) pathogenic
Answer: Microbes that cause disease are called pathogens. It is important to remember that: A pathogen is a micro-organism that has the potential to cause disease. An infection is the invasion and multiplication of pathogenic microbes in an individual or population. Pathogenicity is defined by the capacity of a microbe to cause damage in a (susceptible) host. Virulence is defined as the relative capacity of a microbe to cause damage in a host. brainliest???
Explanation:
The best type of graph to use when comparing how one variable effects another
bar graph
line raph
pie chart
all of the above
Answer:
Bar Graph is the answer..
Bar graphs are used to compare things between different groups or to track changes over time. However, when trying to measure change over time, bar graphs are best when the changes are larger..
Explanation:
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what was the problem of Reid's experiment ?
Answer:
Redi went on to demonstrate that dead maggots or flies would not generate new flies when placed on rotting meat in a sealed jar, whereas live maggots or flies would. This disproved both the existence of some essential component in once-living organisms, and the necessity of fresh air to generate life.
Explanation:
The carrying capacity is the maximum number of individual organisms that ____.
The carrying capacity is the maximum number of individual organisms that a specific environment can support.
An environment can only support a limited number of people.Carrying capacity refers to the maximum population size that an ecosystem can support without depleting the natural resources available at a time. Carrying capacity is determined by limiting variables like non-living(abiotic) factors and living(biotic) factors.The number of creatures that may live in an environment is determined by the availability of abiotic (eg. water, oxygen, and natural habitat) and biotic (eg. food, decomposers like fungi) elements. Generally in an ecosystem, a species' population will rise until it achieves its carrying capacity. The population size then stays fairly constant to check over the sustainable development.Sustainable development is defined as development that meets current needs without impacting future generations' ability to meet their requirements.Resources may be fully exhausted if the population exceeds the carrying capacity for an extended length of time. Natural disasters(flood, drought, volcanic eruption etc.) and Anthropogenic activities(human interventions) also have the potential to reduce or raise carrying capacity.To learn more about the carrying capacity, refer:-
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Distinguish between birthdate and death rate
Answer:
Birthdate vs death rate
Explanation:
Birthdate is the day someone was born. Death rate is the amount of people that died in a period of time
Answer:
The birth rate of a country, community, etc., refers to the number of births that occur per thousand people, per year. Similarly, the death rate refers to the number of deaths per thousand people, per year.
Explanation:
A plant was not able to go through the process of photosynthesis due to
not enough water being available. What will happen next?
Answer:
Explanation:
the plant will die
Answer:
The plant will not be able to survive if it doesn't have enough water to go through the process of photosynthesis.
Explanation:
refer to animation: sequence assembly. how is the order of dna fragments determined to obtain the sequence of the entire genome?
The order of DNA fragments in the process of sequencing a genome is determined by a technique called "shotgun sequencing". In this technique, the DNA of an organism is first broken into small fragments. These fragments are then cloned and sequenced separately. Once all of the fragments have been sequenced, they are assembled by overlapping the sequences that match.
To obtain the sequence of the entire genome, the process of assembling the fragments involves using specialized software that takes into account the overlapping regions between fragments. The software uses algorithms to piece together the overlapping regions, ultimately reconstructing the entire genome sequence.
Overall, the process of determining the order of DNA fragments in sequencing a genome involves the use of cutting-edge technology and advanced computational methods to assemble the fragments into a complete sequence.
Hi! In the process of sequence assembly, the order of DNA fragments is determined to obtain the entire genome sequence using two main approaches: the Overlap-Layout-Consensus (OLC) method and the De Bruijn Graph method.
In the OLC method, overlaps between DNA fragments (also called reads) are identified. These overlaps help to construct a layout that represents the relative positions of the fragments in the genome. Finally, a consensus sequence is derived, representing the most likely genome sequence based on the assembled fragments.
The De Bruijn Graph method, on the other hand, involves breaking the DNA fragments into smaller subsequences called k-mers. These k-mers are then represented as nodes in a graph, with directed edges connecting overlapping k-mers. The final genome sequence is obtained by finding an Eulerian path through the graph, which represents the most probable order of the DNA fragments in the genome.
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How does water cause frost wedging?
A
Water attracts lightning, which breaks apart huge boulders into many smaller pieces.
B
Water carries sediment to large rocks, causing them to rub against each other.
C
Water freezes and thaws inside rock cracks, causing them to widen and then split.
D
Water slowly wears down a rock’s sharp edges, leaving behind a smooth surface.
Answer:
C. Water freezes and thaws inside rock cracks, causing them to widen and then split.
Explanation:
When water gets in the crack at the bottom and freezes, frost wedging occurs.
Frost wedging happens when water gets in crack, freezes, and expands. This process breaks rocks apart. When this process is repeated, cracks in rocks get bigger and bigger (see diagram below) and may fracture, or break, the rock.
Si fuimos creados para la felicidad ¿Por qué la mayoría de las personas viven sus vidas de manera infeliz? Escribe por las menos 3 razones
Answer: esto se deve a la monotonia por ejemplo el trabajo hacer eso todos los dias es estresante
tambien puede ser devido a problemas personales por ejemplo un divorcio la muerte de algun familiar.
o pueden ser las condiciones de vida que se poseen
Explanation:
why is it that all neurons in a healthy adult brain have made appropriate connections?
In a healthy adult brain, neurons have made appropriate connections because of a process called synaptic pruning.
During early development, neurons create many synaptic connections with other neurons. Throughout maturation, the brain strengthens important connections and eliminates weaker or less relevant ones. This process is guided by neuronal activity and input from the environment, ensuring that only the most efficient and functional connections remain.
In summary, all neurons in a healthy adult brain have made appropriate connections due to the process of synaptic pruning, which strengthens important connections and eliminates weaker ones based on neuronal activity and environmental input. This results in a more efficient and functional network of neurons.
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why is there no contact metamorphism indicated between rock unit L and rock unit F?
Contact metamorphism occurs when rocks are heated by magma, and they usually occur around igneous intrusions. This metamorphic process typically occurs in areas of high heat and pressure due to the intrusion of magma, which causes chemical and physical changes in surrounding rocks.
The metamorphic effects of contact metamorphism can be quite dramatic, causing minerals to recrystallize, and rocks to become more resistant to erosion. In the given scenario, there is no contact metamorphism indicated between rock unit L and rock unit F because there was no magma intrusion in between them.
Magma would need to intrude between the two rock units for contact metamorphism to occur. The presence of the fault between rock unit L and rock unit F prevents contact metamorphism from taking place. The fault would have acted as a barrier to the heat from the magma, thereby preventing the rocks on the other side from being altered by contact metamorphism.
Metamorphic rocks are classified into two types based on the physical conditions of metamorphism: regional metamorphism and contact metamorphism. Regional metamorphism is characterized by the extreme pressure and heat that cause rocks to recrystallize over large areas.
Contact metamorphism, on the other hand, occurs when magma or lava comes in contact with existing rock, resulting in localized changes. Contact metamorphism does not occur over large areas like regional metamorphism.
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how could you use the diversity of metabolic pathways that produce the same or similar products to critique this argument?
A pathway exists and accomplishes some function.
As organisms with cellular enzymes has mutations that allow new enzymes to arise.
The pathway is altered in a beneficial way by new enzymes.
Gradually changing metabolic pathways are involved.
Metabolic pathways and biochemical pathways are interchangeable terms. To keep the organism alive and in a state of equilibrium, several pathways are required.
Therefore, these pathways essentially consist of a sequence of enzyme-activated reactions in which the outcome of one reaction serves as the substrate for the subsequent process.
These routes have many steps, which enables control systems to activate one pathway while inhibiting another.
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What type of growth pattern will the bats exhibit
Bats typically exhibit sigmoid or S-shaped growth curves, which are characteristic of many populations of living organisms.
What is the type of growth pattern in bats?In the early stages of growth, the bat population is small and has a slow rate of increase. As the population grows, it enters a period of rapid growth, where the rate of increase is high.
Eventually, the growth rate begins to slow down as the population approaches its carrying capacity, which is the maximum number of individuals that can be sustained by the available resources. At this point, the population stabilizes at its carrying capacity, and growth stops or becomes very slow.
This pattern of growth is common in many animal populations and is influenced by factors such as resource availability, predation, disease, and other environmental factors
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What is solar day A the time for the stars to complete one revolution B the time for the moon to complete one rotation C the time for earth to complete one rotation D the time for the sun to complete one revolution
Answer:
the answer is C
explain the speed–accuracy trade-off in the skill of catching with adults over the age of 65. what would coincidence-anticipation research tell us about catching in older adults?
The speed-accuracy trade-off theory states that individuals need to decide how much emphasis to place on the speed or accuracy of a movement to achieve a particular goal.
The speed-accuracy trade-off theory states that individuals need to decide how much emphasis to place on the speed or accuracy of a movement to achieve a particular goal. With the task of catching, it is important to find the balance between speed and accuracy to successfully catch an object, but this may change based on factors such as age. In adults over the age of 65, catching may become more challenging due to changes in sensory processing and motor control, which can affect the speed-accuracy trade-off.
Coincidence-anticipation research is a type of research that focuses on the ability to predict the future location of a moving object and the ability to respond accordingly. With older adults, research has shown that their ability to accurately anticipate the trajectory of a moving object may decline, making catching more challenging. This decline is attributed to changes in cognitive processing, such as slowed reaction times and difficulty with visual tracking.
Furthermore, research has shown that older adults may rely more on visual information rather than proprioceptive feedback (internal awareness of the body's position and movement) when catching, which can also affect the speed-accuracy trade-off. In summary, the speed-accuracy trade-off theory applies to catching in older adults, but changes in sensory and cognitive processing can make it more challenging to achieve the right balance. Coincidence-anticipation research can help identify these changes and inform interventions to improve catching ability in older adults.
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Which of the following conditions will result in the rabbit population pictured in the graph below?A graph with Years on the x-axis from 3 to 6 and Rabbits on the y-axis from 0 to 400, by hundreds. The line begins at (0, 200), increases to around 300 and then down to 200 again each year consistently.a.ample land, cold springsb.little land, normal conditionsc.moderate land, hot summersd.ample land, harsh winters
Without a proper context is quite vague, nonetheless, we are seeing a cyclin behavior, at the end of each year we see a drastic drop in population numbers so probably we are seeing the effect of seasonal changes, now by the type of habitat of rabbits and the harshness of certain seasons is more logical to assume that we are seeing the effect of winters, so the correct answer is option d.