Answer:
The process of infecting or the state of being infected
Explanation:
Of these answer choices, which could be the cause of Down syndrome for an offspring?
A. The mother's egg contained 22 chromosomes.
B. The father's sperm contained 23 chromosomes.
C. The mother's egg and the father's sperm each contained 23 chromosomes.
D. The father's sperm contained 23 chromosomes and the mother's egg contained 24 chromosomes.
Answer: D). The father's sperm contained 23 chromosomes and the mother's egg contained 24 chromosomes.
Explanation: Down syndrome is a chromosomal disorder caused by an extra chromosome. Each gamete (sperm cells and egg cells) contains 23 chromosomes. During fertilization, a sperm cell with 23 chromosomes fuses with an egg with 23 chromosomes to form a zygote with 46 chromosomes. A normal child has 46 chromosomes but a child with down syndrome has 47 chromosomes. A child with down syndrome has an extra chromosome usually inherited from the mother, that is the mother's egg contains 24 chromosomes instead of 23 chromosomes.
How do protons contribute towards making ATP?...
Answer: Protons contribute towards making ATP by producing proton-motive force that provides energy for ATP synthesis.
Explanation: In the respiratory chain, the transfer of electrons from one complex to another is accompanied by pumping of protons out of the matrix. This creates a difference in proton concentration and separation of charge across the mitochondrial inner membrane. The electrochemical energy inherent in this difference in proton concentration called proton-motive force is used to drive ATP synthesis as protons flow back passively into the matrix through a proton pore.
Ground tissue is found in a plant’s.... A. Stems only B. Stems and leaves only C. Roots and stems only D. Roots, stems, and leaves
Answer:
Option D. Roots, stems, and leaves.
Explanation:
Ground tissue is a type of which are present in roots, stem, seed and leaves etc. Ground tissue is responsible for the production of food materials. These tissues also helps in the storage of food substance that are prepared in the leaves and gives support to the plant. Ground tissue is formed from parenchyma, collenchyma, and sclerenchyma.
pathogens are recognized by what
Answer:
macrophages and dendritic cells. if i recall correctly.
Explanation:
Many different immune cells, such as macrophages and dendrictic cells.
Cold sores are caused by virus.
Describe why a virus such as the cold sore virus cannot be cultured on a nutrient agar plate
Answer:
Viruses in general require a living host cell for replication. So cold sore virus requires a livng host to replicate. Infected host cells can be cultured and grown, and then the growth medium can be harvested as a source of virus as compared to bacteria that can be cultured in a nutrient agar plate. So ther virus must have a host cell like bacteria, plant or animal in which to live and make more viruses. Outside of a host cell, viruses cannot function.
The cold sore virus cannot be cultured on a nutrient agar plate because viruses require a host cell to reproduce. Agar plates provide nutrients which viruses cannot utilize for growth.
Explanation:A virus, such as the one that causes cold sores, cannot be cultured on a nutrient agar plate due to the nature of its life cycle. Viruses are unique in the microscopic world because they cannot reproduce outside of a host cell. They lack the cellular components necessary for independent life and replication.
When performing culture techniques, bacteria and fungi (which are self-sufficient and can reproduce on their own) can be cultured on nutrient agar because they use the nutrients in the agar to grow and multiply. However, a virus requires the inside of a host cell, taking over the cell's machinery to produce more virus particles. The cold sore virus, specifically, replicates inside human cells, which means it cannot utilize a nutrient agar plate for growth.
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what is the magnitude force and direction of the object
science help pls !! will reward
Answer:
C. Selective breeding
Explanation:
The text says that people selected the best ones to breed together to get what they want. This is called selective breeding.
The answer is C: Selective breeding
a stem cell in an animal divided by mitosis. which statement is true about the two daughter cell
Answer:
They are identical because, in the process of mitosis, the single cell divides into 2 and remains the same along with identical characteristics.
Explanation:
the ability to move or cause changes in matter
Explanation:
Energy is defined in science as the ability to move matter or change matter in some other way. Energy can also be defined as the ability to do work, which means using force to move an object over a distance.
The ability to move or cause changes in matter is referred to as energy.
Explanation:
Energy is a fundamental concept in physics and the natural sciences. It is the capacity or ability to do work or bring about changes in the state or motion of matter. Energy exists in various forms, and these forms can be converted from one to another. Some of the common forms of energy include:
Kinetic Energy: This is the energy of motion. Any object in motion possesses kinetic energy, and the amount of kinetic energy depends on the mass and velocity of the object.Potential Energy: This is energy stored in an object due to its position or state. For example, an object raised above the ground has gravitational potential energy, while a compressed spring has elastic potential energy.Thermal Energy: Thermal energy is the energy associated with the temperature of an object. It is a measure of the total kinetic energy of the particles within a substance.Chemical Energy: This is the energy stored in the bonds between atoms and molecules. It can be released during chemical reactions.Electrical Energy: Electrical energy is the movement of electrons through a conductor and is harnessed to power various devices and systems.Radiant Energy: Radiant energy includes electromagnetic waves such as light, heat, and other forms of radiation.Energy is a fundamental concept because it underlies all physical processes and is conserved in closed systems. It plays a crucial role in our daily lives, powering everything from machines and appliances to biological processes within living organisms.
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Why is the pituitary gland called the master gland?
It is the largest gland in the body.
It regulates the work of many glands in the body.
It helps the brain master higher-level thinking processes.
It controls the heart, which is the master pumping organ in the body.
Answer:
Pituitary gland is known as the master gland because it influences the functioning of other glands like thyroid, testes, ovary etc for it's functioning as endocrine gland.
Therefore it regulates the work of many glands in the body.
hope this helps.......
The pituitary gland called the master gland as it regulates the work of many glands in the body.
What is pituitary gland?It is the master gland of endocrine glands. It also controls hormones .
The pituitary gland called the master gland because It regulates the work of many glands in the body.It also controls several hormones of endocrine.
Thus well explained.
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-6. Place the following words into the illustration below: gametes, sporophyte, gametophyte,
and zygote. Explain each step in the cycle, and how the terms are related.
1. Gametophyte
2. Gametes
3. Zygote
4. Sporophyte
Explanation:The life cycle of plants are very interesting in nature. The plant body that we see is the sporophyte. The sporophyte plant has the flowers which contain the Pollen mother cell and embryo sac which are the gametophytes.
These gametophytes produce the cells that are gametes which are pollen and ovule respectively. These grains fuse to form fertilization and zygote. The zygote marks the starting of the sporophytic generation.
The sporophytic generation is diploid and the gametophytic generation is haploid in nature.
How many recessive genes does a individual need in order to show the recessive trait?
Answer: Two recessive genes
Explanation: Every trait is controlled by at least a pair of gene, one inherited from the mother and the other inherited from the father. A recessive gene is a gene whose effect is masked by a dominant gene. A recessive gene lacks the ability to express itself in the presence of a dominant gene. For a recessive gene to manifest outwardly, it must occur in a homozygous state that is the individual must inherit two copies of the gene from its parents, one from the mother and one from the father.
Post - lab question
1. Which members of the Smith family can donate to John?
Answer: provide more info
Explanation:
I need more info
Which of the following statements is true of all organisms in every environment?
O A.
They must compete for essential resources.
B.
They avoid interaction as much as possible.
C.
They are able to produce their own food.
D.
They must consume other organisms for energy
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Answer:
A. They must compete for essential resources.
Explanation:
The true statement about all organisms in every environment is that they must compete for essential resources. This competition for resources like food, water, or space is an integral part of natural selection and affects all organisms' ability to survive and reproduce.
The correct answer to the question, which asks about the universal trait of all organisms in every environment, is A. They must compete for essential resources. This is a foundational concept in ecology, reflecting the competition that occurs when multiple organisms vie for the same resources such as food, water, or space. This dynamic is a driving force behind the process of natural selection, as it influences which organisms thrive and which do not.
All organisms engage in the process of gathering energy from their surroundings to fuel their cellular functions, such as converting substances to ATP (adenosine triphosphate). However, not all organisms can produce their own food; this ability is limited to autotrophs like plants. Heterotrophs, on the other hand, must consume other organisms to obtain the energy they need to survive. This necessitates that they engage in competition for food resources with other organisms.
Owing to the limited availability of resources, organisms engage in both intraspecific (within the same species) and interspecific (between different species) competition. This is crucial for their growth, reproducing, and maintaining organization, all of which are part of exchanging matter with the environment.
I need help in bio it’s due tomorrow pleaseee
Answer:
1. A
2. I
3. Sorry I am not sure.
4. I
Explanation:
1. ATP has 3 phosphate groups, T = tri aka three.
2. ATP has 3 phosphate groups and turns into ADP which as two phosphate groups because when it loses one phosphate, it releases energy.
3.
4. Passive transport does not require energy because when it passes through the cell membrane it is going with the concentration, it goes from high to low concentration. Active Transport requires energy because it is going against the concentration, low to high, so it needs energy to go from low to high concentration.
Answer:
1) A
2) I
3) C
4) I
Explanation: ATP is adenosine triphosphate. It has three phosphate groups attached to the 5th carbon atom of the ribose sugar. ATP contains adenine (a base), a ribose sugar and three phosphate groups.
ATP break down is an exergonic reaction in which the terminal phosphate group of ATP is cleaved to produce ADP and inorganic phosphate group (Pi) with the concomitant release of energy.
Cellular respiration involves the break down of a glucose molecules in the presence of oxygen to produce carbon dioxide, water as by-products with release of energy in form of ATP. The chemical energy in form of ATP released in cellular respiration is used to drive other cellular functions.
Passive transport is a process by which polar compounds and ions move across membrane through an alternative path created by membrane proteins. In passive transport, the transported species always move down its electrochemical gradient and does not require ATP expenditure. This means that passive transport is not coupled to ATP breakdown or does not occur at the expense of ATP hence the name passive transport. It is different from active transport which is coupled to ATP breakdown.
assess the importance of variations to natural selection
Variations are fundamental to natural selection, serving as the material on which natural selection acts to drive evolution. Studies, such as those on Darwin's finches, highlight how environmental changes can lead to evolutionary shifts within short periods, emphasizing the critical role of genetic variance in population evolution.
Explanation:Variations within a population are crucial for the process of natural selection, as they provide the raw material on which natural selection can act. Without genetic variability, there would be no differential survival and reproduction among individuals in response to changing environmental pressures. This lack of variation would halt evolution, as there would be no traits for natural selection to favor or disfavor.
Genetic variations arise from mutations, gene flow, and sexual reproduction, and are a prerequisite for adaptability and survival of species. The iconic studies of Darwin’s finches by Peter and Rosemary Grant showcase how environmental changes, such as fluctuations in rainfall and hence food availability, can lead to measurable evolutionary changes within relatively short time spans. This underscores the importance of genetic variance in evolution of populations.
Moreover, human populations exemplify the breadth of genetic variation, affected by a complex interplay of genetic drift, mutation, and natural selection, leading to a diverse range of phenotypes. This variation is not just superficial but plays a critical role in how populations adapt to their environments over time. Thus, understanding the mechanisms of variation is essential for comprehending the broader processes of evolution and biodiversity.
Final answer:
Variations are essential for the natural selection process, providing the genetic 'raw material' that can lead to adaptations in response to environmental changes, as exemplified by the variation in beak sizes among Darwin's finches studied by the Grants.
Explanation:
The Importance of Variations to Natural Selection
Variations within a species are crucial for natural selection, a process central to evolution. Without genetic variance, natural selection could not differentiate between individuals, and evolutionary adaptation would be stunted. Genetic variations arise from mutations and the recombination of genes through sexual reproduction. These variations in genes lead to different phenotypes (observable characteristics) within a population, providing the 'raw material' for natural selection to act upon. For example, consider the famous studies of Darwin's finches on the Galapagos Islands by Peter and Rosemary Grant. They detailed how climatic changes affected food availability, which in turn selected for different beak sizes in the finches. This is a clear demonstration of how variations in traits—such as beak size, influenced by genetic factors—can lead to differential survival and reproduction, driving the evolution of populations.
An examination of the beak sizes of the finch population shows a range of sizes, not just one. The diversity in beak size is indicative of genetic variability, which provided a spectrum of advantages and disadvantages that natural selection could act on following environmental changes. This supports the concept that genetic variations are essential for populations to adapt and evolve over time. In summary, variation is the cornerstone of evolutionary processes, and without it, populations would lack the necessary diversity to respond to changing environmental pressures, and evolution by natural selection would not occur.
Which of the following best describes surface tension?
A. a measure of the amount of heat that can be absorbed by a substance
a measure of the ability of one substance to dissolve another to form a solution
B.
C.
a measure of the intermolecular forces that cause two identical substances to repel one another
D.
a measure of the intermolecular forces at the surface of a liquid that determines how easily the surface can be broker
E.
a measure of the intermolecular forces that cause two different substances to attract one another
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The statement best describes surface tension is a measure of the intermolecular forces that cause two different substances to attract one another.
What do you mean by surface tension?Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible. Surface tension is what allows objects with a higher density than water such as razor blades and insects to float on a water surface without becoming even partly submerged.
The surface tension determines the behavior of liquids in a number of processes and phenomena: Wetting and wettability: The wetting of a solid by a liquid depends, among other things, on the surface tension.
An example of such an organism is the water strider, which can run across the surface of water, due to the intermolecular forces of the molecules, and the force of the strider which is distributed to its legs.
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Alexis's school class will be traveling to the city library next week to collect information on specific topics that each student has chosen to learn about. Alexis wants to learn about the cheetah, but she still needs to choose a hypothesis for her research. Which of these would work as a hypothesis for Alexis?
Answer:
The cheetah can run faster than the tiger but not as fast as the jaguar.
Why does the deletion of a single nucleotide in a gene often results in a very defective protein ?
Answer: The deletion of a single nucleotide in a gene often results in a very defective protein because it changes the reading frame of the DNA which leads to the production of a protein with amino acid sequence that is different from the original protein.
Explanation: When a single nucleotide is deleted in a gene, it results in a frameshift mutation. A frameshift mutation is a type of mutation caused by either insertion or deletion of a nucleotide in a DNA sequence which changes the reading frame of a DNA sequence. During protein synthesis, DNA is first copied into an mRNA and the mRNA is used to make a protein. mRNA sequence is read in triplet of nucleotides known as codons which code for specific amino acids. When a single nucleotide is deleted from a DNA sequence, the mRNA that will be produced will have an altered reading frame which leads to the addition of wrong amino acid and the entire amino acid sequence after the point of mutation will be incorrect. This results in a completely different protein from the original thus causing a defect in protein function.
A single nucleotide deletion can cause a frameshift mutation in a gene, altering the original amino acid sequence and drastically affecting the structure and function of the resulting protein.
Explanation:The deletion of a single nucleotide in a gene often results in a very defective protein because it can cause a frameshift mutation. This type of mutation essentially throws off the entire reading frame for a gene by either adding or subtracting a nucleotide that is not a multiple of three (since ribosomes read mRNA in triplet codons), which changes every single amino acid after the point of mutation.
As an example, consider a hemoglobin molecule which is made up of two alpha and two beta chains, each consisting of about 150 amino acids. A single base change, or point mutation, can cause such a significant structural difference in the resulting protein as to substantially decrease life expectancy in conditions like sickle cell anemia.
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Does every organisms on earth carry out Mitosis?
Answer:
No because prokaryotic does not cells such as bactiers
Explanation:
because of that not all cells have mitosis
What is the difference between a paleontologist and a geologist?
Answer:
its simple!
Explanation:A Geologist is someone that studies the earth! like rocks and dirt!
A Paleontologist is someone who studies old bones and fossiles that are IN the dirt!
What is the most common and powerful agent of erosion?
A.) wind
B.) ice
C.) water
D.) animal behavior
C.) WATER IS THE ANSWER!!
Answer:
c water is the answer
Explanation:
yeah
Water is the most common and powerful agent of erosion. Therefore, option (C) is correct.
What is erosion?Erosion is the process by which natural forces such as wind, water, ice, and gravity wear away and shape the Earth's surface. Water is the most common and powerful agent of erosion, as it has the ability to erode and shape the landscape in a variety of ways. Water erosion can occur through the action of flowing water, such as in rivers and streams, or through the action of waves and tides in the ocean. Water can also cause erosion through the process of groundwater seepage, in which water flows underground and erodes the soil and rock below the surface.
Water erosion can have a significant impact on the landscape, shaping valleys, carving out canyons, and creating features such as waterfalls and gorges. It is also a major factor in soil erosion, which can have negative impacts on agriculture and the environment.
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A calcium bromide compound is represented by which formula?
Ca2Br
Ca2Br2
CaBr
CaBr2
Answer:
Calcium Bromide is represented by the formula CaBr2.
Answer:
CaBr2
Explanation:
i just got it right on usa test prep
Definition: This is the regular progression of species replacement that occurs after a disturbance, such as natural disaster, or during the establishment of a new habitat.
Example: primary and secondary
Answer:
Ecological succession
Explanation:
Ecological succession can be described as a series of processes by which a climax community arises gradually in an area where there was no form of life before or the previous ecosystem was destroyed bu disasters such as fire, flood etc.
Ecological succession is of two types:
Primary succession occurs on lands where there was no form of life before. On the other hand, secondary succession occurs in lands where there was an ecosystem before which was destroyed.
How did Tony Sinclair count the large mamals?
By conducting long-term research on large mammals in the Mara–Serengeti ecosystem and elsewhere in East Africa, Sinclair showed the ways in which different animal populations are regulated.
if the killer whale obtained 26,000 joules of energy by eating the crabeater seal, how many energy was available at each of the following trophic levels of the food chain?
Energy available to killer whale: 26,000 joules
Energy available to crabeater seal: 260,000 joules (assuming a 10% energy transfer efficiency between trophic levels)
In ecological systems, energy transfer between trophic levels follows the 10% rule, meaning that approximately 10% of the energy is passed on to the next trophic level. In this scenario, if the killer whale obtained 26,000 joules of energy from consuming the crabeater seal, it can be inferred that the crabeater seal initially possessed 10 times that amount, or 260,000 joules.
This estimation takes into account the energy lost as heat, metabolic processes, and other inefficiencies as energy moves through different trophic levels in the food chain. Therefore, each trophic level typically retains only about 10% of the energy from the level below it, illustrating the energy dynamics within the ecosystem.
A mushroom gains it’s energy by decomposing the tissues of dead organism. Should mushrooms be classified as autotrophs, heterotrophs in both groups, or in neither group and for what reason?
A. They are autotroph because they do not eat their food , as animal do
B. They are autotroph because decomposition is very similar to photo synthesis
C. They are heterotrophs because their food is made by other organisms
D. They are both autotrophs and heterotrophs, because they may grow in sunlight or darkness
Answer:
Because mushrooms require obtaining food from other sources, it should be considered that they are heterotrophs because their food is made by other organisms (option C).
Explanation:
Mushrooms are the sporocarps of multicellular eukaryotic organisms belonging to the Fungi kingdom. Unlike plants -which are able to synthesize their own nutrients- mushrooms must acquire nutrients from organic matter, so they are considered heterotrophic.
The nutrition of mushrooms depends on their affinity for living organic matter -in the form of parasites or symbionts- or dead organic matter, performing its digestion through enzymatic degradation. The sporocarp that characterizes the mushrooms, is the visible form of development that can acquire a fungus.
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determine which scientist made each contribution
Answer:
Pictures?
Explanation:
Answer:
If on Edg...
Robert Hooke
Observed cork cells
Was the first to use word "Cell"
Anton van Leeuwenhoek
observed "animalcules"
used polished lens
Explanation:
Sometimes a few of the planets are visible from Earth without a telescope. Why do the planets look so small from Earth?
A. because they are extremely far away
B. because they are each about the size of a grain of sand
C. because they are always moving away from Earth
OD. because the Earth's atmosphere distorts what we see
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10 of 22 Answered
Answer:
A
Explanation:
Pretty sure its A
letter a
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The _______ biome has trees that lose leaves once each year.
The _______ zone is where the ocean meets land.
There are different vegetative patterns throughout the world. The vegetation that can grow is influenced by the amount of heat received. The differences in heat give rise to _______ zones.
Monkeys, zebras, and tigers live in a/an _______ biome.
In the composition of water on earth, freshwater accounts for _______percent of the water on earth.
Answer: Deciduous biome, intertidal zone, deciduous biome, heat zones
0.9%
Explanation: The kind of flora and fauna depend on the heat received in those regions. The ones with high temperatures will have different kind of vegetation compared to ones receiving lesser heat.
The deciduous biomes constitute a large part of the southern hemisphere of the globe. The forests are majorly which shed leaves.
These biomes have diverse set of animals in their forests with varied trophic (food) levels.
Even though three fourth of the planet is covered in water, The fresh water accounts for less than one percent that can actually be actually be consumed by living beings.
deciduous forest
intertidal
climate
terrestrial
2.5
The abiotic factors that determine a terrestrial biome are weather, climate, latitude and amount of sunlight an area receives, and nutrients available.
The amount of precipitation and the warm climate in the tropical rainforest support more organisms in that area. There are fewer limiting factors in the tropical rainforest.
The order of most to least sunlight is littoral zone, limnetic zone, and profundal zone.
Biomes are different because of their differing latitude, climate, weather, amount of sunlight, and precipitation. All organisms have a range of tolerance for the temperature, amount of sunlight, and precipitation in which they can survive.
Explanation: