A major difference between a dissecting microscope and a compound microscope is that they differ in the type of samples they are used for. the major difference between the two microscopes lies in the type of samples they are best suited for, with the dissecting microscope being ideal for larger specimens and the compound microscope for smaller, transparent samples.
Dissecting microscope is commonly used for tasks such as dissection, microsurgery, or examining the surface details of an object. The dissecting microscope typically provides lower magnification, ranging from 5x to 100x, and offers a wider field of view, allowing for a larger area of the specimen to be observed at once.On the other hand, a compound microscope is primarily used for the observation of small, thinly sectioned samples or transparent specimens. It utilizes a series of lenses to magnify the image and is commonly used in biological research, pathology, and educational settings. Unlike the dissecting microscope, the compound microscope is a light microscope that employs visible light to illuminate and visualize the sample.
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The major difference between a dissecting microscope and a compound microscope is that they differ in the type of samples used.
Dissecting microscopes and compound microscopes are both popular types of microscopes that are used in the scientific field for a range of different applications. However, these two types of microscopes have significant differences that make them more suitable for specific purposes.
For example, dissecting microscopes are useful for studying larger specimens that are opaque and three-dimensional. These microscopes provide a low magnification and have a large working distance to help users work with samples that may not be easily manipulated.
Dissecting microscopes also come with 3 lenses, which helps to provide a clear view of the sample, and they are useful for studying a range of specimens, including rocks, insects, and plant structures. On the other hand, compound microscopes are light microscopes that are used to observe small, transparent specimens at high magnification.
Unlike dissecting microscopes, compound microscopes use a beam of light that passes through the sample to form an image.
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How many possible connections are there among the neurons of the brain?
(A) about 500 million
(B) about 500 trillion
(C) about 5 billion
(D) about 50 trillion.
The number of possible connections among the neurons of the brain is about 500 trillion (B).
Neurons are specialized cells that process and transmit information in the brain. Each neuron is connected to other neurons through synapses, which are the sites of communication between neurons. The number of possible connections between neurons in the brain is incredibly large.
According to estimates, the human brain has about 100 billion neurons, and each neuron can form connections with up to 10,000 other neurons. This means that the total number of possible connections in the brain is about 1 quadrillion (10^15).
However, not all possible connections are formed in the brain, and the actual number of connections is estimated to be around 150 trillion (10^14). Therefore, the correct answer to the question is an option (B) about 500 trillion.
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1) In Possibility A, Crusoe can produce 0 pounds of fish and 28 pounds of fruit.
In Possibility B, Crusoe can produce 4 pounds of fish and 24 pounds of fruit.
In Possibility C, Crusoe can produce 7 pounds of fish and 19 pounds of fruit.
In Possibility D, Crusoe can produce 9 pounds of fish and 13 pounds of fruit.
In Possibility E, Crusoe can produce 10 pounds of fish and 7 pounds of fruit.
In Possibility F, Crusoe can produce 11 pounds of fish and 0 pounds of fruit.
10 pounds of Fish and 0 pounds of Fruit is an attainable combination.
True
False
2)
In Possibility A, Crusoe can produce 0 pounds of fish and 28 pounds of fruit.
In Possibility B, Crusoe can produce 4 pounds of fish and 24 pounds of fruit.
In Possibility C, Crusoe can produce 7 pounds of fish and 19 pounds of fruit.
In Possibility D, Crusoe can produce 9 pounds of fish and 13 pounds of fruit.
In Possibility E, Crusoe can produce 10 pounds of fish and 7 pounds of fruit.
In Possibility F, Crusoe can produce 11 pounds of fish and 0 pounds of fruit.
11 pounds of Fish and 0 pounds of Fruit is an efficient combination.
Select one:
True
False
3)
In Possibility A, Crusoe can produce 0 pounds of fish and 28 pounds of fruit.
In Possibility B, Crusoe can produce 4 pounds of fish and 24 pounds of fruit.
In Possibility C, Crusoe can produce 7 pounds of fish and 19 pounds of fruit.
In Possibility D, Crusoe can produce 9 pounds of fish and 13 pounds of fruit.
In Possibility E, Crusoe can produce 10 pounds of fish and 7 pounds of fruit.
In Possibility F, Crusoe can produce 11 pounds of fish and 0 pounds of fruit.
As Crusoe spends more time catching fish and hence catches more fish, what happens to the opportunity cost of one more pound of Fish?
Select one:
a. none of the answers
b. Does not Change
c. Indeterminate
d. Decreases
e. Increases
Clear my choice
4)
In Possibility A, Crusoe can produce 0 pounds of fish and 28 pounds of fruit.
In Possibility B, Crusoe can produce 4 pounds of fish and 24 pounds of fruit.
In Possibility C, Crusoe can produce 7 pounds of fish and 19 pounds of fruit.
In Possibility D, Crusoe can produce 9 pounds of fish and 13 pounds of fruit.
In Possibility E, Crusoe can produce 10 pounds of fish and 7 pounds of fruit.
In Possibility F, Crusoe can produce 11 pounds of fish and 0 pounds of fruit.
In case of a move from A to B, what is the opportunity cost of one more pound of Fish?
Select one:
a. 3 less pounds of Fruit
b. none of the answers
c. 1 less pound of Fruit
d. 2 less pounds of Fruit
e. 4 less pounds of Fruit
1) False 2) False 3) The opportunity cost of one more pound of Fish decreases as Crusoe spends more time catching fish 4) The opportunity cost of Fish from Possibility A to Possibility B is 3 less pounds of Fruit.
1) The given combination of 10 pounds of Fish and 0 pounds of Fruit is not attainable since it does not correspond to any of the possibilities provided. None of the possibilities mention this specific combination.
2) The combination of 11 pounds of Fish and 0 pounds of Fruit is not efficient. Efficiency refers to achieving the maximum possible output with the given resources. Since Possibility F allows Crusoe to produce 11 pounds of Fish and still produce 0 pounds of Fruit, it indicates that more Fruit could be produced without sacrificing Fish production. Therefore, it is not an efficient combination.
3) As Crusoe spends more time catching fish and catches more fish, the opportunity cost of one more pound of Fish decreases. Opportunity cost refers to the value of the next best alternative that is given up when making a choice. In this case, as Crusoe catches more fish, he has to allocate more time and resources to fishing, resulting in a decrease in the production of fruit. The decrease in fruit production represents the opportunity cost of producing one more pound of Fish.
4) The opportunity cost of one more pound of Fish when moving from Possibility A to Possibility B is 3 less pounds of Fruit. This is because Crusoe gives up the production of 3 pounds of Fruit (from 28 to 24 pounds) in order to produce 4 pounds of Fish instead of 0 pounds. The difference in Fruit production between the two possibilities represents the opportunity cost of producing one more pound of Fish.
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where are the eletrons found in the structure of an atom
Electrons are found in orbits around the nucleus
Answer:
found in the nuculace
Explanation:
Which cellular process takes place in the ribosomes that are bound to the
endoplasmic reticulum?
A. The replication of nucleic acids
B.The breakdown for waste material
C.The conversion of radiant energy to glucose
D.The synthesis of new proteins
Answer:
I belivie the answer is C
Explanation:
The endoplasmic reticulum can be smooth or rough, and in general its function is to produce proteins so that the rest of the cell can function. The rough endoplasmic reticulum contains ribosomes, which are small, round organelles whose job is to make these proteins. Sometimes when proteins are made improperly, they get caught in the endoplasmic reticulum and overload it, leaving it cramped, in a way, and the proteins don't go where they should go. Then there is the smooth endoplasmic reticulum, which has no ribosomes in it, and which produces other substances that the cell needs. Thus, the endoplasmic reticulum is an organelle that is really a workhorse in the production of proteins and substances that the rest of the cell needs.
I hope help you
how plants will be affected by change in water intermolecular forces
A human pancreatic cell obtains O2 Fuel molecules such as glucose and building material such as amino acids and cholesterol from its environment and releases CO2 as a waste product of cellular respiration. In response to hormonal signals the cell secrets digestive enzymes. It also regulates its ion concentration‘s by X changing with its environment. Based on what you have just learned about the structure and function of cellular membranes write a short essay that describes how such a cell accomplishes these interactions with its environment
Answer:
Cells Can Respond to Changes in Their Environments. Chemicals that could move through cells, either through diffusion through the cell membrane or by the action of transport proteins, and could bind directly to proteins within the cell and modulate their activities.
Explanation:
Cells Can Respond to Changes in Their Environments -:The environments in which cells grow are often rapidly changing. Cells, for instance, can consume all of a certain food source and must use others. Cells have developed strategies for adapting their biochemistry to function in a changing world in response to signals suggesting environmental change. The modifications can take many forms, including changes in the activities of pre-existing enzyme molecules, changes in the synthesis rates of new enzyme molecules, and changes in the processes of membrane transport.
To form colonies with specialized functions, some cells may interact -: Early organisms lived exclusively as single cells. Such organisms interacted with one another only indirectly by competing for resources in their environments. However, some of these species have evolved the capacity to construct colonies that involve several interacting cells. In such classes, the presence of surrounding cells, which may be in direct contact with one another, dominates the environment of a cell. These cells communicate with one another by a variety of signaling mechanisms and may respond to signals by altering enzyme activity or levels of gene expression. Cell differentiation can be one result; differentiated cells are genetically similar but have distinct properties because they express their genes differently.
As individual single cells, some modern organisms will turn back and forth from existence to existence as multicellular colonies of differentiated cells. One of the best described is the slime mold Dictyostelium. In suitable environments, this organism lives as individual cells; under conditions of starvation, however, the cells come together to form a cell aggregate. The cells expand, replicate and live as individual cells when they arrive in a well-stocked location until the food supply is again depleted. This aggregate will migrate as a unit to a potentially more favorable environment, often called a slug, where it then forms a multicellular structure , called a fruiting body, which rises significantly above the surface on which the cells are developing. Wind will move cells released from the top of the fruiting body to places where the supply of food is more abundant.
Hence, the answer is given about the cell interaction with its environment.
how do hydrogen bonds make water cohesive?
Answer:
Depending on how attracted molecules of the same substance are to one another, the substance will be more or less cohesive. Hydrogen bonds cause water to be exceptionally attracted to each other.
Explanation:
What is it called when rain or snowmelt seeps through soil or rock down into the aquifer?
Answer:
Groundwater
Explanation:
Which of the following events would decrease competition for resources in an ecosystem? a disease reduces the population of rabbits in a grassland area a drought reduces the amount of water available to an ecosystem a fire has killed off a portion of the vegetation many offspring are produced in a single year
The event that would decrease competition for resources in an ecosystem is many offspring produced in a single year.
The ecosystem is the system that is formed by living beings (flora, fauna, and humans) and their interactions with the environment in which they live. In ecosystems, competition is common and intense. All living beings require food, water, light, space, and other resources, and not everyone can obtain them.A drought that decreases the amount of water available to an ecosystem can increase the competition for water. A disease that reduces the population of rabbits in a grassland area will reduce competition for food, but will not affect competition for other resources.
A fire that kills off a portion of vegetation will also reduce competition for food, but it may increase competition for other resources. The event that would decrease competition for resources in an ecosystem is many offspring produced in a single year. It reduces competition for food because the offspring will consume less food and have fewer needs than adult individuals. Therefore, the production of many offspring can lead to increased competition between the offspring for limited resources, but decreased competition between offspring and adults.
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Most organisms contain the same codons.
True or false?
Answer:
True
Explanation:
Answer:
True
Explanation:
"Theoretically, the genetic code is universal. This means that the same codon "means" the same amino acid in all organisms. For example, in both humans and bacteria, a codon made of three thymine DNA-letters will code for an amino acid called Phenylalanine."
what does the atomic mass of a element represent ??
A. The total mass of its neutrons
B. The average total mass of its electrons
C. The total number of its protons and electrons
D. The average total mass of its neutrons , protons and electrons
Answer:
ans is c is correct pls mark me as brainlist pls
help me w/ this pls .. will mark brainliest
What do transport proteins do?
Help blood to flow through the body
Enable nutrients to go to the right tissues
Guide amino acids to the stomach
is anaerobic respiration? write the word equation for the process.
Answer:
Some examples of anaerobic respiration include alcohol fermentation, lactic acid fermentation and in decomposition of organic matter. The equation is: glucose + enzymes = carbon dioxide + ethanol / lactic acid. Though it does not produce as much energy as aerobic respiration, it gets the job done.
how can u tell wether or not a
glass is cold
u cantt
Answer:
Explanation:
Umm well if it's cold and filled with water then the outside will get water residue and maybe even have water drop down the side. This is just a guess
Identify the organelles labeled on the cell to the right.
A
B
C
D
E
F
A cell is the smallest unit of any living species and is responsible for functions, structural building and growth. Cells contain organelles inside them that have various functions and roles.
The labelling of structures are:
A: NucleusB: LysosomeC: CentrioleD: CytoplasmE: Cell membraneF: MitochondriaThe roles of cell organelles are:
The nucleus is the main hereditary and regulatory organelle of cells and stores the genetic material called DNA.Lysosomes have digestive enzymes that break the extra or damaged cells. They also digest some viruses and bacteria that invade the body.Centrioles are found in pairs near the nucleus and forms spindles during the process of mitosis and meiosis.The cytoplasm is a viscous fluid inside the cell membrane where all the organelle lies and functions as a medium in cellular chemical reactions.The cell membrane acts as a barrier between the outer and inner cell environment and allows the entry and exit of proteins transport.Mitochondria is the most vital cell organelle and produces the energy required for cell functioning. It is the place where chemical reactions occur to produce ATP.Therefore, the correct labelling are A: Nucleus, B: Lysosome, C: Centriole, D: Cytoplasm, E: Cell membrane and F: Mitochondria.
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Explain if and why alpha-Bungarotoxin affect the generation of an action potential on a single presynaptic neuron and how an external stimulator used to bring that neuron to threshold would affect it?
Alpha-bungarotoxin blocks nicotinic acetylcholine receptors, reducing the probability of generating an action potential. Higher-intensity stimuli may be needed to overcome its effects.
Alpha-bungarotoxin is a type of toxin that affects acetylcholine receptors. These receptors are essential for the generation of an action potential on a single presynaptic neuron. Therefore, alpha-bungarotoxin can have an effect on the generation of an action potential on a single presynaptic neuron.
The toxin can bind to and block the nicotinic acetylcholine receptors (nAChR) on the postsynaptic membrane. This leads to a decrease in the number of nAChR available for acetylcholine to bind to, resulting in a decrease in the amplitude of the endplate potential and a decrease in the probability of generating an action potential. This can lead to a decrease in muscle contraction or paralysis.
External stimulators, such as electrical stimuli, can be used to bring the neuron to the threshold. However, if alpha-bungarotoxin is present, it will still be able to block the nAChR, resulting in a decrease in the probability of generating an action potential. In this case, a higher-intensity stimulus may be required to bring the neuron to the threshold.
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Can a population of rabbits grow continuously without a limit?
Which of these is a form of active transport that means "Into" "cell?"
Which of the following is a type of active transport?
Active Transport is the term used to describe the processes of moving materials through the cell membrane that requires the use of energy. There are three main types of Active Transport: The Sodium-Potassium pump, Exocytosis, and Endocytosis.
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a plant cell is placed in a hypotonic solution. turgor pressure will…
When a plant cell is placed in a hypotonic solution, turgor pressure will increase.
A hypotonic solution is a solution in which the solute concentration is lower than that of the cell. When a plant cell is placed in such a solution, water enters the cell by osmosis.
As a result of the cell membrane and cell wall's resistance, the cell swells up, causing turgor pressure to increase.
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What characteristics are common between
mitochondria and chloroplasts?
I) ATP is produced;
II) DNA is present;
III) Ribosomes are present.
1. I only
2. II only
3. II and III only
4. III only
5. I, II and III
Answer:
I believe that the answer is Three
Explanation:
Even though both organelles are found in eukaryotic cells, both mitochondria and chloroplast have characteristics often found in prokaryotic cells. These prokaryotic cell characteristics include: an enclosed double membrane, circular DNA, and bacteria-like ribosomes.
Complements of Wikibooks.org
Explanation:
Mitochondria and chloroplasts are similar in size and features to prokaryotes. The deep folds of the inner mitochondrial membrane, called cristae, resemble the folds in the prokaryotic cell, called mesosomes. Both cristae and mesosomes function in aerobic cellular respiration.
How do you think an ecosystem can reestablish in an area after a disturbance such as a volcano?
Answer: After an environmental disturbance such as a volcanic eruption or forest fire, communities are able to replace lost species through the process of succession. Primary succession occurs after a volcanic eruption or earthquake; it involves the breakdown of rocks by lichens to create new, nutrient -rich soils.
Explanation:
After an earthquake or volcanic eruption, lichens break down the rocks to produce new, nutrient-rich soils. This procedure is called as primary succession.
What is primary succession?When a new piece of land is produced or is first exposed, primary succession occurs.
This may occur, for example, when lava solidifies and forms new rocks or when a glacier changes and bring out bare rocks. In the initial succession, organisms have to start over.
Mosses or lichens are frequently the first creatures to emerge in areas of primary succession.
Because they are the first species to appear, these organisms are known as pioneer species; pioneer species need to be resilient and powerful, just as early settlers.
Therefore, an ecosystem can reestablish in an area after a disturbance such as a volcano.
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A certain type of plant can produce blue or yellow flowers. During a fire, many yellow flowers are destroyed and now since blue is the dominant trait, the plant reproduces offspring that produce only blue flowers. what is the mechanism?
Mechanism:
Reasoning
Genetic Drift is the mechanism behind this.
Genetic drift is the mechanism that causes the plant to produce only blue flowers.
What is genetic drift?Genetic drift is the arbitrary change in the frequency of a gene variant in a population. Gene variations may totally vanish due to genetic drift, which would limit genetic diversity. Additionally, it has the potential to make previously uncommon alleles far more common and even fixed.
Rare alleles may be lost due to genetic drift, which can also reduce the size of the gene pool. The idea that genetic drift contributes to the evolution of new species is based on the fact that it can also make a new population genetically distinct from its ancestral population.
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Catalysts increase the rate of a reaction by
A) being consumed during the reaction.
B) raising the temperature of the reaction.
C) raising the concentration of the reactants.
D) lowering the activation energy of a reaction.
Answer:
d
Explanation:
It increases the reaction rate by lowering the activation energy for a reaction
Catalysts increase the rate of a reaction by lowering the activation energy of a reaction. Thus, Option D is correct.
what is activation energy?Energy is defined as the capacity to do work, while activation energy is completely different that is In a chemical reaction the energy required to form an activated complex .
In a chemical reaction minimum amount of extra energy required by a reactant to convert into product called activation energy.
It can be represented as Ea and measured in the form of joules or kilojoules per mole or kilocalories per mole.
Two major factors which influence activation energy, such as Nature of Reactants like ionic reactant.
Here the value activation energy will be due to an attraction between two reactants.
Second factor is the role of Catalyst, that is positive catalyst will lower the activation energy where as negative catalyst increase the activation energy.
Hence, Option D is correct.
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Which of the following actions will provide a negative control for the investigation?
Repeating the experiment at 25°C
Repeating the experiment using twice the amount of hydrogen peroxide
Repeating the experiment using twice the amount of peroxidase
A negative control is a control group where no response is expected. It is utilized to ensure that any observed effect is due to the experimental treatment rather than a non-specific experimental variable.
It is an essential experimental control to determine the sensitivity of an assay or reaction and is used to provide a baseline of comparison for experimental treatments. Keeping in mind the definition of a negative control, the following actions will provide a negative control for the investigation: Repeating the experiment at 25°CThe other two options, i.e., repeating the experiment using twice the amount of hydrogen peroxide or peroxidase, would be considered positive controls.
Positive controls are controls that test for the expected response to the experiment. It is employed to verify that the experimental setup is functioning correctly and that the experimental conditions are producing the expected result.
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which organ system is made up of several glands that act in the regulation of metabolism, reproduction, water balance, and many other functions?
The organ system made up of several glands that act in the regulation of metabolism, reproduction, water balance, and many other functions is the endocrine system. This system releases hormones into the bloodstream to communicate with target cells throughout the body to help maintain homeostasis and carry out a variety of functions.
Hormones are chemical messengers that are produced by specialized cells in various glands and then released into the bloodstream. These hormones are transported throughout the body, where they bind to specific receptors on target cells. This signaling process controls a variety of physiological processes, including metabolism, growth and development, water balance, and stress responses.
The major glands of the endocrine system include the pituitary gland, thyroid gland, parathyroid gland, adrenal gland, pancreas, and gonads. These glands produce and release hormones in response to various stimuli, such as changes in the level of certain substances in the blood, nervous system signals, and hormonal feedback loops.
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what are the most economically 'productive disasters'?
Answer:
1. Disasters increase scarcity and reduce the output of economies.
In simplest terms, inputs are necessary for outputs; fewer inputs means fewer outputs. When a disaster damages or destroys resources – whether labor, capital, or natural resources – total production in the economy must fall.
The production possibilities frontier (PPF) is used by economists to model “production possibilities” – the output possible in an economy making full use of its available resources. The PPF shrinks when disasters reduce the availability of the resources used to make goods and services.
Explanation:
To be a possible answer to a scientific question a hypothesis must be ?
Answer:
A hypothesis is a scientific guess.
Explanation:
So a scientific question, is something either related to your hypothesis or the experiment you are doing. (Hope this somewhat helps!)
a) the arrow points to one of the formed elements present in blood. what is its name?b) a decrease in the number of these elements would result in ?
The arrow is pointing to red blood cells also known as erythrocytes which are formed elements present in blood. They are called formed elements because they are the only elements in blood that are not fluids. The erythrocytes are tiny, biconcave disc-shaped structures that play an important role in blood.
These cells are important for transporting oxygen from the lungs to the body's tissues and returning carbon dioxide from the tissues to the lungs for removal. The oxygen-carrying capacity of erythrocytes is due to the presence of a protein called hemoglobin.A decrease in the number of these elements would result in anemia.
Anemia is a medical condition in which the number of red blood cells in the blood is lower than normal. This results in decreased oxygen delivery to the body's tissues, which can lead to a variety of symptoms including fatigue, shortness of breath, and weakness. There are different types of anemia, each with its own underlying cause.
Some of the common causes of anemia include iron deficiency, vitamin deficiency, chronic disease, and blood loss. Treatment of anemia depends on the underlying cause, but may involve dietary changes, supplementation, or medication.
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why does the nuclear membrane break down and go away during cell division
Answer:
f
Explanation:
Answer:
The nuclear envelope (NE) is actively remodeled during mitosis. Microtubule-organizing centers (MTOCs) insert into the NE in closed mitosis. The NE disassembles during open mitosis to facilitate spindle formation. Membrane bending, composition and stabilization are associated with MTOCs.
