Optical Microscope - Resolution
Explanation:
Optical microscope resolution is the shortest length between any two closely located bright points on the specimen which can be viewed clearly by the viewer.
The resolution ability of an optical microscope is specified by how it distinguishes these two airy disk points which are closely placed on the specimen.
In optical microscope, with higher magnification, the image may get blurred or unsharp which can be corrected depending upon its objective. The resolution increases with increase of the numerical aperture of the entire system.
The resolution of an optical microscope is around 200 nm with a magnification power of about 1000. This resolution is less compared to that of an electron microscope .
The diagram below shows three parts labeled A, B, and C, of Earth's orbit around the sun.
Which of these statements is correct about Earth in the three parts of the orbit?
a. It travels faster in part A than in part B.
b. It travels faster in part C than in part B.
c. It travels slower in part A than in part C.
d. It travels slower in part A than in part B.
Answer:
Option A.
Explanation:
It travels faster in part A than in B, because the distance between the earth and the sun in part A is shorter.
Which describes an oxidation reaction that occurs during cellular respiration?
Answer:
Glucose loses electrons and hydrogen to form carbon dioxide.
Explanation:
During aerobic respiration, oxygen is reduced, donating an electron to hydrogen to form water. The entire process of cellular respiration oxidizes glucose. The oxygen taken in by a cell combines with glucose to produce energy in the form of Adenosine triphosphate (ATP), and the cell releases carbon dioxide and water. This is an oxidation reaction in which glucose is oxidized and oxygen is reduced.
Which molecule carries the energy produced
during cellular respiration?
glucose
carbon dioxide
АТР
Answer:
Energy is produced via ATP during cellular respiration. ATP is the body's energy currency and is used in many processes.
Explanation:
How many electrons does a neutral atom with four protons contain?
If a disturbance were to occur in an ecosystem, which of the following ecosystems would be most vulnerable to extinctions? continental ecosystems island ecosystems marine ecosystems tropical ecosystems
Answer:
The answer is D: tropical ecosystems
Explanation:
Its is tropical ecosystem because they are the most fragile, and intricate systems
Answer:
marine ecosystems and tropical ecosystems
Explanation:
For example, Caribbean coral reefs, whose natural barrier is at serious risk of disappearance, such as tourist exploitation, overfishing, etc. The Aral Sea is another example of a collapsed and unrecoverable sea.
Climate change will affect many species and habitats and will have a consequence on fishing. Displacements of marine species due to warming of the waters can cause invasions high rates of local extinction in the tropics and seas. Molluscs, echinoderms and corals that form reefs, are very sensitive to crustaceans and fish, which can have harmful consequences for fishing.
Which statement about water is correct? and why?
a) Water molecules are polar, therefore fatty acids do not dissolve.
b) ice has a higher density than liquid water, therefore some organisms can live under the ice.
Answer:
A
Explanation:
ice's density is lower that water's density
A certain stem cell produces only muscle cells. What kind of stem cell is this?
O
O
A. Multipotent
B. Totipotent
C. Unipotent
O
O
D. Pluripotent
Explanation:
the kind of cell it is is unipotent cell
Answer:
The answer is C.
C. Unipotent
Explanation:
To prevent the pollution of groundwater, waste water collected from landfills should be A. diluted by mixing it with drinking water. B. filtered by soil and plants. C. piped to nearby lakes and streams. D. treated before it is released.
Answer:
D.
Explanation:
Answer:
D
Explanation:
which is the most accurate statement
A. the scientific method and technology development follow different steps.
B. scientists design new tools when engineers are able to create them.
C. engineers create questions, and scientists try to answer them.
D. science and technology rely on and influence each other.
Answer:
D: science and technology rely on and influence each other. This is the most accurate statement.
Explanation:
Any technology would use science to solve its problems. Science, in turn, uses technology to make new discoveries and prove them. For example: engineer create microscopes, monitors etc and science uses all these tools to do research and perform their scientific methods for new discoveries. When an engineer thinks of designing something new, he understands science, i.e. he would try to understand all the laws scientists have discovered and proved.
This way both science and technology not only rely on each other but also influence each other.
Which type of population growth is shown in this graph?
Population of Bacteria
Population Size
35,000
30,000
25,000
20.000
15.000
10.000
5000
1
2
3
4
5
6
Answer: the answer would be 5 are there on the top the answer would be 15.000 because they both can go in and into each other if you did multiply 5 times 3 equals 15
Explanation:
The graph shows exponential population growth.
We can tell this because the population size increases rapidly over time, without showing any signs of slowing down or leveling off. This is characteristic of exponential growth, where the population grows at a constant rate.
In contrast to exponential growth, logistic growth shows a period of rapid growth followed by a leveling off as the population approaches its carrying capacity (the maximum population size an environment can support).
Pure substances are made up of single elements or compounds. (2 points) True False
Answer:
true
Explanation:
The statement is true as pure substances consist of only one type of matter, which can be an element or a compound. Elements are made of single types of atoms, while compounds are composed of two or more types of atoms chemically bonded together.
Explanation:The statement 'Pure substances are made up of single elements or compounds' is true. A pure substance has a constant composition and properties that are constant throughout the sample. By definition, pure substances can either be elements or compounds. An element is the simplest form of matter composed of only one type of atom and cannot be broken down into any simpler substance through chemical means. For example, aluminum is an element. A compound, on the other hand, consists of two or more types of atoms chemically bonded together, such as water, which is made up of hydrogen and oxygen atoms. Therefore, pure substances maintain a uniform composition and exhibit definite physical and chemical properties.
. A pure substance is a type of matter that has a constant composition and properties that are constant throughout the sample. Elements are the simplest substances made up of only one type of atom, while compounds are substances that are made up of more than one type of atom.
Which of these describes a method in studying plate movements?
-Observing the absence of magnetic rocks in locations that do not match the poles
-Match relief elements only on the western side of the Atlantic Ocean
-Recording the spread of the seafloor in the mid-Atlantic region
-Correlate the rotation of Earth to plate movement
Answer:
C: Recording the spread of the seafloor in the mid-Atlantic region .
This describes a method in studying plate movements
Explanation:
Seafloor spreading is the ‘process’ by which oceanic crusts are formed as a result of volcanoes. Then these crusts slowly drift away from the edge/ridge. It usually occurs at mid-ocean edges.
When plates move, they collide. Because of these collisions volcanoes and earthquakes occur. Volcanoes occur when one plate sinks under another plate. This allows the lava to get inside the plates and volcano occurs after the build-up of this magma or lava. Earthquakes are caused when two plates collide and slide with each other. Thus, Option C is the correct answer as plate movements eventually cause se floor spreading.
As a character of all living things, homeostasis relates most directly to which of the following biological themes
Explanation:
As a characteristic of all living things, homeostasis relates most directly to which of the following biological themes?
A.) Interacting systems.
B.) Stability.
C.) Evolution.
D.) Scale and structure.
Correct: B.) Stability.
During homeostasis the body maintains a constant internal balance (stability) in pH, temperature, blood pressure etc. Cells in a multicellular organism become specialized for particular tasks and communicate with one another in order to maintain homeostasis.
Within the human body these are known as hormone cascades, where several complex steps occur- the tissues signal to one another with the use of hormones released by the endocrine system. The regulation (increase and decrease) of these secretions is achieved by negative feedback loops, where the release of certain substances during a cascade in turn halts the secretion of hormones at earlier stages.
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In conjugation, what structure serves as a bridge between two bacterial cells?
Answer:
Pilus
Explanation:
Conjugation can be described as one of the processes by which a bacteria transfers it's DNA into another bacteria. In this method of DNA transfer, the donor bacterium cell forms a pilus and joins with the recipient bacterial cell. This allows the DNA from the donor cell to get transferred into the recipient cell. Mostly, the DNA is a plasmid which is transferred. The pilus is formed by the F factor of the donor DNA.
Which of the following is the most specific group used to classify organisms?
Final answer:
The most specific classification category for organisms is the species, which represents a group capable of interbreeding and producing fertile offspring. It is the final and most precise category in the Linnaean system of taxonomic classification.
Explanation:
The most specific group used to classify organisms within the modern taxonomic classification system is the species. This system, also known as the Linnaean system after its inventor Carl Linnaeus, organizes life forms into a hierarchy from the least specific to the most specific categories. The order from the broadest to the most specific is: domain, kingdom, phylum, class, order, family, genus, and species. The species is the most precisely defined category, representing a group of organisms that can interbreed and produce fertile offspring. Under the binomial nomenclature system, each species has a unique two-part scientific name consisting of its genus and species designations, such as in Homo sapiens, where 'Homo' is the genus and 'sapiens' is the species.
5. Explain how an enzyme changes the activation energy of a reaction.
Answer:
enzymes are protein that increase the rate of a reaction by decreasing the amount of energy needed to get a reaction started
Explanation:
enzyme inhibitors give substances that bind to an enzyme and change its shape or block its ability to interact with the chemical reaction
Describe how humans’ way of life has changed. Begin with hunter-gatherers and end with life after the Industrial Revolution.
Answer:
Ever since the existence of life of humans on Earth, the humans have been making progress to understand themselves and the mother nature.
In the start, the humans were hunter- gatherers. Hunter- gatherers can be described as humans which use wild life plants and animals for food. The humans used to live in jungles and eat the wild- life plants and animals. They used leaves from the trees to cover their bodies. Heat was produced by rubbing the rocks.
After this time, the humans learned the techniques of cultivating plants for food. They started cultivating crops and depend on them for living. During this time, humans learned the art of farming and agriculture. But they couldn't understand the effects of various pathogens infecting the crops and humans at that time.
After this time, humans learned the art of preserving foods in different forms like pickles etc. They also learned that certain types of plants could be used to treat wounds and other diseases.
With the passage of time, people learned to make and use machinery for making their tasks easier. The usage of machinery progressed rapidly and the industrial revolution began. People became more diverted to this sector rather than farming. They started to move towards the cities to find better jobs in industries.
Life after industrial revolution was much easier as humans had made a lot of equipments which aid them to have a better life style. Science has been developing since that time day by day.
Explanation:
Identifying Forms of Energy
Match each form of energy with its description.
thermal energy
a piece of fruit hanging from a tree
electrical energy
lightning produced during a storm
kinetic energy
OOUUU
radio waves transmitted from a tower
gravitational potential energy
sand on the beach feels warm
to the touch
a box moving along a conveyor belt
radiant energy
Answer:
gravitational potential energy-a piece of fruit hanging from a tree
radiant energy-radio waves transmitted from a tower
Thermal energy-sand from the beach feels warm to the touch
Kinetic energy-a box moving along at a conveyor belt
electrical energy- lightning produced by a storm
Explanation:
Hope this helps!
the answers are provided in the picture below:
Which is a difference between plant and animal cells?
Answer:
Some differences are cell walls, plants have large vacuoles, and plants have chloroplasts
Explanation:
Answer:
B. a plant cell has a well defined shape, because it has a cell wall
Enzyme A is currently functioning at a temperature of 55 and a pH of 7. According to the information provided in the chart, select all factors that would increase the rate of function of enzyme A?
The factors that increase the rate of function of enzyme A are optimal temperature, optimal pH, and substrate concentration.
Explanation:The factors that would increase the rate of function of enzyme A are:
Optimal Temperature: Enzyme activity generally increases with temperature, but outside the optimal temperature range, high temperatures can cause enzymes to denature and lose their function.Optimal pH: Enzymes function best within a specific pH range. Extreme pH values can cause enzymes to denature and lose their activity.Substrate Concentration: Enzyme activity is increased at higher substrate concentrations until it reaches a saturation point where the enzyme can no longer bind additional substrate.Learn more about Factors that increase enzyme rate of function here:https://brainly.com/question/35490731
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Final answer:
To increase the activity of enzyme A, one should reduce the temperature to the optimum of 37 degrees Celsius and maintain the pH at 7. Additionally, adjusting concentrations of enzymes, substrates and understanding ionic conditions can also affect enzyme activity.
Explanation:
To increase the rate of function of enzyme A, based on the information provided, it is necessary to adjust temperature and pH to optimal levels. Since the enzyme amylase has an optimal temperature of approximately 37 degrees Celsius and the current temperature of enzyme A's environment is 55 degrees, reducing the temperature would increase the enzyme activity. The optimal pH for amylase is around 7, which is already the current pH level for enzyme A, so maintaining this pH will ensure maximum enzyme efficiency.
Beyond environmental factors, increasing the concentration of the enzyme or the substrate may improve the enzyme's rate of reaction, provided that saturation point isn't reached for the enzyme. It's also important to note that a build-up of product concentration can inhibit enzyme activity, and altering ionic conditions can affect enzyme function.
However, if the temperature is raised further beyond the optimal, it can lead to denaturation of the enzyme, thus decreasing its rate of activity. In summary, reducing the temperature to 37 degrees Celsius while maintaining a pH of 7 and considering the concentration of enzymes, substrates, products, and the ionic environment would be the factors to increase the rate of function of enzyme A.
which answer Choice lists one renewable and one non-renewable resource
1. wind and wood
2. natural gas and solar energy 3. natural gas and petroleum
4. natural gas and coal
Answer:
2
Explanation:
natural gasses come from the earth and and will take a longer time to replenish
solar energy is a renewable resource
sorry if this turns out wrong
Answer:
2. natural gas and solar energy
Explanation:
Renewable resources are those that can be used repeatedly and replaced naturally, as they will replenish over time without human intervention. Non-renewable resources are limited and either don't replenish or do it very very slowly. In this sense, wind, wood, and solar energy are renewable, and natural gas, coal and petroleum are non-renewable. Therefore number 2 is the correct answer.
Which product can you NOT recycle? A. newspaper B. pressure-treated wood C. aluminum soda can D. plastic milk jug
Answer:
Pressure treated wood
Explanation:
Answer
b wood
Explanati
Which of the following elements is a trace element?
ATP Molecules
Mitochondria
Nucleus
Synthesis of
Enzymes
Synthesis of
Molecules of
1. The nucleus contains molecules of A, which
A) recycle waste products
C) store hereditary information
B) remove water from the cell
D) regulate the pH of cytoplasm
Explanation:
The complete question is attached below:
3) store hereditary information
The nucleus is a large membrane-bound organelle that houses the genetic information, DNA, as on units called chromosomes. ATP functions as a precursor molecule for more complex nucleotides.
Sequences of DNA make up genes which can have different forms called alleles. DNA is transcribed into mRNA and later translated into amino acids which are linked together by rRNA to form proteins.
Further Explanation:
All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wound around histones as chromosomes. Chromosomes within the nucleus is unwound, unzipped and read by enzymes in a complex series of steps known as transcription. The message on DNA, called genes is copied by RNA polymerase to form mRNA complementary sequence to that of the DNA strand. These are then translated into proteins in ribosomes.
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Final answer:
The nucleus of a cell stores hereditary information in the form of DNA, making option C) store hereditary information the correct answer to the student's question. Meanwhile, mitochondria produce ATP, the cell's main energy-carrying molecule, through cellular respiration.
Explanation:
The nucleus of a cell is an organelle that functions as the command center, storing the cell’s hereditary information. This information is encoded within the cell’s genetic material, specifically in the deoxyribonucleic acid (DNA). The DNA contains the instructions necessary for the cell to produce all the materials it requires, thus directing the cell’s activities. In answer to the student's question, the nucleus contains molecules of option C) store hereditary information.
Mitochondria, on the other hand, are known as the cell's “powerhouses” or “energy factories” because they are responsible for producing adenosine triphosphate (ATP), which stores energy for the cell. The process by which ATP is created within mitochondria is called cellular respiration, utilizing oxygen to metabolize nutrients such as glucose, and releasing carbon dioxide as a waste product.
Within cells, numerous other organelles and structures work together to support cellular functions. For example, peroxisomes detoxify chemicals, and the cytoskeleton provides structural support. Each of these cellular components has a unique function that contributes to the overall operation and health of the cell.
in the diagram the top square and circle represents the generation
Answer:
D
Explanation:
The top square and circle represent the decreased male and decreased female generation in a given diagram.
What are the causes of decreased men proportion within a generation?A square or rectangle represents a male gender, while a circle represents a female gender. The term decreased indicates a reduction in the population of males and females. In the given, diagram, the top square and circle represents the decreased male and decreased female generation.
Various factors are responsible for decreased male and decreased female generation in a given generation which include changes in birth rates, death rates, and migration patterns can all affect the number and proportion of males and females in a given population.
Exposure to environmental pollutants or toxins also have a negative impact on the reproductive health of both males and females resulting in lower birth rates. Economic factors such as poverty, lack of healthcare, illiteracy are some other factors. Smoking, alcohol consumption, and poor nutrition also effect the fertility and reproduction.
Therefore, the top square and circle represent the decreased male and decreased female generation in a given diagram.
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List four factors that can cause slope or land movements
Answer:
rainfall, changes in water level, earthquakes
What determines whether an allele is dominant or recessive
Answer:
A dominant allele in the genotype is always expressed in the phenotype. For example, if brown eye color is dominant in a species, an animal that inherits even a single brown allele will always have brown eyes. If it's recessive, he'll only have brown eyes if he inherits a brown allele from each parent.
Explanation:
Define what terms origin, insertion and tendon
Answer:
Origin: In biology, origin can be described as the location where the muscle joins a stationary bone and as a result, no movement occurs.
Insertion: In anatomy, insertion can be described as the point of attachment which allows movement of a bone to occur. It moves when the muscles contract.
Tendon: In biology, the tendon can be described as a type of connective tissue which attaches a bone to a muscle.
100 POINTS TO ANYONE WHO ANSWER THIS
hat is a job of the muscular system?
remove waste
protect the body from germs
deliver nutrients to the body
provide movement
Answer:
provide movement
Explanation:
The enforcement of hunting regulations are conservation measures that promote the A. use of biological controls. B. fur industry. C. exploitation of species. D. preservation of species.
Answer:
the answer is D: the the preservation of species
Explanation:
Answer:
The answer is D. However if you are on study island the letter is C. But it is still PRESERVATION OS SPECIES
Explanation: