Answer:
C: structures found in single- celled organism can act in a manner similar to tissue and organs in multi-cellular organisms
Explanation:
The question above shows a certain similarity in the function of structures of unicellular and multicellular organisms. As we can see, vacuoles are indispensable in balancing water within single-celled organisms. This function is similar to the function of the kidneys, in multicellular organisms, which is also responsible for the balance of water.
In addition, the function of the kidneys is, among others, to filter the blood to eliminate substances harmful to the body, such as ammonia, urea and uric acid. They also work to secrete substances important to our health. The kidneys receive blood from the renal arteries, branches of the aorta that come directly from the heart.
How did the artificial selection practiced by pigeon breeders influence Darwin's theory of evolution by natural selection?
The study of artificial selection by Darwin helped him to establish his theory of evolution via natural selection. One of the animals Darwin examined in detail was the domestic rock pigeon. In the 1850s breeding of pigeons was an ancient past time, thus, Darwin decided to keep and breed the pigeons by himself.
While studying pigeons, Darwin established scrupulous determinations of their skeletons and wondered at the breeds' distinct colors, behaviors, and proportions. He also observed the patterns of inheritance of various features, and he demonstrated that birds of very distinct breeds can, however, generate fertile offspring. Thus, supporting the theory that they all originated from a single species.
Answer:
Answer for PLATO is ; Darwin concluded that if traits in captive pigeons could be selectively passed on to offspring, the selection of traits could also happen in nature.
Explanation:
Pandas eat bamboo for energy. What are pandas?
Pandas are an endangered species that primarily eat bamboo for energy. They digest bamboo with the help of microbes in their gut, and research into these microbes may contribute to advances in biofuel technology.
Pandas are an endangered animal that eats bamboo and are known for their peaceful and sympathetic demeanor. They obtain their energy by consuming bamboo, relying on a diverse population of symbiotic microbes within their digestive tracts to break down the cellulose, as they do not produce their own cellulase enzymes. This attribute has piqued the interest of researchers like Dr. Ashli Brown at Tennessee State, who found over forty cellulose-digesting bacteria in panda feces. This discovery could have significant implications for future biofuel technology, potentially helping to break the glucose-glucose bonds in cellulose more efficiently.
why is a helium atom more stable than a hydrogen atom?
Two electrons completely fill its outermost electron shell
A helium atom is more stable than a hydrogen atom due to its stronger nuclear force complete first electron shell and valence shell configuration.
Explanation:A helium atom is more stable than a hydrogen atom for several reasons. Firstly, a helium atom has two protons in its nucleus, while a hydrogen atom has only one. The additional proton in the helium atom contributes to a stronger nuclear force making the helium atom more stable. Secondly, the helium atom has two electrons which fill its first electron shell completely resulting in a stable configuration.
On the other hand a hydrogen atom has one electron meaning its first electron shell is not completely filled, making it less stable than helium. Lastly the valence shell of helium contains two electrons which provides it with stability as it already satisfies the octet rule. Conversely hydrogen's valence shell contains only one electron making it more likely to react with other atoms to achieve stability.
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in which part of the plant cell does turgor pressure occur
the inside wall of the plants cell
What is the function of the cell membrane
A cell membrane protects a cell from it's surroundings. The cell membrane controls the movement of substances from the outside and inside of cells and organelles.
The cell membrane, also known as the plasma membrane, is the outer covering of animal cells which sits inside the cell wall of plant cells. It is semi-permeable so it allows certain materials to go in and out of the cell. Substances that can pass easily in and out of the cells include oxygen, carbon dioxide, and water. So basically, it is separates the cytoplasm from the outside environment, allowing only certain molecules to enter and exit the cell and also controls the amount of the substances that can go in and out.
Which type of macromolecule regulates cell processes or transports material into and out of cells?
Answer:
Proteins
Explanation:
Proteins perform several functions such as regulation of cellular processes and transport of materials in and out of the cells.
Some proteins serve as enzymes and catalyze the cellular processes and thereby regulate the rate of the product formation. Proteins such as transcription factors regulate the expression of several genes. Some hormones are proteins or derived proteins. Insulin is an example which in turn regulates the blood glucose levels in the body.
Some of the proteins present in the cell membrane serve as channels and pumps to allow the transport of various substances across the cell membrane.
What provides clues on how igneous rocks were formed?
A. color
B. Luster
C. Texture
D. Streaks
*I chose a random subject*
Textures provides the clues about the formation of igneous rocks are formed . Igneous rock texture depends on the rate of cooling . Small crystals are obtained by fast cooling and last crystals are obtained by slow cooling. Basically textures state the comosition of the rocks. Textures of rock may be of different types like phaneritic and crystalline texture.
1. What is the total magnification of an object if the ocular lens magnification is 20x and the objective lens magnification is 45x?
2. Which objective lens is in place if the object you are viewing is magnified 1000x assuming an ocular lens magnification of 10x?
3. What is the diameter of the field of view (DFV) of a 1000x objective lens if the DFV of a 400x objective lens is 500 μ? Express your answer in mm.
4. What is the DFV of a 40x objective lens if the DFV of a 10x objective lens is 3 mm? Express your answer in μ.
5. When viewing an organism using the 40x objective lens from question 4, you estimate 6 organisms could fit across the DFV if they were laid end-to-end and 20 could fit is stacked side by-side. What is the length and width of this organism (in microns)?
6. What is the DFV of a 25x objective lens if the DFV of a 100x objective lens is 1.5 mm?
7. Using the 100x objective lens from question 6, you
1. Answer: 900x
A typical microscope has two lens: ocular lens which located near the eye, and objective lens which located near the object. The image will undergo magnification of both lens. The total magnification of the object would be the product of both lens multiplication, not the sum. The multiplication will be: 20x * 45x= 900x
total mag= ocular * object
total mag= 20x * 45x
total mag= 900x
2. Answer: 100x
The total magnification of the object would be the product of both lens multiplication. If the total magnification 1000x, that mean it was the product of ocular lens and objective lens. If ocular lens magnification is 10x, objective lens magnification would be:
total mag= ocular * object
1000x= 10x*object
object=1000x/ 10x=
object=100x
3. Answer: 0.2 mm
The area of the microscope that can be viewed by the eye should be the same. But since the magnification is different, the actual area that it represent will be different. Microscope with bigger magnification will have smaller diameter of the field of view(DFV). Remember that micrometer(μm) is 1/1000 of millimeter(mm). The DFV would be:500 μm/ ( 1000x/400x)= 200μm= 0.2 mm
4. Answer: 750μm
This question is similar to number 3 question. Remember that 1 millimeter(mm) equal to 1000 micrometer(μm) .
The DFV of a 10x objective lens is 3 mm. Then the DFV of 40x lens would be:
DFV2= DFV1/ (mag1/mag2)
DFV2= 3mm/ ( 40x/10x)= 0.75 mm= 750μm
5. Answer: 125μm x 37.5μm
The lens DFV of microscope from question 4 is 750μm, so the width and length of the area would be 750μm.
If 6 organisms could fit across the DFV if they were laid end-to-end, the length would be: 750μm/ 6 organism= 125μm
If 20 organism could fit is stacked side by-side, then the width would be: 750μm/ 20 organism= 37.5μm
6. Answer: 6mm
This question is similar to number 3 and number 4 question. Remember that 1 millimeter(mm) equal to 1000 micrometer(μm).
The DFV of a 100x objective lens is 1.5 mm. Then the DFV of 25x lens would be:
DFV2= DFV1/ (mag1/mag2)
DFV2= 1.5mm/ (100x/25x)= 6 mm
7.Using the 100x objective lens from question 6, you estimate 12 organisms could fit across the DFV if they were laid end-to-end and 30 could fit is stacked side-by-side. What is the length and width of this organism (in microns)?
Answer: 0.5mm x 0.2mm or 500μm x 200μm
The lens DFV of microscope from question 6 is 6 mm, so the width and length of the area would be 6 mm.
If 12 organisms could fit across the DFV if they were laid end-to-end, the length would be: 6mm/ 12 organism=0.5mm
If 30 organism could fit is stacked side by-side, then the width would be: 6mm/ 30 organism= 0.2mm
The magnification of microscopy is given by the product of the ocular and objective lens magnification. Diameter of Field of View (DFV) changes inversely with the magnification. The size of an organism is estimated by dividing the DFV by the number of organisms that fit across the view.
Explanation:In microscopy, the total magnification is obtained by multiplying the magnification of the ocular lens and the objective lens.
1. For an ocular lens with magnification 20x and an objective lens with magnification 45x, the total magnification is 20x*45x = 900x.
2. If the total magnification is 1000x and the ocular lens magnification is 10x, the objective lens magnification is 1000x/10x = 100x.
3. DFV decreases with increasing magnification. If the DFV at 400x is 500 μ, then at 1000x, the DFV would be (500 μ * 400x) / 1000x = 200 μ or 0.2 mm.
4. If the DFV at 10x is 3 mm, then at 40x, the DFV would be (3 mm * 10x) / 40x = 750 μ.
5. If 6 organisms fit across the DFV end-to-end at 40x (750 μ), each organism's length is 750 μ / 6 = 125 μ. If 20 organisms fit side by side, each organism's width is 750 μ / 20 = 37.5 μ.
6. If the DFV at 100x is 1.5 mm, then at 25x, the DFV would be (1.5 mm * 100x) / 25x = 6 mm.
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PLEASE ANSWER. E. coli is a species of bacteria that causes many different infections in humans. Certain E. coli strains have developed resistance to antibiotics, making infections with these strains difficult to treat. How do bacteria such as E. coli, which reproduce asexually, gain new traits such as antibiotic resistance?
A.
by undergoing spontaneous mutations when they replicate, which increases genetic variation in a population
B.
by mutating their DNA in response to environmental conditions to gain beneficial traits
C.
by adapting to changes in environmental conditions without undergoing changes in their DNA
D.
by producing offspring with new gene assortments from genetic recombination, which increases diversity in a population
The correct answer is option A. Bacteria like E. coli gain new traits, such as antibiotic resistance by undergoing spontaneous mutations when they replicate, which increases genetic variation in a population.
Option A is correct because bacteria reproduce asexually, and during replication, spontaneous mutations can occur. These mutations introduce genetic variation, which can include traits like antibiotic resistance.
Why other options are incorrect:
Option B is incorrect because. Bacteria don’t intentionally mutate their DNA in response to environmental changes. Mutations occur randomly and are not directed by the environment.Option C is incorrect because. Bacteria adapt through genetic changes, not just by modifying their behavior. Adaptation involves genetic mutations that lead to new traits.Option D is incorrect because. Bacteria reproduce asexually, so they don’t use genetic recombination or gene assortment like sexually reproducing organisms to increase diversity.What biological process allows process allows humans ,mammals,and birds to maintain high body temperatures?
Endotherms and Ectotherms. Humans, along with all other birds and mammals are endotherms, which means that they are animals that actively maintain a stable body temperature by generating heat. People sometimes call endotherms warm-blooded animals
Answer: Endotherms and ectoderms
Explanation:
Mammals like human beings, and many more animals, are endotherms can actively maintain their body temperature by the help of the process known as homeostasis by generating heat.
Such kind of animals are known as endotherms because they can regulate their body temperature.
The reptiles, birds and insects cannot maintain their body temperature so they are known as ectoderms. They are commonly known as cold blooded animals.
Which of the following best explains why what we know about cells is called a theory and not a law
Cell theory explains cell behavior where a law would describe it.
Hope this helps!
-Payshence
D. the answer is D yayaya
what changes to the environment can affect the activity of enzymes
an increase in temperature can increase enzyme activity (but not too high) and a cooler temperature decreases activity, an effect on Ph and this is not so much environment but how many enzymes there are in total
Changes in temperature, pH levels, and substrate concentration can significantly affect the activity of enzymes.
Enzymes are highly sensitive to their environment. Temperature alterations can either increase or decrease enzyme activity. Most enzymes work optimally within a specific temperature range, and deviations from this range can denature or slow down their activity. Similarly, changes in pH levels can alter the ionization of amino acids within the enzyme's active site, affecting its ability to bind with substrates. Enzymes have specific pH optima, and deviations from this optimum can lead to reduced activity.
Substrate concentration impacts enzyme activity. As substrate concentration increases, the rate of enzyme-catalyzed reactions generally rises, but this increase is limited by factors such as the enzyme's saturation point. These environmental factors play crucial roles in regulating enzymatic reactions, making enzymes highly adaptable to different cellular conditions.
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An element has an atomic mass number of 16 and an atomic number of 17. The element has blank protons and blank neutrons.
what I use is APE MAN whiich is atomic number=protons=neutrons
so the protons and neutrons are both 17
Would a line graph or a bar graph be better for showing the number of birds of each color in a population
A bar graph is the best graph to use, it is way much easier than a line graph and it works best.
A bar graph.
When your trying to find the number of birds color in a population it would be best to use a bar graph because, using a line graph is better if it's used for financial buisness.
-A line graph is used to show changed in stuff for exapmle: Amount of money, People lost, Jobs lost, etc.
-A bar graph is basicaly used for graphing the amounnt bought or sold, etc.
List three factors that caused a decrease in the rabbit population?
The density dependent factors are factors whose effects on the size or growth of the population vary with the population density. There are many types of density dependent dependent factors such as; availability of food, predation, disease, and migration. However the main factor is the availability of food.
Decrease in rabbit population can be caused by extreme weather conditions or natural disasters increased predation and decrease in available food resources.
Explanation:There are various factors that can lead to a decrease in the rabbit population. Firstly weather conditions and natural disasters can negatively impact the rabbit population as extreme cold forest fires or floods can lead to mortality regardless of population density. Secondly an increase in predation can lead to a decrease as well. For example if the population of a predator like wolves or coyotes increases it could lead to more rabbits being hunted and thus a decrease in their population. Lastly a decrease in available food resources can also cause the population to decrease as it leads to less successful development and reproduction in rabbits.
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The replication of a parent cell or organism that results in a genetically identical offspring is known as _____.
Hey there!
There are two possible answers to your question.
A. Reproduction.
B. Cell division.
Answer choice A fits the fact of both organisms and cells. This would be your best answer.
Answer choice B fits the fact of cells reproducing. If the sentence had used the term "reproduce' this might be the right answer. But it did not, so...
Your best answer is going to be Reproduction.
A particle can infect humans and make them sick. It attaches to a host cell and injects its RNA, which the host uses to make proteins for the particle. This particle cannot reproduce on its own and can only copy itself by using the machinery of the host.
Which phylum includes animals that lack tissues?
A. Cnidaria
B. Porifera
C. Platyhelminthes
D. Arthropoda
E. Chordata
I would say Porifera
PLEASE HELP I WILL MARK YOU BRAINLYEST!!
Ceres is a rocky celestial body located in the main asteroid belt. It has a nearly spherical shape and orbits the Sun. There are several asteroids in its orbit. Based on this information, which type of body is Ceres?
A. asteroid
B. dwarf planet
C. meteor
D. planet
Answer:
B
Explanation:
why we say that the cell is a complex system
A cell is the basic structural and functional unit of life. A cell is called a complex system because it contains different organelles which play different roles in the cell.
What is a cell?
A cell is the unit of life. Every living organism in this planet is made up of cells. A cell is capable of independent existence. Cells are made up of different molecules and organelles.
Cell is a complex system because it contains the complex structures which are known as organelles that are connected into an extreme complex structure that is the cell. The organelles which are found in cell include mitochondria, endoplasmic reticulum, chloroplast, golgi apparatus, ribosomes, nucleus, etc. Each of these organelles has a specific function to perform which helps the cell to survive.
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Match each extinction to its appropriate characteristic. 1. Cretaceous-Tertiary possibly caused by forest grow on Earth's land surface 2. End Triassic possibly caused by massive rifting of Earth's surface 3. Permian-Triassic the earliest mass extinction on record 4. Late Devonian worst mass extinction in Earth's history 5. Ordovician-Silurian killed off the dinosaurs
Mass extinction refers to the procedure in which a huge number of species gets extinct suddenly.
The following are the correct matches of the events taken place in the mentioned time period:
1. Cretaceous-Tertiary: The mass extinction of dinosaurs took place.
2. End-Triassic: Possibly resulting due to massive rifting of the surface of the Earth.
3. Permian-Triassic: It is considered the worst mass extinction in the history of the Earth.
4. Late Devonian: It is possibly a result of the growth of forest on the land surface of the Earth.
5. Ordovician-Silurian: The earliest mass extinction took place at this time.
What type of graph is best for showing a relationship between two variables? A) pie graph B) bar graph C) line graph D) circle graph
Option C) A line graph is the best option for illustrating the relationship between two variables that are changing, such as displaying economic trends over time.
When it comes to showing a relationship between two variables, a line graph is often the most effective graph to use. This type of graph is particularly useful for illustrating how two variables change in relation to each other. For instance, when tracking economic data such as the unemployment rate over time, a line graph can clearly display the trends and patterns.
In comparison, other types of graphs like a pie graph or bar graph, serve different purposes. A pie graph is best suited for showing how a whole is divided into parts, indicating percentages or proportions. Meanwhile, a bar graph is useful when you want to compare different groups or categories, where the height of each bar reflects a particular value.
Therefore, the correct answer is option C) line graph.
Which of the following plays a major part in determining the type of a volcanic eruption
A. Size of magma chamber
B. Distance form hotspot
D. Magma composition
C. Elevation above sea level
Pls help as soon as possible
Answer:
Magma composition major part in determining the type of a volcanic eruption
Explanation:
A species of frog slowly dies off because it cannot compete with the toads and lizards that share its ecosystem. This is an example of
A species of frog slowly dies off because it cannot compete with the toads and lizards that share its ecosystem is an example of background extinction
how does fever help fight germs
Fever is a state of body in which body temperature is above the normal temperature ( 37 °C).
Due to elevated temperature germs cannot colonize, reproduce and spread disease because their optimum temperature ( 37 °C) is not available due to fever.
Answer:
Every cell requires a particular temperature to grow, even the bacterial cell requires optimum temperature to grow to cause infection inside the human body.
The normal body temperature allows many bacteria to grow inside the body causing infection. But during the time of fever there is a slight elevation in the temperature of the body.
This elevated temperature does not allows the growth of certain bacteria causing infection.This is how fever prevents infection.
When two solvents are separated by a semi-permeable membrane, water flows from low solute concentrations to high solute concentrations. What would happen if external pressure is applied to the solution with higher solute concentration? A) The semi-permeable membrane will lose its activity. B) Water will stop flowing across the semi-permeable membrane. C) Water will flow more freely across the semi-permeable membrane. D) The concentration of solute will become equal on both sides of the membrane.
Answer:
C) Water will flow more freely across the semi-permeable membrane.
Explanation:
Osmosis is the net movement of water molecules from an area of higher water concentration to that of lower water concentration.
Here in this case, an external pressure is applied to the solution with higher 'solute' concentration. If the pressure applied is greater than the osmotic pressure then the direction of water flow through the membrane would be reversed. Therefore, water molecules will flow from the high solute concentration to lower solute concentration.
The option C is the correct option.
Which is water will flow more freely across the semi-permeable membrane.
Explanation:According to the Information given the water will flow from high to low concentration through the process osmosis.If external pressure is applied to the the solution with high concentration.The water will flow from higher pressure to lower pressure same direction as of osmosis.So as a result of this water will flow more freely across the semi-permeable membrane.Jaden’s mass is 50 kilograms. His weight on earth is —— newtons, and his weight on Mars is—— newtons
On Earth, his mass equals his weight. So on Earth he weighs 50 Kg. In Mars you weigh 42 Kg less, which means Jaden weighs only 2 Kg there,.
Hope it helped,
BioTeacher101
A student claims that cellular respiration is essential to cells so that they have a means for getting rid of excess carbon dioxide. What is wrong with his statement?Unlike photosynthesis, cellular respiration occurs in
1. Cellular respiration does not consume carbon dioxide (CO2).
Cellular respiration is a process by which plants produce energy. It consists of anaerobic (without O2) and aerobic phase(with the presence of O2). During the cellular respiration chemical energy derived from the nutrients (like glucose) is transformed into energy molecule adenosine triphosphate (ATP).
2. Unlike photosynthesis, cellular respiration occurs in all eukaryotic organisms (photosynthesis only in plants and some microorganisms). The processes of cellular respiration occur in cytosol (glycolysis) and in the mitochondrion of a cell (Krebs cycle and electron transport chain).
Answer:
cellular respiration does not consume carbon dioxide
Explanation:
Which statement explains how gravity and inertia work together
The Answer is A on edugenity
What is happening when the cells start to swell up with water
the cell goes into osmosis and goes into hypnotic solution
Answer:
The correct answer is cell will burst.
Explanation:
When a cell takes up water from the environment it will swell up and will become flaccid. This usually happens when a cell is placed in the hypotonic solution with a high concentration of water outside and low solute and the water will move into the cell through osmosis.
If the excess water is not removed from the cell the cell will burst or lyse.
Thus, the cell will burst is the correct answer.