Which is a component of cell theory
Answers
Answer:
The generally accepted parts of modern cell theory include: All known living things are made up of one or more cells. All living cells arise from pre-existing cells by division. The cell is the fundamental unit of structure and function in all living organisms.
2. The cell is the most basic unit of life
Schneider’s theory of free cell formation through crystallization was refuted in the 1850s by Robert Remak, Rudolf Virchow, and Albert Kolliker.[7] In 1855, Rudolf Virchow added the third tenet to cell theory. In Latin, this tenet states Omnis cellula e cellula.[10] This translated to:
3. All cells arise only from pre-existing cells
However, the idea that all cells come from pre-existing cells had in fact already been proposed by Robert Remak; it has been suggested that Virchow plagiarized Remak and did not give him credit.[16] Remak published observations in 1852 on cell division, claiming Schleiden and Schawnn were incorrect about generation schemes. He instead said that binary fission, which was first introduced by Dumortier, was how reproduction of new animal cells were made. Once this tenet was added, the classical cell theory was complete.
Related Questions
Hello people ~
If natality is balanced by mortality in a population at a given time, there will be a/an
(a) decrease in the population size
(b) increase in the population size
(c) zero population growth
(d) population explosion
Answers
(c) zero population growth
natality - birth rate
mortality - death rate
when birth rate and death rate are equal. the population remains constant and does not change. nor increase nor decrease.For example, the birth rate in a country is 500 and death rate is 500. both balanced. 500 - 500 = 0, zero growth in population.
What do scientists call the
temperature at which
condensation will begin?
A. condensation time
B. cloud point
C. fog level
D. dew point
Answers
Answer:
Dew Point
Explanation:
When the air temperature drops below its dew point, extra moisture will be released in the form of condensation. Dew is basically condensed water in the atmosphere.
A cliff near the water has been worn away. How did erosion change the shape of the land?
The cliff now extends much further out into the sea.
The cliff slopes smoothly down toward the beach.
The top of the cliffs is more rounded and smoother.
Rocks from the cliff have been moved toward the sea.
Answers
How is the function of cell division in single-celled organisms different from cell division in multicultural organisms?
Answers
Answer:
answer
Explanation:
All of the major components of the light reactions, including the pigment molecules
clustered in photosystems I and II, are located in the thylakoid membrane. What is the advantage of
having these components confined to the same membrane rather than dissolved in the stroma or the
cytosol/cytoplasm? Explain your argument. (up to 5 points)
Answers
Answer:
Having the light reaction components in close proximity speeds up the process. Electrons move from one protein to the next in sequence. If the proteins had to 'swim' around to find the next part of the electron transport chain, then the ATP would form at a much slower, inefficient rate.
CAN ANYONE ANSWER THIS?is anaerobic applicable to only animal, only to plant, or both? why?
Answers
Answer:
Explanation:
In anaerobic respiration, the end-products are ethanol and carbon dioxide in plants whereas the end-products are lactic acid only in animals. Thus, the anaerobic respiration in plants is associated with evolution of carbon dioxide as in aerobic respiration, though it occurs in the absence of oxygen but no carbon dioxide is evolved in anaerobic respiration in animals.
Please help, it's a test question!!!
Describe at least two advantages and at least two disadvantages of using embryonic stem cells to repair damaged tissue due to injury or disease. Be sure to use a topic sentence and conclude with a summary
Answers
Because embryonic stem cells are pluripotent stem cells, they can differentiate into any kind of body cell or more stem cells.
Disadvantages of using embryonic stem cells include possibility of development of teratocarcinomas , and chances of rejection by immune system.Advantages of embryonic stem cells include that they can develop into different germ layers and easy collection.
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Wells
A. Lane B
B. Lane D
C. Lane C
D. Lane A
80 70 60 40
。 |||
|
c| | || |
I
80%
Electrodes
Agarose Gel
A
25 10 5
||
||
Lane (D) of Known
fragment sizes.
Kilobase pairs
Chamber filled with
Unknown DNA size samples buffer solution
Answers
By comparing the migration distances of the unknown DNA samples in Lane D with the known fragment sizes in Lane D, it is possible to estimate the size of the unknown DNA fragments.
In the given information, a DNA agarose gel electrophoresis setup is described. The gel contains wells labeled A, B, C, D, and E, and lanes are represented by letters A, B, C, and D. The numbers 80, 70, 60, and 40 indicate the known fragment sizes (in kilobase pairs) in Lane D.
The gel is filled with a buffer solution, and the Lane D contains the unknown DNA samples.To analyze the unknown DNA samples, the gel electrophoresis process is conducted. DNA samples are loaded into the wells of the gel, and an electric current is applied.
The negatively charged DNA fragments move through the gel towards the positively charged electrode. The smaller fragments migrate faster, while the larger fragments move more slowly.
If the unknown DNA fragments migrate to positions that align with the known fragment sizes, it suggests a similarity in size between the unknown fragments and the known fragments. This information can be useful for determining the approximate size of the unknown DNA samples.
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What makes a dominant allele different from a recessive allele
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Where does the organic material in soil originate? a. physical weathering b. chemical weathering c. decomposing plant and animal matter d. the atmosphere please select the best answer from the choices provided a b c d
Answers
Organic material in soil originate from decomposing plant and animal matter. Microbes decompose dead organisms so that their nutrients go into the soil and are further used by others.
In an ecosystem, plants need resources like water, carbon dioxide, soil minerals, and others to create food, whereas heterotrophs like people and animals like goats deplete the plants' supplies of these substances. Following their demise, these plants and animals become food for bacteria, which break them down and release nutrients into the soil. Plants and other living things can then absorb these nutrients, reintroducing them into the ecosystem.
Different organic compounds and molecules, such as carbon, nitrogen, and others, remain in the soil and then reach the atmosphere in various ways. Animal feces contain organic material, which also makes its way into the soil.
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6
Cameron reads in his textbook that animal cells are composed of 90 percent water and 10
percent protein, carbohydrate, nucleic acid, lipid, and other molecules. He learns that
homeostasis is the process by which this composition is maintained. How does an organelle
in an animal cell control the content of water and other material in the cell?
F The cell wall splits apart to allow water and materials to enter the cell and waste
products to leave the cell.
G The cell membrane is selectively permeable, which controls the movement of materials
in and out of the cell by passive and active transport.
H Vacuoles in the cell open and draw in only the materials needed from outside the cell.
J
Lysosomes move out of the cell to capture and bring back needed materials.
7
Models of the human immunodeficiency virus (HIV) and an animal cell are shown below.
Answers
Answer:
The cell membrane is selectively permeable, which controls the movement of materials in and out of the cell by passive and active transport.
Explanation:
According to this question, animal cells are made up of the following contents: 90% water and 10% protein, carbohydrates, nucleic acid, lipids and other molecules. The cell regulates this internal composition in a stable way via a process called HOMEOSTASIS.
The animal cell is able to regulate or maintain a stable internal composition by the possession of a selective permeable membrane called CELL MEMBRANE. The cell membrane is semi-permeable in the sense that it allows the entry of some molecules into and out of the cell and blocks others.
Some molecules are allowed by the cell membrane without the need for energy input in a transport called PASSIVE TRANSPORT while some requires energy input in a transport called ACTIVE TRANSPORT.
The sac-like shape of lipocytes allowing them to expand to store more fat is an example of the following theme in biology?
Question 16 options:
homeostasis
evolution
structure relates to function
cells theory
Answers
what is the connection between inhumane farming methods and ill-health? Explain.
Answers
Answer:
Various inhumane farming practices are found to be taking place that affects the health of animals, make them weak and are often left to die in the diseased condition. This promotes production but at the same time also makes them sick and unhealthy.
Explanation:
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Pls fill in the blank. Ty
Answers
In which of the following places will the soil contain plenty of water and nutrients?Why?a) Desertb) Forestc) Beach
Answers
Answer:
forest and beach
Explanation: because water absorbed by forest soil is protected from the sun and less likely to evaporate, and water absorbed by beach soil is exposed to the sun and evaporation but unlike desert soil, water levels in beach soil are being consistently replenished.
Plants and animals have structures, behaviors, and other traits called adaptations that help them to survive. For example, the gills of a fish are an adaptation for living under water, while lungs are an adaptation to living on land. Switch to the LANDSCAPE tab, choose One location, and check that New York is selected. Click on the deer, squirrel, and oak tree to learn about each organism. Describe one way that each organism is adapted to live in New York’s climate. Organism Adaptation White-tailed deer Eastern gray squirrel Northern red oak
Answers
The white-tailed deer is well adapted to living in New York's climate due to its thick fur coat.
What is adaptation?The process of evolution whereby an organism improves its capacity to survive in its habitat or habitats is known as adaptation.
White-tailed deer: Thanks to its thick fur coat, the white-tailed deer is well acclimated to the environment of New York.
The deer's fur provides insulation in the winter and keeps it warm in the chilly weather, while in the summer it offers shade and regulates the deer's body temperature.
Eastern gray squirrel: The Eastern gray squirrel has a thick, fluffy tail that it employs for stability while climbing trees and that also serves to keep it warm in the winter.
Red oak in the north: Red oaks in the north have robust, deep roots that enable them to draw water and nutrients from the soil's depths.
Due to their adaptation, they are better able to survive environmental stresses like drought, which are frequent in New York's climate.
Thus, these are the ways that each organism is adapted to live in New York’s climate.
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optimal control of natural ventilation as passive cooling strategy for improving the energy performance of building envelope with pcm integration
Answers
Optimal control of natural ventilation, combined with the integration of Phase Change Materials (PCMs), can be an effective passive cooling strategy for improving the energy performance of a building envelope.
Here are some key points to consider:
Natural Ventilation: Natural ventilation involves the controlled movement of air through a building using openings such as windows, vents, or other openings. By strategically managing the airflow, natural ventilation can help remove heat from the building and promote cooling.Optimal control of natural ventilation involves adjusting the opening sizes, positions, and timing to maximize the cooling effect while minimizing energy consumption.
Phase Change Materials (PCMs): PCMs are substances that can store and release large amounts of thermal energy during phase transitions, such as from solid to liquid or vice versa. They can absorb excess heat during the day and release it at night when the ambient temperature is lower. Optimal Control Strategies: To optimize the natural ventilation and PCM integration for passive cooling, several control strategies can be implemented:Modeling and Simulation: Building energy modeling and simulation tools can be employed to assess the effectiveness of different control strategies, evaluate the impact on energy consumption, and optimize the design parameters for natural ventilation and PCM integration.By combining optimal control of natural ventilation with PCM integration, the energy performance of the building envelope can be significantly improved. This approach allows for passive cooling, reducing reliance on active cooling systems and consequently reducing energy consumption and associated costs.
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Correct question is :
optimal control of natural ventilation as passive cooling strategy for improving the energy performance of building envelope with pcm integration. EXPLAIN.
What can archaeological studies (particularly of the Mesolithic) tell us about prehistoric adaptations to climate change?
2) What can this tell us about our struggles with climate change today?
3) What specific challenges did Mesolithic people face as they confronted climate change that we don't today? What specific challenges do we have today that Mesolithic people didn't have to deal with?
4) How can archaeologists (and their specialized knowledge of the past) influence the climate change debate?
Answers
the Archaeological studies of the Mesolithic period can reveal a lot about prehistoric adaptations to climate change. This provides Archaeological studies (particularly of the Mesolithic) can tell us about prehistoric adaptations to climate change by revealing how prehistoric populations.
By analyzing fossils, pollen, soil samples, and other indicators, archaeologists can recreate past environments, ecosystems, and subsistence practices. They can see how people adapted to climate-induced changes in vegetation, water sources, and animal migrations. For example, changes in hunting strategies, toolmaking techniques, and settlement patterns are often related to shifts in climate.
Specific challenges we have today that Mesolithic people didn't have to deal with include the large-scale burning of fossil fuels, which is contributing to the warming of the planet. This is a challenge that requires global cooperation and political will to address. Archaeologists and their specialized knowledge of the past can influence the climate change debate by providing a long-term perspective and demonstrating the impact of human activities on the environment. They can also contribute to interdisciplinary research that brings together scientists, policymakers, and community stakeholders to develop strategies for mitigating and adapting to climate change. Additionally, they can help to preserve cultural heritage sites that are threatened by climate change.
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The element with atomic number of 4 is
Answers
Answer:
Beryllium is the element with the atomic number 4.
a child is noted to have recurrent respiratory infections that necessitate hospitalization. his laboratory tests demonstrate a decrease in t cells, b cells, and nk cells. he has decreased levels of circulating antibodies and is diagnosed with severe combined immunodeficiency. the enzyme that is defective in this disorder is important in which one of the following processes?
Answers
In severe combined immunodeficiency, the deficient enzyme is essential for a process that mediates: (C) the breakdown of adenosine.
Immunodeficiency refers to a condition where components of the immune system are missing from the body. These example of components are lymphocytes, macrophages, antibodies, phagocytes, etc. Severe combined immunodeficiency is a very rare genetic disease in which the genes of the immune cells are mutated
Adenosine is a purine nucleoside. It is most often present in the body in the form of adenosine triphosphate (ATP). It is the main ingredient of energy. It is one of the most important building blocks of RNA.
The given question is incomplete, the complete question is:
The child has been diagnosed with recurrent respiratory infections that require hospitalization. his lab tests show decreased t, b, and nk cells. has decreased levels of circulating antibodies and has been diagnosed with severe combined immunodeficiency. In which of the following processes is the defective enzyme important in this disease?
(A) The conversion of ribonucleotides to deoxyribonucleotides
(B) The de novo synthesis of AMP
(C) The degradation of adenosine
(D) The de novo synthesis of UMP
(E) The conversion of dUMP to dTMP
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how do relevant resonance structures for atp/pi affect reactivity?
Answers
Relevant resonance structures for ATP/PI affect reactivity by stabilizing the molecule and making it more likely to participate in chemical reactions.
The presence of multiple resonance structures allows for the delocalization of electrons, which reduces the overall energy of the molecule and makes it more reactive. This reactivity is crucial for the molecule's role in cellular energy transfer and other metabolic processes.
Additionally, the resonance structures allow for the transfer of phosphate groups, which is important for the regulation of enzymatic activity and signal transduction pathways.
Overall, the presence of relevant resonance structures in ATP/PI enhances its reactivity and enables its essential biological functions.
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Which describes the main purpose of RNA polymerase during transcription?
A. RNA polymerase is guided to the coding region.
B. RNA polymerase produces mRNA from DNA.
C. RNA polymerase pulls apart the double helix.
D. RNA polymerase reaches the end of the gene.
Answers
Explanation:
RNA polymerase reaches the end of a gene. Which describes the main purpose of RNA polymerase during transcription? ... RNA polymerase reaches the end of the gene. RNA polymerase produces mRNA from DNA
Answer:
it's D
Explanation:
What are the answers to “What Are The Steps in The Scientific Method?
Answers
Like the steps to the scientific method?
1. Define a Question to Investigate. As scientists conduct their research, they make observations and collect data. ...
2. Make Predictions. Based on their research and observations, scientists will often come up with a hypothesis...
3. Gather Data. ...
4. Analyze the Data. ...
5. Draw Conclusions.
What is the constant of “Which bait works best for a homemade fly trap?” Plz answer quick!!!!
Answers
Answer:
Mix scraps of meat (the older, the better) with something sweet (see list below). Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination.
Hope this helps!
Please give me brainliest if this helped you!
Answer:
Mix scraps of meat (the older, the better) with something sweet (see list below). Lots of people swear by using rotten fish or shrimp, which probably work best because they smell so much. Bait for Fruit Flies: Use fruit (the riper, the better), apple cider vinegar, fruit juice, syrup, wine, beer, or any combination.
Describe the three components that make up the structure of the atom, including their charge and specific locations within atom.
Answers
Electrons are negatively charged and protons are positive. Neutrons are neutral between the two. The electrons are on the outside of the atom constantly moving(outside of nucleus)the protons and neutrons are in the nucleus.
The three components that make up the structure of the atom are as follows:
Electrons (Negatively charged sub-atomic particles). Protons (Positively charged sub-atomic particles).Neutrons (Neutrally or no charge). What is the nucleus of an atom?The nucleus of an atom may be defined as the center of any atom that significantly consists of protons and neutrons.
Due to the positive charge on protons and neutral charge on neutrons, the nucleus of an atom is found to be positively charged.
The electrons are negatively charged sub-atomic particles which are always revolving around the nucleus of an atom.
While protons are positively-charged sub-atomic particles that are present in the nucleus of an atom. And Neutrons are neutral or no charge sub-atomic particles that are present in the nucleus of an atom along with protons.
Therefore, the three components of atom has been significantly described with respect to their charge and specific locations within atom.
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How does this behavior affect survival of the elephant population?
Answers
It increases the chances the calf will live to reproduce. So, the correct option is (C).
Why is behavior important for animal survival?
Behaviors that help animals or their young survive increase the fitness of the animal. Animals with higher fitness have a better chance that their genes are passed on to the next generation. If these genes control behaviors that increase fitness, then the behaviors become more common across the species.
The four types of Animal Behavior are:
1. Instinct
2. Imprinting
3. Conditioning
4. Imitation
Innate behavior and learned behavior are the two main categories of animal behavior where behaviors that animals do spontaneously, such as reflexes or sucking, are called innate behaviors while behaviors that animals must learn over time, such as social interaction and feeding, are called learned behavior.
Thus, it increases the chances the calf will live to reproduce. So, the correct option is (C).
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Your question is incomplete, most probably the complete question is :
How does this behavior affect survival of the elephant population?
O A. It increases the chances that the adult elephants will find mates.
O B. It marks the territory so predators stay away from the elephants.
O C. It increases the chances the calf will live to reproduce.
OD. It communicates to the calf the best way to reproduce.
What type of transport was shown in the second animation?
A. active transport with the help of transport proteins
B. passive transport by simple diffusion across the membrane
C. passive transport by facilitated diffusion with the help of transport proteins
Answers
Answer:
C. passive transport by facilitated diffusion with the help of transport proteins
Explanation:
The electron transport chain (shown in the second animation) establishes a proton gradient across the inner mitochondrial membrane. ATP synthase uses the energy stored in the proton gradient to catalyze the synthesis of ATP. The molecular machinery involved in this process converts chemical energy to mechanical energy and provides a great example of the relationship between the structure and function of macromolecules.
Answer:
C. passive by facilitated diffusion with the help of transport proteins
Explanation:
Passive transport is a type of membrane transport that does not require energy to move substances across cell membranes.
Why coocked food spoil fast but uncocked food spoil slowly
Answers
Cooked food is bruised, denatured and cut up so that more surface area of the food is available to air and bacteria. Naturally, bacteria has an advantage here compared to an unprocessed food. This is why a cooked food can be more susceptible to spoilage than an uncooked food.
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Related Questions (More Answers Below)
6. Let the hemoglobin levels of healthy men be a random variable, \( \mathrm{X} \). According the National Library of Medicine hemoglobin levels of healthy men are normally distributed with a mean of
Answers
According to the National Library of Medicine, the hemoglobin levels of healthy men are normally distributed with a mean (μ) and a standard deviation (σ). The normal distribution provides a mathematical model to understand the distribution of these hemoglobin levels and make statistical inferences based on their values.
Let's denote the random variable representing the hemoglobin levels of healthy men as X. According to the National Library of Medicine, these hemoglobin levels are normally distributed with a mean (μ) and a standard deviation (σ).
In statistical terms, we can express this as:
X ~ N(μ, σ)
The mean (μ) represents the average hemoglobin level of healthy men. It is the central value around which the distribution is centered. The standard deviation (σ) measures the variability or spread of the hemoglobin levels. A larger standard deviation indicates a wider range of values from the mean.
Being normally distributed means that the values of X follow a bell-shaped curve known as the normal distribution. The normal distribution is symmetrical, with the mean at the center and the probabilities of different values decreasing as we move away from the mean. The shape of the curve is determined by the values of μ and σ.
The normal distribution is a widely used statistical model that allows us to make various predictions and calculations about the hemoglobin levels of healthy men. For example, we can calculate the probability of a man having a hemoglobin level within a certain range or estimate the percentage of men with hemoglobin levels above or below a specific value.
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Coal formation started even before there were dinosaurs on the earth TRUE or FALSE.
Answers
Answer:
This is true
Explanation:
Because coal has been around since nearly the beginning of time
Answer:
true
Explanation:
Coal was formed millions of years ago, before the dinosaurs. Coal is called a fossil fuel because it was made from plants that were once alive! Since coal comes from plants, and plants get their energy from the sun, the energy in coal also came from the sun. The coal we use today took millions of years to form.