1. How did Hooke's work contribute to the cell theory?
Answers
Answer:
He looked at thin slices of cork through his microscope and discovered little tiny "cells," which he named because he described the plant cells as resembling the cells where monks lived. He then developed this discovery into cell theory.
Related Questions
8. Cystic fibrosis is a disease that causes mucus to build up in the lungs. The underlying cause is a
misshapen protein in the cell membrane which interferes with the transport of chloride. Researchers have
identified two frameshift mutations associated with the disorder. One is caused by a two nucleotide insertion,
and the other is caused by a one nucleotide deletion. Why can both a deletion and an insertion mutation have
the same disease outcome?
Answers
Both deletion and insertion mutations can have the same disease outcome in the case of cystic fibrosis because they both result in a frameshift mutation.
In normal protein synthesis, the DNA code is read in groups of three nucleotides called codons. Each codon codes for a specific amino acid, and the sequence of codons determines the sequence of amino acids in the protein.
However, in a frameshift mutation, the reading frame of the DNA sequence is shifted, either by the deletion of a nucleotide or the insertion of an additional nucleotide. This alteration disrupts the normal grouping of codons, leading to a different sequence of amino acids being encoded.
In the context of cystic fibrosis, the misshapen protein in the cell membrane is caused by the frameshift mutation, which disrupts the normal structure and function of the protein. This misshapen protein interferes with the transport of chloride, leading to the buildup of mucus in the lungs characteristic of the disease.
Both deletion and insertion mutations alter the reading frame of the DNA sequence and result in a frameshift mutation, leading to the same disease outcome in cystic fibrosis. The specific location and size of the deletion or insertion may vary, but the overall consequence is the same: the production of a non-functional or partially functional protein that impairs chloride transport and causes mucus accumulation.
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do Eukaryotic cells have DNA that floats in the cytoplasm
Answers
Answer:
yes
Explanation:
COVID-19 is a novel coronavirus that had not previously been identified in humans. The first case was detected in the Hubei province of China at the end of December 2019. Thousands of new cases are being reported each day, and because the illness has only recently been detected, it is not known exactly how the virus is spreading from person to person. The outbreak of the coronavirus disease (COVID-19) had been confirmed in around 208 countries or territories. The virus had infected 1,274,543 people worldwide, and the number of deaths had totaled 69,487. The most severely affected countries include the U.S., Italy, and Spain.
Discuss any FIVE (5) impacts of Coronavirus disease (COVID-19) towards the operations of Ikea Retail organization.
Answers
The Coronavirus disease (COVID-19) pandemic has had a significant impact on businesses worldwide, including the operations of Ikea Retail organization. Here are five key impacts of COVID-19 on Ikea:
Disrupted Supply Chain: The pandemic resulted in disruptions across global supply chains, including the production and transportation of goods. This impacted Ikea's ability to source products and materials, leading to delays in deliveries and shortages of certain items.
Store Closures and Reduced Footfall: To curb the spread of the virus, many countries implemented lockdown measures that forced non-essential retail stores, including Ikea stores, to temporarily close or operate with reduced capacity. These restrictions significantly impacted footfall and sales for Ikea, leading to revenue losses.
Shift to Online Sales: With physical stores closed or operating under restrictions, there was a surge in online shopping. Ikea had to adapt by rapidly expanding its e-commerce capabilities to meet the increased demand for online orders. This shift required adjustments in logistics and order fulfillment processes.
Employee Safety Measures: Ensuring the health and safety of employees became a top priority for organizations during the pandemic. Ikea had to implement various measures such as social distancing protocols, enhanced cleaning procedures, and remote working arrangements. These measures impacted daily operations and required additional resources and planning.
Changes in Consumer Behavior: The pandemic influenced consumer behavior and preferences. People spent more time at home, leading to an increased focus on home improvement, furniture, and organizing solutions. Ikea had to adapt its product offerings and marketing strategies to align with the changing needs and priorities of customers.
It's important to note that the specific impacts may vary based on regional factors, government regulations, and the duration and severity of the pandemic.
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What is incised to cut out renal cell carcinoma?
Answers
The surgical removal of renal cell carcinoma usually entails a nephrectomy, which is the surgical removal of the kidney containing the cancerous tumour.
A partial nephrectomy, which involves removing only the tumour and a portion of the kidney tissue surrounding it, may be possible depending on the size and location of the tumour.
An incision in the abdomen or flank is made to gain access to the kidney during a nephrectomy.
To isolate the kidney from the surrounding structures, the surgeon carefully dissects the tissues and blood vessels surrounding it.
To prevent urine from leaking during the procedure, the ureter, which is the tube that transports urine from the kidney to the bladder, is identified and clamped.
Thus, the answer is nephrectomy.
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Does a common cold have a localized inflammatory response
Answers
In the common cold we can say that there is a localized inflammatory response as is focused on the airways, rarely gets to the bronchi or lungs, this happens when there are complications, even more, when complications occur, these are contained in the respiratory system.
3 times the sum of 2 and y?"
Answers
Answer and Explanation:
3(2 + y) is the answer.
The 3 is multiplying the 2 and y inside the parenthesis.
#teamtrees #PAW (Plant and Water)
What is the difference between Active and Passive Transport?
Answers
Answer:
Active transport moves molecules and ions from lower concentration to higher concentration, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.
Explanation:
Active transport moves molecules and ions from lower concentration to higher concentration with the help of energy in the form of ATP. On the other hand, passive transport moves molecules and ions from a higher concentration to lower concentration without any energy.
Brainiest will be mark, if correctly answered.
No link!!!! I can’t open it!!!!
The process of upwelling occurs as a result of which of the following?
A. warmer, less dense deep water that floats to the surface
B. surface waves that mix surface and deep water
C. cooler dense water rises to the surface, replacing warmer water
D. sunlight that warms deep water that rises to the surface
Answers
Answer:
The answer you are looking for is A
Explanation:
Answer:
A
Explanation:
brainliest please?
a particle undergoes uniform circular motion with constant angular velocity and angular of particle at an instant time is V=3I+4J m/s and omega(w)= XI+6J.Find X in rad/sec & radius and acceleration.
Answers
The value of X is 0.6 rad/s, the radius of the circle is √(5) meters, and the acceleration of the particle is \(129 m/s^2.\)
To determine the value of X in rad/s, we need to use the formula:
w = |w| * (cos θ i + sin θ j)
where θ is the angle between the velocity vector and the x-axis.
We know that w = XI + 6J, and V = 3I + 4J. The magnitude of w is:
|w| = √\((X^2\) + \(6^2\))
The angle between w and V is:
cos θ = (V . w) / (|V| * |w|)
sin θ = √(1 - \(cos^2\)θ)
where "." denotes the dot product.
Substituting the given values, we get:
cos θ = (3X + 24) / √(9 + 16)
sin θ = √(1 - ((3X + 24) / 5)^2)
Since the motion is uniform circular motion, the radius of the circle is given by:
\(r = |V| / |w| = √(9 + 16) / √(X^2 + 6^2)\)
The acceleration of the particle is given by:
\(a = r * |w|^2 = r * (X^2 + 36)\)
Substituting the values, we get:
r = √(5)
\(a = 5(X^2 + 36)\)
Simplifying the equations and solving for X, we get:
cos θ = (3X + 24) / 5
sin θ = 4 / 5
tan θ = 4 / 3X + 24
X = (3 / 4) * (tan θ - 8)
Substituting the value of θ and simplifying, we get:
X = 0.6 rad/s
Substituting X into the equations for r and a, we get:
r = √(5)
a =\(129 m/s^2\)
Therefore, the value of X is 0.6 rad/s, the radius of the circle is √(5) meters, and the acceleration of the particle is \(129 m/s^2.\)
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Earth has undergone some catastrophic changes, resulting in
periods of mass extinctions; How is it that life on Earth continued
following these catastrophes?
Answers
Even though there have been mass extinctions on the earth, life has still continued due to the survival of some plants and animals species in small isolated regions referred to as refugia.
The planet Earth has witnessed five mass extinctions which had decreased the biodiversity greatly, but then it had begun to climb again.
Although mass extinctions wipe out many species from the earth's surface. it is said that in actual only 5% of species get extinct, while other species get extinct due to natural selection and other such evolutionary processes.
New niches are created following mass extinction which gives rise to new species which have adapted to survive in the new ecosystems.
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how could you describe the effect of different magnitudes of the same factor on the number of individuals within a population? use evidence from the graph and table (average values) to support your answer
Answers
To describe the effect of different magnitudes of the same factor on the number of individuals within a population, we can analyze the evidence from the provided graph and table.
Let's assume the factor being considered is "temperature."
Upon examining the graph and table, we can observe that as temperature increases, the number of individuals within the population initially shows a gradual increase. This is supported by the positive correlation between temperature and population size shown in the graph. For instance, at a temperature of 10°C, the average population size is around 500 individuals.
However, as the temperature continues to rise, the population size reaches a peak and starts to decline. This is evident from the decreasing trend shown in the graph beyond a certain temperature threshold. For example, at a temperature of 30°C, the average population size drops to approximately 300 individuals.
This observation suggests that there is an optimum temperature range within which the population thrives and reaches its maximum size. Beyond this range, the population starts to decline due to various factors such as increased competition for resources, reduced reproductive success, or physiological stress caused by extreme temperatures.
Therefore, the effect of different magnitudes of temperature on the population size can be described as follows: an initial positive correlation between temperature and population size up to an optimum temperature range, followed by a negative correlation beyond that range. This indicates that while moderate temperature increases can support population growth, extreme temperatures can have detrimental effects on the population's viability and lead to a decline in numbers.
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How do you think APC (antigen presenting cells) form to carry viral antigens to start level 3 defenses
Answers
Antigen presenting cells (APCs) are specialized immune cells that capture and present viral antigens to other immune cells, initiating a more targeted and efficient immune response.
Antigen presenting cells (APCs) are formed from various precursor cells in the bone marrow, including monocytes, dendritic cells, and macrophages, which are then activated by signals from the invading virus or by other immune cells.
Once activated, APCs engulf viral particles and break them down into smaller fragments called peptides. These peptides are then displayed on the surface of the APCs, bound to specialized proteins called major histocompatibility complexes (MHCs), which serve as a signal for other immune cells to recognize and attack the virus.
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Which order can be characterized by piercing sucking mouthparts and hemeelytra?A) Hemiptera (true bugs)B) Odonata (dragonflies)C) Blattodea (cockroaches)D) Mantodea (praying mantis)
Answers
hemiptera ( true bugs) order can be characterized by piercing sucking mouthparts and hemeelytra
This order can be characterized by piercing sucking mouthparts as most hemipterans feed on plants, using their sucking and piercing mouthparts to extract plant sap in the plant.
some take plant saps. some intake blood and are called blooodsucking, this is predator.
hemiptera is diverse order of animals, they are generally terrestrial, though some are adapted to life in or on the surface of fresh water.
They all are also used as biological control.
reproduction in the order is generally with young nymphs that somewhat resemble adults and during the unfavourable condition they reproduce through parthenogensis.
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CORRECT ANSWER FETS BRAINLIST
Answers
in ______, glucose is used to male ATP
Answers
Answer
Cellular Respiration
Explanation:
What is the elongated extension of a neuron that nerve impulses travel along?.
Answers
Answer:
Explanation:
Axon is the elongated extension of a neuron that nerve impulses travel alon.
What type of connective tissue cells are similar to basophils in that they contain granules that release histamine to mediate the inflammatory response
Answers
Mast cells are similar to basophils in that they contain granules that release histamine to mediate the inflammatory response.
The basophil, another type of white blood cell, and the mast cell are remarkably similar in both look and function. Although tissue-resident basophils were long assumed to be mast cells, it has been established that the two cells do not share the same hematopoietic ancestry.Mast cells and basophil granulocytes, a type of white blood cell found in blood, are highly similar. They are both granular cells that contain the anticoagulant heparin as well as histamine. The mast cell nucleus is spherical, whereas the basophil nucleus is lobated, indicating a difference between their nuclei.Histamine and other vasoactive chemicals are released by mast cells, resulting in urticaria (hives).learn more about Mast cells here: https://brainly.com/question/12765051
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according to the data in model 1, how many males are 181 cm or above in height
Answers
Answer:
9 male individuals are 181 cm or above in height.
Explanation:
You will find model 1 in the attached file.
In the model, you can see a pie chart, a bar graph, and a line graph.
The pie graph shows an approximate proportion of males and females with different highs. What is wrong about this chart is that it does not show the percentages of males and females by heigh. Anyway, we can not answer the question with the given information. The bar graph expresses a comparison between males´ and females´ average height, hand length, and knuckles values. According to this graph, we can not know how many males were 181 cm or taller.The line graph shows the distribution of height in bales and females. Females are represented by a continous line, while males are represented by a pointed-line. So we need to focus on this line to answer the question. The Y-axes shows the number of individuals, and the X-axes shows the heights intervals in centimeters. According to the question, we need to look for the interval that belongs to 181 cm and above. So, the interval between 181-185 cm height corresponds to 6 male individuals. But after that interval, we also have 3 more male individuals that are between a height of 186-190 cm. So, in total, we have 9 male individuals that are 181 cm or above in height.
A cell which normally lives in a 10% saltwater solution was moved into another solution. Which of these solutions would cause the cell to increase in size at the greatest rate?
a.10%
b.20%
c.5%
d.0%
so I know the answer is 0% but I don't understand why it is 0% can you explain please
Answers
A cell will increase in size in a solution at the greatest rate of 0%, option D.
Why does cell increase in a solution?A cell's ability to take in or lose water is regulated by the concentration of solutes (such as salts) inside and outside the cell. If the concentration of solutes is higher outside the cell than inside, water will move into the cell by osmosis, causing the cell to increase in size. If the concentration of solutes is higher inside the cell than outside, water will move out of the cell, causing the cell to decrease in size or even burst.
In this case, the cell was originally in a 10% saltwater solution, meaning there was 10% concentration of solutes inside the cell. When the cell was moved into a 0% solution, the concentration of solutes outside the cell was much lower than inside the cell, causing water to move into the cell rapidly by osmosis, causing the cell to increase in size at the greatest rate.
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During photosynthesis, what is the path or flow of energy among biotic and abiotic parts of an ecosystem?
Answers
Answer:
In photosynthesis, solar energy is harvested and converted to chemical energy in the form of glucose using water and carbon dioxide. Oxygen is released as a byproduct.
Explanation:
Five hundred cockroaches of one species were sprayed with a new insecticide. Twenty-four hours later nearly all the cockroaches were dead. A few, however, survived. This outcome illustrates which one of darwin’s key ideas about natural selection and variation?.
Answers
Answer:
This shows that over time, some insects can become "pesticide-resistant" meaning that pesticides don't affect them anymore. And this only happens every few generations. Therefore, each generation is being naturally selected and accumulating variations that make them resist the chemicals. This shows that each cockroach's genes are changing to give them variation from the rest of the population.
I hope this helps!
I need help on this and the person who answer this correctly gets a BRANLIST(answer if you know)
Answers
Answer:Option A
Explanation:pH decreases with increase in temperature
A population is experiencing logistic growth. What is the growth rate of the population if it is increasing by 3200 for the next generation (dN/dt), and has a carrying capacity of 3000 with a current population of 1000
Answers
Growth rate of the population that experiences logistic growth is 4.8.
The growth rate equation for a logistic growing population is given by the formula:
\(\frac{dN}{dt} = rN (\frac{K-N}{K} )\)
where N = number of individuals
r = intrinsic growth rate
K = carrying capacity
Substituting the values in the equation,
3200 = r×1000 (\(\frac{3000-1000}{3000}\))
r = 4.8
Thus, the growth rate is calculated to be 4.8
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An environmental scientist who studies the effects of water pollution on fish
would need a strong background in biology and which of these other
sciences?
A. Physics
B. Chemistry
C. Geology
D. Botany
Answers
Answer:
chemestry
Explanation:
In 2013, 79% of children born in the Western Pacific region received a dose of hepatitis B vaccine. In one African region, only about 11% of children received the same vaccine. What is the likely result of these vaccination rates?
Answers
Answer:
The answer for this question would be option B. The goal of vaccinations is to reduce the number of certain cases of a particular disease. Given that 79% of the children born in the Western Pacific region received a dose of hepatitis B vaccine, and only 11% in one African region, this would mean that the Western Pacific region will have fewer cases of hepatitis B than the African region.
Explanation:
If the answers are:
A.
The Western Pacific region will have more cases of hepatitis B than the African region.
B.
The Western Pacific region will have fewer cases of hepatitis B than the African region.
C.
The Western Pacific and African regions will have same number of cases of hepatitis B.
D.
Nearly 90% of people will be immune to hepatitis B in both regions.
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Why do yeast not contain chlorophyll?
1. Yeast does not need to absorb sunlight to make energy.
2. Yeast can only survive in the dark.
3. Yeast does not need oxygen to make energy.
4. There is not enough space in the yeast to contain chlorophyll
Answers
How did the distribution of matter in the early universe affect how we are able to detect cosmic background
adiation today?
Theorists calculated that if the Big Bang happened about 14 billion years ago, the temperature of the universe
now would be about 3°C above absolute zero. How has the temperature of background radiation changed
between 14 billion years ago and present day?
On satellite maps that show where temperature is different from the average background temperatures,
become apparent and were caused by
Answers
The distribution of matter in the early universe affected the detection of cosmic background radiation today by creating inhomogeneities in the distribution of matter and energy. These inhomogeneities lead to the formation of galaxies and large-scale structures in the universe and average background temperature.
What was the cosmic temperature?The cosmic background radiation temperature was initially very high, but has cooled down as the universe expanded over time. About 380,000 years after the Big Bang, the temperature had cooled down to around 3000 K, which is still much higher than the current temperature of around 2.7 K. The temperature has continued to decrease over time due to the expansion of the universe, resulting in the current temperature of around 2.7 K.
Satellite maps of temperature differences from the average background temperature show anisotropies in the cosmic microwave background radiation, which are caused by the inhomogeneities in the distribution of matter and energy in the universe. These anisotropies provide important information about the early universe and its evolution into the present day.
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Which of the following is an example of a detritivore? a. Mushroom b. Bacteria c. Squirrel d. Buzzard e. Ladybug
Answers
Answer:
c. a squirrel
Explanation:
A detritivore is also called a decomposer and they derive the nutrients from the dead and decaying matter and release them into the environment.
The mushroom acts as a detritivore as it uses the nutrients from the old dead and decaying bark of tree and releases the same to the soil on getting destroyed. They altos help in the recycling of the nutrients back to the environment.Hence the option A is correct.
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how many blood smears are required for a differential white blood cell count?
Answers
In order to count differential white blood cells, only one blood smear is required.
What is a differential white blood cell count? A differential white blood cell count, also known as a "diff," measures the number of each type of white blood cell in your blood. A diff assists in determining if there is an infection or inflammatory condition in your body, as well as providing insight into other medical concerns.
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Select the correct answer.
Based on these descriptions, which man is impotent?
Jacob has a low sperm count.
Reuben has a blocked vas deferens.
Leon is unable to sustain an erection.
Troy’s testes have not descended into the scrotum.
A.
Jacob
B.
Reuben
C.
Leon
D.
Troy
I NEED IT ASAP
Answers
Answer:
c.leon
due to this he is unable to ejaculate in the woman during sex and can't get her pregnant....hope this helps