Answers
[tex]\huge\textbf{Cell Theory}[/tex]
the Cell Theory was give by German scientists, Schleiden and T.Shwan in 1839. It stated that,
All organism are composed of one or more cellsThe cell is the structural and functional unit of life It is a de novo structure, that means it COULD arise from non living thing which was incorrect.It was corrected by the German pathologist Rudolf Virchow in 1855. He made a convincing case, corrected and added the third point of the cell theory. It is,
Cells can arise only by a division of pre-existing cell. It is NOT a de novo structure.Cell theory brought a great evolution in the field of biology which established the function of organism is the result of activities and interaction of the cell units.
_____________________________________[tex]\huge\textbf{Question:}[/tex]
Flask 1: It is observed that there are no micro-organism, this is because the meat is sealed and no micro-organism could enter through it.Flask 2: It is observed that there are micro-organism present because meat is not sealed but open.Flask 3: As the S tube is used, the micro-organism are not able to reach the meat because of the curvy pathThese observations support the point that cells could arise only by a division of pre-existing alive cells because in Flask 1 when there were no micro-organism present so there was no organisms found so no micro-organism arised, In flask 3 the S tube was used so no micro-organism could reach the meat thus there were no organism there which could divide to reproduce. The flask 2 was open, so the micro organisms reached the meat so they divided which means Cells can only arise by a division of pre-existing cells.
_____________________________________Best Regards,'Borz'All these experiments explain that cells only form from preexisting cells, as microbes give rise to the synthesis of new organisms, and this explains the cell theory through all these experiments.
What is cell theory?Cell theory is a fundamental concept in biology that describes the basic unit of life and its properties, and here in flask 1, if the meat is properly sealed and handled in a sterile environment, it is possible that no microorganisms could enter through it and explain that no growth is seen as no microbes are present. In flask 2, as the meat is open and exposed, it is more likely that microorganisms could be present and potentially grow. Microorganisms are ubiquitous in the environment and can be found in soil, water, air, and on surfaces such as countertops, utensils, and cutting boards. The use of an S tube could potentially reduce the amount of microorganisms that reach the meat due to the curvy path that is present in flask 3.
Hence, all these experiments explain that cells only form from preexisting cells, as microbes give rise to the synthesis of new organisms.
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Related Questions
Which of the following waste products of mining poses the greatest health risk?
1.radionuclides
2.dust
3.carbon
4.metal
Answers
Answer:
1
Explanation:
Radionuclides are waste products of mining poses the greatest health risk.Thus ,option 1 is correct.
What is radionuclide?
A radionuclide or is a nuclide that has excess energy to make it unstable.
The extra energy can be utilised in three ways:
Discharge from the nucleus as gamma radiation.Transferred to one of its electrons to release it as a conversion electron Used to create and discharge new particle from the nucleus.Several health issues are arise due to radionuclide.
Cancer is the major disease caused due to radionuclide that affects a large number population.
Radionuclide plays a vital role in increasing the mortality rate.
Therefore, radionuclides is the waste products of mining poses the greatest health risk.Thus option 1 is correct .
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What kind of tools did Neanderthals use in their daily lives?
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Answer:
they made bone tipped wooden spears Nd hafted cutting or scraping tools and they made various things for adhesive.
Main idea or the topic of finding the epicenter of an earthquake.
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Answer:
Main Concept Seismology is the study of earthquakes, their effects, and seismic waves.
Explanation:
The earthquake epicenter is a point on the Earth's surface directly above an earthquake. Scientists determine the epicenter by studying the P waves and S waves produced by all earthquakes. P waves are compression waves and travel faster through the Earth than S waves.
HELP ASAP PLEASE!! DUE IN 10 MINUTES !!! based on these results which statement correctly predicts what will happen to red blood cells when they are placed in a beaker containing a water solution in which the salt concentration is much higher than the salt concentration in the red blood cells
A:the red blood cells will absorb water and increase in size
B:the red blood cells will lose water and decrease in size
C:red blood cells will of first absorb water than lose water and maintain their normal size
D:the red blood cells will first lose water then absorb water and finally double in size
Answers
Answer:
The correct answer is - option B. the red blood cells will lose water and decrease in size.
Explanation:
The movement of the water takes place always from the high concentration region of solute to the low concentration of solute through a semi-permeable membrane. In this case, the representation is showing that placing the cell inside a solution with low concentration solute than the cell makes the cell increase the size, and placing it in a solution high concentration of solute makes it decrease in size due to the transfer of water from more water to the low water area.
Now placing the RBC in a solution with more salt concentration than the cell makes the solution hypertonic which means the solution has more solute concentration and less water so the water move from cell to the solution and cell will shrink and decrease in size.
Feedback interactions in the human body are important
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Answer: wdym uh they keep the internal body environment within its normal range.
Explanation:
Help please I will give Brainly
Answers
Answer:
(C)the option is already correct
What factor determines the pathway that pyruvic acid takes after leaving glycolysis?
Answers
Answer:
Explanation:
Answer Expert Verified. The presence of oxygen and levels of ATP.
Electrons that provide the energy for the production of most of a cell's ATP are carried to the electron transport cham by molecules.
Answers
Answer:
The answer was not found :(
Explanation:
Merry Christmas and Happy Holidays!
Answer: The electron transport chain takes place in the mitochondria. This stage converts the NADH into ATP. The electron transport chain works as a proton pump: it pumps hydrogen ions (protons) through the membrane, and only allows them back through a protein (ATP synthase) which makes ATP.
Hope this helps......... Stay safe and have a Merry Christmas!!!!!!!
I just want to say something... My account got deleted yesterday and i'm very upset because i had over 600 friends, 7,00 points, and 38 brainiest answer... I would love it if i got at least 15-20 friends by Christmas.
A kitten might have genes for poor vision, but it could learn to...
Answers
Answer:
improve its eye power
Explanation:
I really dont know, but I think its correct
Please hurry! Will vote brainliest!!
Leonardo is explaining the ecological pyramids to his daughter. He tells her that often scientists do not favor pyramid of biomass. Why would he say that?
A. because the available biomass may be less than the actual energy provided
B. because calculating biomass involves counting of the organisms, which can be erroneous
C. because obtaining biomass requires advanced technology
D. because biomass shows that the energy remains constant across all trophic levels
Answers
La respuesta es la D
Answer:
D. because biomass shows that the energy remains constant across all trophic levels
What is the melting point of a substance
Answers
depending on what it is for water it is 32°F
steel is 2500°F
aluminum 1,221°F
zinc is 787.2°F
sorry i cant put all the melting points
unless u mean
Melting point, temperature at which the solid and liquid forms of a pure substance can exist in equilibrium. As heat is applied to a solid, its temperature will increase until the melting point is reached. More heat then will convert the solid into a liquid with no temperature change.
Requires the use of energy to molecules.
Diffusion
Osmosis
Active transport
Answers
Do you think tress could reduce the negative effects of climate change? why or why not
Answers
Answer:
Hi there, Here is what I think
Trees can't reduce the negative effects of climate change because climate change throws off their functions (ex. Trees' leaves fall during the fall season but if its a lot warmer close to summer weather during fall season) it can mess up the way they function at a certain point in the seasons with that trees won't be able to function properly if the weather changes all of a sudden from scorching hot summer to a blizzard all of a sudden which can kill trees. Trees can hibernate in the Winter and bloom around Spring/Summer time but if you have wintery weather during summer it will kill them. So no trees can't reduce the negative effects of climate changes hence why people are scared over climate change because if the trees die we can die too without the oxygen trees and other plants provide for us.
Hope this helped :)
Yeasts are unicellular microorganisms of the fungi kingdom that can digest sugars using both aerobic and anaerobic cellular respiration. In the below experiment, what by-product of this reaction causes the balloons to expand?
Answers
Answer:
This question is incomplete as it does not contain the representation of the experiment, however, based on general understanding, the answer is:
Carbon dioxide (CO2)
Explanation:
Yeasts, as stated in this question, are living unicellular organisms that belong to the KINGDOM FUNGI. They employ both the aerobic (with oxygen) and anaerobic respiration (without oxygen) in breaking down sugars. However, both methods of cellular respiration gives off CARBON DIOXIDE (CO2) as a byproduct.
Therefore, when a yeast is placed in a balloon in accordance to this experiment and is allowed to perform respiration either aerobically or anaerobically, it gives off CO2 gas, which causes the balloon to expand.
A lesion in the
is likely to affect thinking, planning, and overall personality,
as this brain region plays a significant role in cognition.
A) reticular activating syštem
B) prefrontal cortex
C) olfactory bulb
D) premotor cortex
Answers
what is an enzyme i will mark brainiest
Answers
Answer:
a substance produced by a living organism which acts as a catalyst to bring about a specific biochemical reaction.
Answer:
Enzymes are proteins that act as biological catalysts. Catalysts accelerate chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products.
Explanation:
Hope this helps, Brain-List?
A researcher has used in vitro mutagenesis to mutate a cloned gene and then has reinserted the mutated gene into a cell. To have the mutated sequence disable the function of the gene, what must then occur
Answers
Answer:
recombination resulting in replacement of the wild type with the mutated gene
Explanation:
Recombination is a process of the formation of new alleles when the original ones are broken down into bits and then ‘recombined’.
When mutation of a cloned gene occurs and the mutated gene is reinserted into a cell, the mutated sequence gene function will have to be disabled which involves recombination resulting in replacement of the wild type with the mutated gene.
HELP ASAP!!
What factor most influences whether a resource is classified as renewable or
nonrenewable?
A. The consumption rate of the resource
B. The availability of the resource
C. The length of time the resource takes to form
D. Whether the resource is biotic or abiotic
Answers
Answer:
C
Explanation:
goodluck yall
please help asap i have a time limit and if you give a correct answer i’ll give that brain thing tysm
Answers
Answer:
b.synthetic;oil
Explanation:
oil makes plastic
Guard cells regulate which characteristic of life?
A
Every living organism is made of cells.
B
All living things are composed of DNA.
C
All living things grow.
D
All living organisms strive for balance through homeostasis.
Answers
Answer:
a
Explanation:
it helps celluar function
How does carbon not get lost when it moves through the carbon cycle
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Answer:
Carbon is the chemical backbone of life on Earth. Carbon compounds regulate the Earth’s temperature, make up the food that sustains us, and provide energy that fuels our global economy. Carbon moves from one storage reservoir to another through a variety of mechanisms. For example, in the food chain, plants move carbon from the atmosphere into the biosphere through photosynthesis. They use energy from the sun to chemically combine carbon dioxide with hydrogen and oxygen from water to create sugar molecules. Animals that eat plants digest the sugar molecules to get energy for their bodies. Respiration, excretion, and decomposition release the carbon back into the atmosphere or soil, continuing the cycle. The ocean plays a critical role in carbon storage, as it holds about 50 times more carbon than the atmosphere. Two-way carbon exchange can occur quickly between the ocean’s surface waters and the atmosphere, but carbon may be stored for centuries at the deepest ocean depths. Rocks like limestone and fossil fuels like coal and oil are storage reservoirs that contain carbon from plants and animals that lived millions of years ago. When these organisms died, slow geologic processes trapped their carbon and transformed it into these natural resources. Processes such as erosion release this carbon back into the atmosphere very slowly, while volcanic activity can release it very quickly. Burning fossil fuels in cars or power plants is another way this carbon can be released into the atmospheric reservoir quickly.Human activities have a tremendous impact on the carbon cycle. Burning fossil fuels, changing land use, and using limestone to make concrete all transfer significant quantities of carbon into the atmosphere. As a result, the amount of carbon dioxide in the atmosphere is rapidly rising; it is already considerably greater than at any time in the last 800,000 years. The ocean absorbs much of the carbon dioxide that is released from burning fossil fuels. This extra carbon dioxide is lowering the ocean’s pH, through a process called ocean acidification. Ocean acidification interferes with the ability of marine organisms (including corals, Dungeness crabs, and snails) to build their shells and skeletons.
Why are proteins important to the survival of animals?
A.Proteins provide energy storage for cells.
B. Proteins provide genetic information to cells.
C. Proteins provide structural functions for the body.
D. Proteins provide the body with energy.
Answers
Answer:
C. proteins provide structural functions for the body.
Explanation:
Proteins play a key role in the healthy of animals such as building and repairing muscles and other body tissues of the animal, it is needed to form new skin cells, grow hair, build muscle tissue etc.
HELP ASAP
Which of the following choices represents the approximate percentage of geologic time that humans have existed on Earth since its origin?
less than 1%
1.8%
11.8%
more than 25%
Answers
Answer:
less than 1%
Explanation:
The approximate percentage of the geologic time that humans have existed on the Earth since its origin is less than 1%.
The earth is about 4.6 billion years and much of its history has been without the present of human activities.
Hominis were the first human to appear on the surface of the earth. This was in the Miocene epoch which was about 6 million years ago. Compared to the age of the earth, this time lapse is very small and not up to 1%. Life first appeared on earth about 3.5billion years. Since then evolution has taken its due course to give what we have today.What does the process of natural selection involve?What does the process of natural selection involve?
A.
preservation of disadvantageous genetic mutations
B.
preservation of advantageous genetic mutations
C.
preservation of all species
D.
preservation of all members of a species
Answers
Answer:
B. preservation of advantageous genetic mutations
Explanation:
The process of natural selection involves the preservation of advantageous genetic mutation in a given population.
Natural selection is one of the key factors that ensures the evolution of organisms.
Desired traits that are able to survive adverse conditions like disease, food shortage, natural disasters are favored by the process of natural selection. Traits that also undergo advantageous genetic mutation in order to get a competitive advantage is also accrued to natural selection.what is the realignment of minerals are called?
Answers
Answer: the realignment of minerals is called METAMPORPHISM
in rocks
Explanation: hope this helps if u need more explanation comment in the comment section
I'll cashapp you 10$
Answers
Answer:
The carpal region is distal to the brachial region.
Explanation:
IN WHAT SITUATIONS WOULD YOU WANT TO CONSUME FAT INSTEAD OF CARBOHYDRATES FOR ENERGY PURPOSES?
I have asked this 2 times and I keep getting people saying stuff that is not good and someone just said points so please will someone help me? this is my last time asking I really need help.
Answers
Answer:
if you're going to be doing something in the cold for an extended period of time, it would be better to eat more fat in order to keep you warm and energized.
What are the next four numbers in the pattern below ? 3,9,7,13,11,17,15,
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Answer:
21,19,25,23
Explanation:
You are adding 6 to get the next number, than subtract 2 from the the number
almost all energy comes from?
Answers
Answer: the sun
Explanation:
What is the product of light dependent reaction? *
A.Sugars
B.Light
C.Oxygen
D.Carbon Dioxide