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who discovered cell?

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, under Cell - Structure and Functions by Manish Sinha , added 6 years ago comment

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Everything had lined up for the New England Patriots to once again storm to a last-minute Super Bowl victory, but Brandon Graham, a standout defensive end for the Philadelphia Eagles, shot through the offensive line and his strip sack of Tom Brady ended the threat, handing the Eagles a shocking 41-33 upset in Super Bowl LII and the team’s first championship since 1960. wholesale baseball jersers Nick Foles, the backup quarterback who took over as Philadelphia’s starting quarterback only after an injury to Carson Wentz in Week 14, completed 28 of 43 passes for 373 yards and 3 touchdowns, and he even caught a touchdown pass in an offensive effort that few predicted he was capable of coming into the game. He repeatedly converted third down opportunities, threw aggressively into coverage all game, and appeared every bit as poised and confident as Brady, the five-time champion on the other side of the field. arizona diamondbacks jersers Three weeks ago the thought of Foles being named the most valuable player of Super Bowl LII would have seemed ludicrous, but after watching the Philadelphia Eagles’ quarterback crush the Minnesota Vikings in the N.F.C. championship game, and then essentially match that performance against the New England Patriots in the Super Bowl, the choice seemed obvious. texas rangers jersers “I felt calm,” he said before praising his teammates and coaching staff. colorado rockies jersers The Patriots battled defensive problems early in the season, but had seemed to figure things out down the stretch. On this day, however, they were unable to stop the Eagles from scoring at will, and they squandered an incredible effort in which Brady and Co. generated more than 600 yards of offense. milwaukee brewers jersers The Eagles had offensive stars all over the field, with LeGarrette Blount rushing for 90 yards and a touchdown, Corey Clement contributing 108 yards of total offense, and Nelson Agholor catching 9 passes for 84 yards. But it was Zach Ertz, Foles’s favorite target, who got the go-ahead touchdown in the fourth quarter when he dove over Devin McCourty for a thrilling 11-yard touchdown pass that stood up to a long review by the officials who were trying to determine if he had possession of the ball before it shot out of his hands in the end zone. Ertz finished the day with 7 catches for 67 yards. chicago cubs jersers Asked about the catch after the game, Ertz poked fun at Philadelphia’s rowdy fan base and how they would have reacted if the call had gone the other way. pittsburgh pirates jersers ”If they had overturned that I don’t know what would have happened to the city of Philadelphia,” he said with a smile. arizona diamondbacks jersers Philadelphia’s defense, which relied on superb play by its line all season, spent most of the game generating very little pass-rush, but when the game was on the line Graham burst through for the sack, and Derek Barnett recovered the ball for a turnover that essentially decided the game. blue mookie betts authentic jersers Do you want exclusive sports news, highlights and analysis from a rotating cast of New York Times journalists delivered to your inbox once a week? Click here to receive our weekly Sports newsletter. colorado rockies jersers On one final drive, Brady drove his team 40 yards, but it was too little too late, and he lost in a Super Bowl for just the third time in eight tries. cleveland indians jersers The effort put forth by Foles in the last two games will certainly raise questions as to his status for next season, as he is currently expected to go back to being a backup to Carson Wentz. While the Eagles will assuredly want to stick with Wentz, Foles may seek a trade so he can start somewhere else, though he said all week that he had no plans to demand such a move. cincinnati reds jersers
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0 for Q. who discovered cell? answer added by Kevinjhone 10 months, 1 week ago
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Thanks for posting really such interesting post. I would recommend your site to my friends. Bonkio
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0 for Q. who discovered cell? answer added by arianapham 1 month, 3 weeks ago
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Thanks for posting really such interesting post. I would recommend your site to my friends. Bonkio
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0 for Q. who discovered cell? answer added by arianapham 1 month, 3 weeks ago
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Thanks for all your information, Website is very nice and informative content cat mario
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0 for Q. who discovered cell? answer added by phamyen 3 weeks ago
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The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s. i also need to know who discoverd All Credit and Debit Card
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0 for Q. who discovered cell? answer added by KelvinNox 2 weeks ago
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The cell was first discovered by Robert Hooke in 1665 using a microscope. The first cell theory is credited to the work of Theodor Schwann and Matthias Jakob Schleiden in the 1830s. i also need to know who discoverd All Credit and Debit Card
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0 for Q. who discovered cell? answer added by KelvinNox 2 weeks ago
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Question: Define a cell? Answer: The cell is the basic structural,functional and biological unit of life of all living organisms.Cells are the smallest unit of life that can replicate independently,and are often called the “building blocks of life”.The study of cells is called cell biology. Question: Who discovered the cell? Answer:Cell was discovered by Robert Hooke in 1665.The cell theory, developed in 1839 by Mathias Jakob Schleiden and Theodor Schwann,states that all organisms are composed of one or more cells and all cells comefrom preexisting cells. Question: Give three examples of unicellular organisms. Answer: Three examples of unicellular organisms are : 1.Amoeba 2.Acetabularia 3.Protists Question:Why cells could not be observed before 17th century? Answer: Majority of the cells are too small in size.Cells could not be observed before 17th century because of their small size, also the lens of microscope were not electronic as of today. Question:Why cork could not be observed as such by Hooke? Answer: Cork could not observed as such by Hooke because it was a solid structure.He found that the cork was made of box-like compartments forming a honeycomb structure.He named these compartments as cells. Question: Where did Hooke demonstrate his observations on cork slice? Answer: Hooke observed thin slices of cork under his crube microscope.He demonstrated his work to scientist at Royal Society Of London. Question: Name the outermost layer of animal cell. Answer: Cell membrane is theoutermost layer of animal cell.It protects and provides shape to the cell.It also allows materials to enter and leave the cell through tiny holes. Question: Name the layer which is present outside the plasma membrane in plant cell? Answer: Cell wall is the layer which is present outside the plasma membrane in plantcell.It is made of a stuff,non living material called cellulose.Cell wall is lacking in animal cells. Question: Where are chromosonespresent in a cell? Answer:. Chromosomes are in a cell all the time. When a cell is not dividing, the chromosomes are in the nucleus of a cell that contain DNA, but they are sort of wound up in a tangle instead of matched up in pairs. Question: Name the cell part which has tiny holes? Answer: Cell membrane is the part which has tiny holes. Question: Name the cell organelles which are found in a plant cell? Answer: Organelles that are found only in plant cells are:1.Lysosomes 2.Mitochondria 3.Ribosomes 4.Rough and smoothendoplasmic reticulums 5.Chloroplasts 6.Golgi body or Golgi apparatus Question: Name the cell having branched structures? Answer: Nerve cell is the cell having branced structures. Question: Which cell can be observed under unaided eye? Answer: Oocyte and Parameciums can be observed under unaided eye. Question : Mention functions of following 1.Cell Membrane 2.Chromosones Answer: 1. Cell Membrane: The cell membrane, or plasma membrane, surrounds the cytoplasm of a cell. In animals, the plasma membrane is the outer boundary of the cell, while in plants and prokaryotes it is usually covered by acell wall. This membrane serves to separate and protect a cell from its surrounding environment and is made mostly from a double layer of phospholipids, which are amphiphilic (partly hydrophobic and partly hydrophilic). 2. Chromosones: Generally, chromosomes main function is to control the activities of a livingcell. They are vital for the cell division process and are responsible for the division, replication as well as creation of daughter cells, which contain accurate sequences of DNA and proteins. Question: Why are the following important to a plant cell? 1.Cell wall 2.Chloroplast 3.Mitochondria 4.Nucleus Answer:1.Cell wall: The cell wall acts to protect the cell mechanically andchemically from its environment, and is an additional layer of protection to the cell membrane. Different types of cell have cell walls made up of different materials; plant cell walls are primarily made up of pectin, fungi cell walls are made up of chitin and bacteria cell walls are made up of peptidoglycan. 2.Chroloplast: Their main role is to conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight, and stores it in the energy storage molecules ATP and NADPH while freeing oxygen from water. They then use the ATP and NADPH to make organic molecules from carbon dioxide in a process known as the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, much amino acid synthesis, and the immune response in plants. 3.Mitochondria: Mitochondria are important as they are involved in tasks such as signaling, cellular differentiation, cell death, as well as the control of the cellcycle and cell growth.[4] Mitochondria have been implicated in several human diseases, including mitochondrial disorders[5] and cardiac dysfunction,[6] and may play a role in the aging process. 4.Nucleus: The function of the nucleus is to maintain the integrity of genes and to control the activities of the cell by regulating gene expression — the nucleus is, therefore, the control center of the cell. Question: Draw an outline diagram of an animal cell.Label the different parts. Answer: Nerve cells as are usually long and thin because of the need to transmit information between various parts of the body. It is the key unit of the nervous unit and also helps in carrying impulses from the body.Question: Mention three differences between plant cell and animal cell. Answer: Plant cell - Animal cell 1.They are larger than animal cells in size. - 1.Animal cells are smaller than plant cells in size. 2.Plastids are present in plant cells - 2.Plastids are absent in animal cells. 3.Plant cells usually have angular shape. -3.Animal cells usually have irregular shape.Question: What features are possessed by plant cells and animalcells? Answer: The features possessed by plant and animal cells are: 1.Plasma membrane is present in both. 2.Nucleus is presentin both. 3.Mitochondria is present in both. 4.Endoplasmic reticulam,golgi complex,lysosomes and ribosomes are present inboth.Question: Why are nerve cells long?Why do these cells have projections? Answer: Nerve cells as are usually long and have projections because of the need to transmit information betweenvarious parts of the body. It is the key unit of the nervous unit and also helps in carrying impulses from the body.Question: Why is Mitochondria known as “powerhouse of the cell”? Answer: Mitochondria is known as “power house of the cell” because it is responsible for producing energy that is used by the cells on its cellular activities. This cell structure is often abundant in active cells like the muscle cells because these cells require large amount of energy for its daily activities. Question: Name four basic elements that constitute more than 90 percent of protoplasm? Answer: Protoplasm is composed of a mixture ofsmall molecules such as ions, amino acids, monosaccharides and water, and macromolecules such as nucleic acids, proteins, lipids and polysaccharides. Question: Write in brief about the variation in shape and size of cells? Answer: Cell size : Some plants and animals are visible to the naked eye.Most cells,however are visible only with a microscope with dimensionsbetween 1 and 100 micrometres. Cell shape: Cells are of diverse shapes.Some cells like those of Amoeba and White Blood Cells of our body continuously change their shapes.The shape of the cell is related to its function.For example, a nerve cell is long,thin and has thread like structures as it has to convey message to different parts of the body. Question:Name the different cell organelles and the functions of these organelles? Answer:The different organelles are: 1.Lysosomes 2.Mitochondria 3.Ribosomes 4.Rough and smooth endoplasmic reticulums 5.Chloroplasts 6.Golgi body or Golgi apparatus Functions 1.Lysosomes: Lysosomes contains digestive enzymes which are used to digest invading micro-organisms, break down toxins (mainly in the liver) and also break down unwanted or damaged cell organelles.Lysosomes function as the digestive system of the cell, serving both to degrade
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0 for Q. who discovered cell? answer added by Áásíf Bhát 2 years, 11 months ago
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Question: Define a cell? Answer: The cell is the basic structural,functional and biological unit of life of all living organisms.Cells are the smallest unit of life that can replicate independently,and are often called the “building blocks of life”.The study of cells is called cell biology. Question: Who discovered the cell? Answer:Cell was discovered by Robert Hooke in 1665.The cell theory, developed in 1839 by Mathias Jakob Schleiden and Theodor Schwann,states that all organisms are composed of one or more cells and all cells comefrom preexisting cells. Question: Give three examples of unicellular organisms. Answer: Three examples of unicellular organisms are : 1.Amoeba 2.Acetabularia 3.Protists Question:Why cells could not be observed before 17th century? Answer: Majority of the cells are too small in size.Cells could not be observed before 17th century because of their small size, also the lens of microscope were not electronic as of today. Question:Why cork could not be observed as such by Hooke? Answer: Cork could not observed as such by Hooke because it was a solid structure.He found that the cork was made of box-like compartments forming a honeycomb structure.He named these compartments as cells. Question: Where did Hooke demonstrate his observations on cork slice? Answer: Hooke observed thin slices of cork under his crube microscope.He demonstrated his work to scientist at Royal Society Of London. Question: Name the outermost layer of animal cell. Answer: Cell membrane is theoutermost layer of animal cell.It protects and provides shape to the cell.It also allows materials to enter and leave the cell through tiny holes. Question: Name the layer which is present outside the plasma membrane in plant cell? Answer: Cell wall is the layer which is present outside the plasma membrane in plantcell.It is made of a stuff,non living material called cellulose.Cell wall is lacking in animal cells. Question: Where are chromosonespresent in a cell? Answer:. Chromosomes are in a cell all the time. When a cell is not dividing, the chromosomes are in the nucleus of a cell that contain DNA, but they are sort of wound up in a tangle instead of matched up in pairs. Question: Name the cell part which has tiny holes? Answer: Cell membrane is the part which has tiny holes. Question: Name the cell organelles which are found in a plant cell? Answer: Organelles that are found only in plant cells are:1.Lysosomes 2.Mitochondria 3.Ribosomes 4.Rough and smoothendoplasmic reticulums 5.Chloroplasts 6.Golgi body or Golgi apparatus Question: Name the cell having branched structures? Answer: Nerve cell is the cell having branced structures. Question: Which cell can be observed under unaided eye? Answer: Oocyte and Parameciums can be observed under unaided eye. Question : Mention functions of following 1.Cell Membrane 2.Chromosones Answer: 1. Cell Membrane: The cell membrane, or plasma membrane, surrounds the cytoplasm of a cell. In animals, the plasma membrane is the outer boundary of the cell, while in plants and prokaryotes it is usually covered by acell wall. This membrane serves to separate and protect a cell from its surrounding environment and is made mostly from a double layer of phospholipids, which are amphiphilic (partly hydrophobic and partly hydrophilic). 2. Chromosones: Generally, chromosomes main function is to control the activities of a livingcell. They are vital for the cell division process and are responsible for the division, replication as well as creation of daughter cells, which contain accurate sequences of DNA and proteins. Question: Why are the following important to a plant cell? 1.Cell wall 2.Chloroplast 3.Mitochondria 4.Nucleus Answer:1.Cell wall: The cell wall acts to protect the cell mechanically andchemically from its environment, and is an additional layer of protection to the cell membrane. Different types of cell have cell walls made up of different materials; plant cell walls are primarily made up of pectin, fungi cell walls are made up of chitin and bacteria cell walls are made up of peptidoglycan. 2.Chroloplast: Their main role is to conduct photosynthesis, where the photosynthetic pigment chlorophyll captures the energy from sunlight, and stores it in the energy storage molecules ATP and NADPH while freeing oxygen from water. They then use the ATP and NADPH to make organic molecules from carbon dioxide in a process known as the Calvin cycle. Chloroplasts carry out a number of other functions, including fatty acid synthesis, much amino acid synthesis, and the immune response in plants. 3.Mitochondria: Mitochondria are important as they are involved in tasks such as signaling, cellular differentiation, cell death, as well as the control of the cellcycle and cell growth.[4] Mitochondria have been implicated in several human diseases, including mitochondrial disorders[5] and cardiac dysfunction,[6] and may play a role in the aging process. 4.Nucleus: The function of the nucleus is to maintain the integrity of genes and to control the activities of the cell by regulating gene expression — the nucleus is, therefore, the control center of the cell. Question: Draw an outline diagram of an animal cell.Label the different parts. Answer: Nerve cells as are usually long and thin because of the need to transmit information between various parts of the body. It is the key unit of the nervous unit and also helps in carrying impulses from the body.Question: Mention three differences between plant cell and animal cell. Answer: Plant cell - Animal cell 1.They are larger than animal cells in size. - 1.Animal cells are smaller than plant cells in size. 2.Plastids are present in plant cells - 2.Plastids are absent in animal cells. 3.Plant cells usually have angular shape. -3.Animal cells usually have irregular shape.Question: What features are possessed by plant cells and animalcells? Answer: The features possessed by plant and animal cells are: 1.Plasma membrane is present in both. 2.Nucleus is presentin both. 3.Mitochondria is present in both. 4.Endoplasmic reticulam,golgi complex,lysosomes and ribosomes are present inboth.Question: Why are nerve cells long?Why do these cells have projections? Answer: Nerve cells as are usually long and have projections because of the need to transmit information betweenvarious parts of the body. It is the key unit of the nervous unit and also helps in carrying impulses from the body.Question: Why is Mitochondria known as “powerhouse of the cell”? Answer: Mitochondria is known as “power house of the cell” because it is responsible for producing energy that is used by the cells on its cellular activities. This cell structure is often abundant in active cells like the muscle cells because these cells require large amount of energy for its daily activities. Question: Name four basic elements that constitute more than 90 percent of protoplasm? Answer: Protoplasm is composed of a mixture ofsmall molecules such as ions, amino acids, monosaccharides and water, and macromolecules such as nucleic acids, proteins, lipids and polysaccharides. Question: Write in brief about the variation in shape and size of cells? Answer: Cell size : Some plants and animals are visible to the naked eye.Most cells,however are visible only with a microscope with dimensionsbetween 1 and 100 micrometres. Cell shape: Cells are of diverse shapes.Some cells like those of Amoeba and White Blood Cells of our body continuously change their shapes.The shape of the cell is related to its function.For example, a nerve cell is long,thin and has thread like structures as it has to convey message to different parts of the body. Question:Name the different cell organelles and the functions of these organelles? Answer:The different organelles are: 1.Lysosomes 2.Mitochondria 3.Ribosomes 4.Rough and smooth endoplasmic reticulums 5.Chloroplasts 6.Golgi body or Golgi apparatus Functions 1.Lysosomes: Lysosomes contains digestive enzymes which are used to digest invading micro-organisms, break down toxins (mainly in the liver) and also break down unwanted or damaged cell organelles.Lysosomes function as the digestive system of the cell, serving both to degrade
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0 for Q. who discovered cell? answer added by Áásíf Bhát 2 years, 11 months ago
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It was Robert Hooke, who discovered cells in 1665. While studying a very thin slice of cork under his self made microscope, he actually saw cell walls or dead cells but not the complete cell.

He saw a number of tiny pores which he remarked that they looked like the walled compartments the monks used to live in. Cella means hollow space. Because of this association, Hooke called them cells and the name still continues.

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0 for Q. who discovered cell? answer added by shrirajna 6 years ago
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