Cells

A:

The main difference between plant cells and animals cells is that plant cells possess a cell wall and animal cells do not. Animal cells have an irregular shape, and plant cells have a fixed, rectangular shape.

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  • Why is the nucleus called the control center of the cell?

    Q: Why is the nucleus called the control center of the cell?

    A: The nucleus can be thought of as the control center of a eukaryotic cell because it contains most of the genetic material that carries the instructions for the cell's operations. Inside the nucleus, DNA directs the sequence of chemical steps needed for the synthesis of proteins and, by way of the proteins' action, it controls the metabolism of the rest of the cell.
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  • What is the function of the dermis layer of cells?

    Q: What is the function of the dermis layer of cells?

    A: The dermis layer of skin is beneath the epidermis, and its main function is temperature regulation and blood supply. The dermis also gives skin its thickness, and it makes up roughly 90 percent of the thickness of skin.
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  • Why is cellular respiration important?

    Q: Why is cellular respiration important?

    A: Faculty resources from Thomas Nelson Community College explain that cellular respiration is the process by which cells produce adenosine triphosphate, or ATP. ATP is the molecule that carries energy for the cells of an organism, and it functions as a “currency” for the cells in an organism. Cells cannot store ATP; instead, they must produce it continuously or the organism will die.
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  • What type of cells undergo meiosis?

    Q: What type of cells undergo meiosis?

    A: Germ cells, which are diploid, undergo meiosis to produce haploid gametes. A gamete is a cell that fuses with another to form a zygote, which develops into an embryo. Female gametes are called eggs, while male gametes are known as sperm.
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  • What is the largest cell in the world?

    Q: What is the largest cell in the world?

    A: The largest cell in the world is an ostrich’s egg. Sometimes weighing over 3 pounds, the ostrich’s egg is composed of a single cell, as all other animal eggs are.
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  • What are examples of single-celled organisms?

    Q: What are examples of single-celled organisms?

    A: Examples of single-celled organisms include species in the Kingdom Protista, the Kingdom Monera and a few representatives of the Kingdom Fungi. Monera includes both conventional bacteria, called eubacteria, and a very strange group of organisms known as archeobacteria.
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  • What is the function of the cheek cell?

    Q: What is the function of the cheek cell?

    A: A cheek cell, an epithelial cell found in the tissue on the inside lining of the mouth, continually secretes mucus to maintains a moist environment in the mouth. Together with salivary glands that secrete saliva, the cheek cells supply enough moisture in the mouth for enzymes to thrive. This moisture softens food, assists in swallowing and starts digestion.
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  • What are the differences between plant cells and animal cells?

    Q: What are the differences between plant cells and animal cells?

    A: The main difference between plant cells and animals cells is that plant cells possess a cell wall and animal cells do not. Animal cells have an irregular shape, and plant cells have a fixed, rectangular shape.
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  • What is the definition of a plant cell?

    Q: What is the definition of a plant cell?

    A: A plant cell is the structural and functional unit of a plant. Plant cells generally form several different colonies in order to become a higher functioning organism.
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  • What are the longest cells in the human body?

    Q: What are the longest cells in the human body?

    A: The longest cells in the human body are neurons. Neurons are cells within the nervous system and carry messages throughout the body.
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  • What is the control center of a cell?

    Q: What is the control center of a cell?

    A: The nucleus is the control center of a cell. The nucleus controls the cell's growth and reproduction and contains the cell's DNA.
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  • Why are cells so small?

    Q: Why are cells so small?

    A: Brooklyn College explains that cells are small because they must have a large surface area relative to the amount of volume they contain to function properly. As a sphere grows larger, its volume increases much more rapidly than its surface area does. This presents logistical problems for the cell, as it tries to transport resources and products through a large volume without the resources available via a large surface.
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  • What is a good analogy for the functioning of the nucleolus?

    Q: What is a good analogy for the functioning of the nucleolus?

    A: The best analogy for the nucleolus in eukaryotic cells is a factory that makes tools that are used to build other resources. The primary function of the nucleolus is to combine and construct ribosomes. The primary function of ribosomes is to build proteins necessary for the cell.
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  • What is biofilm?

    Q: What is biofilm?

    A: Biofilm is a group of microorganisms that are joined together on a surface. They adhere to each other with molecular strands called extracellular polymeric substances, or EPS.
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  • What is the function of cytoplasm?

    Q: What is the function of cytoplasm?

    A: Cytoplasm has many functions in both prokaryotic and eukaryotic cells, including aiding in the movement of cellular materials and transporting the genetic material and products of cellular respiration. It also acts as a liquid medium to suspend organelles and helps cells expand during reproduction.
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  • What are some of the main functions of skin cells?

    Q: What are some of the main functions of skin cells?

    A: Some of the main functions of skin cells are to provide protection, perceive and transmit sensation, control evaporation and regulate temperature. Skin cells, which are epithelial cells, are also self-repairing and reproduce quickly. Epithelial cells are the most commonly found of the four tissue types.
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  • What is the function of collar cells in sponges?

    Q: What is the function of collar cells in sponges?

    A: Collar cells beat their flagella back and forth to force water through the sponge. Collar cells also pick up tiny bits of food brought in with water.
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  • Why do cells divide?

    Q: Why do cells divide?

    A: Cells divide as a way of reproducing or growing or to create sex cells. Cells can only reach a certain size due to a lack of balanced growth between their parts, so they have to divide once they reach a certain point. Sex cells, such as eggs and sperm, are only created through specialized cell division.
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  • What are the differences between plant and animal cells?

    Q: What are the differences between plant and animal cells?

    A: There are many differences between plant and animal cells, but one of the most obvious differences is that plant cells have a cell wall. Animal cells do not have a cell wall.
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  • What organelle produces ATP?

    Q: What organelle produces ATP?

    A: The mitochondria inside a cell produces ATP, or adenosine triphosphate. Cellular respiration is responsible for ATP production, a process in which ATP production occurs after biochemical energy from nutrients is converted.
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  • Where does meiosis take place?

    Q: Where does meiosis take place?

    A: For humans, meiosis occurs in the reproductive organs of both males and females. Both genders make use of meiosis to produce their respective gametes.
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