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Nutrition in Unicellular Organisms Class 10 Science In unicellular organisms, the entire surface consumes the food. Amoeba Amoeba is a single-celled organism that consumes food using transient finger-like protrusions of the cell that fuse over the food particle to form a food vacuole, where the food is then broken down and diffused into the cytoplasm. The unabsorbed food is transported to the cell surface where it is expelled. Paramecium Another unicellular organism, Paramecium, has a specific location in the body where it may ingest nourishment. The movement of cilia, a structure that resembles hair and is found in the body of a paramecium, transports food to the area. Nutrition in Amoeba: Amoeba has holozoic nutrition. Thus, solid food particles are ingested which react with enzymes and are digested. It is an omnivore. 1. The unicellular species known as the amoeba exhibits the Holozoic style of nourishment. Membrane from amoeba cells continues to protrude into pseudopodia. Amoeba f

How does nuclear Energy Affect the Environment? Nuclear energy has been proposed as a solution to the requirement for a sustainable energy source that does not produce CO2. Nuclear power is not a renewable energy source by definition. The environmental implications of nuclear energy raise important concerns that must be addressed, particularly before any further nuclear power facilities are built. Carbon Dioxide : Because nuclear power plants do not emit carbon dioxide, it has been dubbed a "clean" form of energy. While this is correct, it is also misleading. Although nuclear power plants do not emit carbon dioxide while in operation, large amounts of carbon dioxide are released during the construction and operation of the plants. Uranium is used as a fuel in nuclear power reactors. Uranium mining emits a significant amount of carbon dioxide into the atmosphere. When new nuclear power facilities are created, carbon dioxide is also emitted into the atmosphere. Finally, the tr

How many parts of the human brain and its functions? Class 10 Science The human brain has three major parts: (a) Fore-brain (b) Mid Brain (c) Hind Brain.   (a) Fore-brain (CEREBRUM) – The forebrain is the most specialized/complex part of the brain. Functions 1. Part of the brain that thinks 2. Maintain control over voluntary acts. 3. Memory storage — Save data. 4. HUNGER-ASSOCIATED CENTRE 5. Receives and integrates sensory inputs from numerous bodily parts (b) The Midbrain It links the hindbrain to the forebrain. It is the component of the central nervous system that regulates vision, arousal (alertness), motor control, sleep/wake, hearing, and temperature. (c) Cerebellum, Medulla, and Pons – Cerebellum, Medulla, and Pons Maintains Body movement is controlled by posture and body balance. Controls involuntary behaviours such as salivation, blood pressure, and vomiting. Respiratory regulation Know more Structure and Functions of the Human Brain Visit online tuition for CBSE Online Class

Differences between Biodegradable and Non-biodegradable - Class 10 Science The following are the main differences between biodegradable and non-biodegradable substances: Biodegradable compounds degrade naturally in the environment and are therefore considered environmentally beneficial. The degrading process involves air, water, bacteria, sunlight, soil, and other natural forces. Non-biodegradable pollutants pollute the environment and harm living beings because they do not decompose naturally. Biodegradable substances include dead plants and animals, their waste, fruits, vegetables, flowers, paper, and so on, whereas non-biodegradable substances include chemicals, paints, plastic, rubber, poisonous plastic, metals, and so on. Biodegradable substances decompose quickly, in a matter of days or months, whereas non-biodegradable commodities either do not break down or keep their uniqueness, or their disintegration is so slow that thousands of years are required. After decomposition, bi

Class 10 Science - Human Excretory System  The excretory system is a part of a live organism's body that disposes of waste. Organs of the human excretory system include: A couple of kidneys A ureter is a tube that connects the kidneys to the bladder. The bladder of the urinary system A urethra is a tube that connects the bladder to the urine A couple of kidneys Each person is born with two kidneys. On either side of the backbone are the kidneys, which are bean-shaped organs. The kidneys are protected by the ribs and back muscles. Each adult human kidney measures 10-12 cm in length, 5-7 cm in width, and weighs 120-170 grammes. Renal Capsule is a type of capsule that is used to treat kidney problems The fibrous tissue that surrounds the kidney is referred to as the renal capsule. The renal cortex and renal medulla are two zones on the interior of the kidney. The outer layer of the kidney is the renal cortex, while the inner layer is the renal medulla. Renal columns run between the m

Natural Gas, Advantages and Disadvantages What is Natural Gas? Natural gas is a fossil energy source  that is produced deep under the earth's surface and can be used for cooking, heating, and producing electricity. Natural gas is a nonrenewable fuel made up of a variety of compounds. It is colourless and odourless, with Methane making up the majority of it. Methane is made up of one carbon atom and four hydrogen atoms (CH4). When decomposed plants and animals are exposed to intense heat and pressure for several years beneath the earth's surface, natural gas is produced (about a million years). Natural gas also includes non-hydrocarbon gases including carbon dioxide and water vapour, as well as natural gas liquids (NGLs), which are also hydrocarbon gas liquids. Natural gas is a highly flammable energy source that is often used as a fuel and in the manufacture of materials and chemicals all over the world. What are the sources of Natural Gas? Natural gas is derived from the earth

What is the  Function of Meiosis? It’s  Stages  and Example of Meiosis What is Meiosis? Meiosis is a mechanism in which the number of chromosomes in a cell  is reduced before reproduction in eukaryotic, sex-breeding animals. Many species make gametes out of these cells, such as eggs and sperm. During reproduction, the gametes will mate and form a new zygote. Combining the two gametes would give the zygote the same number of alleles as the parent since the number of alleles decreases during meiosis. Each gene has two copies in diploid species. Meiosis is the process by which a cell divides twice to form four cells that contain half of the genetic information. These  cells  are our sex cells – sperm in men and eggs in women. Functions of meiosis? Many sexually reproducing species, like their parents, need meiosis to ensure that their offspring have an equal number of chromosomes. The two cells form a new pair during the fertilization process. The offspring would have four copies of each