write the difference between unicellular and multicellular organisms.
Answers
Answer:
Character Unicellular Organisms Multicellular Organisms
Cell A unicellular organism contains a single cell. A multicellular organism contains multiple cells.
Shape It is irregular in shape. The shape is well-defined.
Size It is small in size. It is comparatively large in size.
Nature Unicellular organisms are Microscopic. Multicellular organisms is Macroscopic.
Cell type It includes organisms having both prokaryotic and eukaryotic cell types. It includes organisms comprising only eukaryotic cell types.
Cell organization The cell organization is simple. The cell organization is complex.
Cell differentiation Generally absent, but unicellular yeasts may undergo differentiation Specialized cell differentiation occurs
Life span The life span is short. The life span is longer.
Evolution The oldest life forms evolved 3.8-4 billion years ago These evolved from the prokaryotes
Operational efficiency Operational efficiency is low. Operational efficiency is high.
Reproduction Reproduction occurs via budding and binary fission. Reproduction occurs via gamete fusion.
Regeneration ability Unicellular organisms show a greater tendency to regenerate. Multicellular organism shows low regeneration ability.
Examples Bacteria, Protozoans, Unicellular amoeba, etc. Humans, Animals, Plants, etc.
Both unicellular and multicellular organisms are the two major categories of the cell-type, depending on the numbers, shape, and size of cells.
Explanation:
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Explanation:
Unicellular organisms include bacteria, protists, and yeast. For example, a paramecium is a slipper-shaped, unicellular organism found in pond water. It takes in food from the water and digests it in organelles known as food vacuoles. Nutrients from the food travel through the cytoplasm to the surrounding organelles, helping to keep the cell, and thus the organism, functioning.
Multicellular organisms are composed of more than one cell, with groups of cells differentiating to take on specialized functions. In humans, cells differentiate early in development to become nerve cells, skin cells, muscle cells, blood cells, and other types of cells. One can easily observe the differences in these cells under a microscope. Their structure is related to their function, meaning each type of cell takes on a particular form in order to best serve its purpose. Nerve cells have appendages called dendrites and axons that connect with other nerve cells to move muscles, send signals to glands, or register sensory stimuli. Outer skin cells form flattened stacks that protect the body from the environment. Muscle cells are slender fibers that bundle together for muscle contraction.