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The answer is B evolution:))
Answer:
Unicellular organisms are made up of only one cell that carries out all of the functions needed by the organism, while multicellular organisms use many different cells to function. Unicellular organisms include bacteria, protists, and yeast.
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.
Explanation:
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The Stone Age marks a period of prehistory in which humans used primitive stone tools. Lasting roughly 2.5 million years, the Stone Age ended around 5,000 years ago when humans in the Near East began working with metal and making tools and weapons from bronze. Paleolithic Period, also spelled Palaeolithic Period, also called Old Stone Age, ancient cultural stage, or level, of human development, characterized by the use of rudimentary chipped stone tools. The Mesolithic is the Old World archaeological period between the Upper Paleolithic and the Neolithic. The term Epipaleolithic is often used synonymously, especially for outside northern Europe, and for the corresponding period in the Levant and Caucasus. Neolithic, also called New Stone Age, final stage of cultural evolution or technological development among prehistoric humans. ... The Neolithic followed the Paleolithic Period, or age of chipped-stone tools, and preceded the Bronze Age, or early period of metal tools. Hominids are the group of primates that includes humans, gorillas, and chimpanzees, among others. The word hominid originally referred only to humans, and its Latin root reflects that: homo, or "man." Today scientists use it to talk about any of the great apes (including humans).
<span>It is moderated by emotional cues. If someone is doubting themselves, they create a self-fulfilling prophecy and are more unlikely to do a bad job. Also, their productivity is affected, because they spend more time doubting themselves. However, if they are feeling pride or enthusiasm, they will work more quickly and be more confident.</span>
