They made gun powder and wood block printing <span />
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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Mark brainliest
It is called the "s<span>elf-serving bias".</span>
The self-serving bias is
individuals' propensity to credit positive occasions to their own character yet
ascribe negative occasions to outer variables. It's a typical kind of
psychological predisposition that has been widely contemplated. At the point
when people dismiss the legitimacy of negative input, center around their
qualities and accomplishments however ignore their flaws and disappointments, they
are shielding their ego from danger and damage.
By about 2050, the <u>elderly</u> populations in <u>low income countries</u> are expected to boom.
It is expected that in the next thirty years, the world's population would increase by 2 billion persons, that is, become 9.7 billion instead of the present 7.7 billion.
The older population is increasing because of the increased life expectancy as well as the falling fertility levels. Several countries are experiencing a reduction in population size and their number keeps on increasing.
This change eventually has a major impact on the achievement of the Sustainable Development Goals or the SDGs, which are the globally agreed targets to achieve economic stability over years.
To learn more about population, click
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A primary source is a source that was created by a person who was there to witness it. So, the answer would be A, a document made by someone who actually saw an event. In other words, the document was written by someone who was there to witness the event.
