Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.
Sir Isaac Newton, held the theory that light<span> was </span>made<span> up of tiny particles. In 1678, </span>Dutch<span> physicist, </span>Christiaan Huygens<span>, believed that </span>light<span> was </span>made<span> up of waves vibrating up and down perpendicular to the direction of the </span>light<span> travels, and therefore formulated a way of visualizing wave propagation.</span>
The central nervous system is made up of the brain and spinal cord.
The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.
The nervous system comprises the central nervous system, consisting of the brain and spinal cord, and the peripheral nervous system, consisting of the cranial, spinal, and peripheral nerves, together with their motor and sensory endings.
The model of the structures of the cell and and their functions is given in the image attached.
<h3>What are the cell structure and their functions?</h3>
Some explanation on structure of cells is given below:
The nucleus:
This is known to be the key or major organelle that tends to sustain or hold the genetic information that is needed for reproduction and cell growth as well as development.
Note that all cell is known to be made up of one nucleus and also a kind of membrane-bound organelles that can be seen in the cytoplasm.
Mitochondria:
This is known to be a double membrane-bound organelle that is known to function by acting as the site for the energy transactions and it is made for the survival of all cell.
Therefore, The model of the structures of the cell and and their functions is given in the image attached.
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Answer:
hi, this is the answer of your question
the cells that line your stomach can renew as fast as every two days, because they in contact with digestive acid.
