In ecology, a community is a group or association of populations of two or more different species occupying the same geographical area at the same time, also known as a biocoenosis. The term community has a variety of uses
<h2>Answer:</h2>
Option B is correct.
B. start a chemical reaction
<h2>
Explanation:</h2>
Activation energy is the amount of energy that is needed to start a chemical reaction. To start a chemical reaction we have to provide this amount of energy. Different type of catalyst are used to lower the activation energy and catalyze the reaction.
The Big Bang Theory. <span>The </span>Big Bang<span> explains how the universe expanded from a single point. The </span>Big Bang <span>occurred 13.7 billion years ago. All the matter, energy, and light; were all compacted into an infinitely dense point. The universe then expanded tremendously.</span>
I believe the answer is photosynthesis
The correct answer to this is:
“the ependymal cells”
Glial cells are cells that sustain
and protect the neurons in the peripheral and central nervous system. They estimate
to take up about half the volume of the nervous system. One of the glial cells
is the ependymal cells. They create a
simple cuboidal to columnar epithelium which is known as ependyma.