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Answer:</h2>
<u>Atom</u> is the primary as well as smallest unit of element.
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Explanation:</h2>
Atoms are the tiny blocks that build elements. They are composed of proton, electron, and neutron. The electron is negatively charged, protons are positively charged, and neutrons are devoid of any charge.
The atom present in the elements combine with one another and leads to the formation of molecules. The property of the atom remains unchanged even after involved in formation of new molecules. When two atoms combine together it is called as molecules.
Answer:
Explanation:
he region of the earth's atmosphere above the stratosphere and below the thermosphere, between about 30 and 50 miles (50 and 80 km) in altitude.
bassically one layer of the atmospere
Answer:
Theoretically, competition can initiate divergence in habitat use between individuals of a species, leading to restricted gene flow and eventual speciation. Evidence that sister species differ in habitat use is commonplace and consistent with this mechanism, but empirical experimental support is surprisingly scarce.
