Answer:
Crystals are Grouped by Properties
There are four main categories of crystals, as grouped by their chemical and physical properties. Covalent Crystals: A covalent crystal has true covalent bonds between all of the atoms in the crystal. ... This leaves the outer electrons of these atoms free to float around the lattice.
The statement that describes a method by which the body prevents airborne pathogens from entering the lungs during respiration is as follows: the mucus in the nose traps microscopic particles and bacteria while nose hairs filter out larger particles.
<h3>What is the role of the lungs?</h3>
The lungs are biological organs of vertebrates that controls breathing and oxygenates the blood.
The lungs is the major breathing organ of the body and is connected to the nose through a pipe called trachea and bronchi.
However, to prevent unwanted or foreign particles in the atmosphere from entering into the lungs, the mucus in the nose helps trap the microscopic particles while the hairs in the nose blocks the passage of larger particles.
Learn more about lungs at: brainly.com/question/12937853
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I believe the answer is option A
It is a Chemical reaction taking place un a solution in which one or more of the products is insoluble in the solvent, and so forms solid particles that fall to the bottom of the reactor
When i say apes i mean monkeys
First question: tailbones, how other animals evolved
Second question: apes had tailbones, other animals have evolved.
Third Question: Both humans and apes had tailbones, shows that evolution does exist.