This description is unspecific and is confusing...
The nose has different functions mainly for inhalation of oxygen and exhalation of carbon dioxide which is called the respiration process or gas exchange. As a sensory organ, the nose has also another function which is olfaction, the ability to smell.
Olfaction in a biopsychological term, is the process by which sensory information recognized by the nasal receptors are transduced in a understandable and recognizable stimulus or rather perception, in simplest term is to smell.
Therefore, nasal receptors are the structures that send messages to the facial nerve which is responsible for sending the information to the brain for it to be perceived and acknowledge.
Answer:
1:4
Explanation:
30%= 
18%= 
<em>Rewrite the given information:</em>

<em>Multiply by 100 throughout:</em>
30(B -A)= 18(B+A)
<em>Divide by 6 throughout,</em>
5(B -A)= 3(B +A)
<em>Expand</em>
5B -5A= 3B +3A
<em>Bring</em><em> </em><em>A</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>1</em><em> </em><em>side</em><em> </em><em>and</em><em> </em><em>B</em><em> </em><em>terms</em><em> </em><em>to</em><em> </em><em>another</em><em>:</em>
5B -3B= 5A +3A
<em>Simplify</em>
2B= 8A
<em>Divide by 2 throughout:</em>
B= 4A
Now, we have to find the ratio of A to B.
B= 4A
<em>Divide by 4 throughout:</em>
A = 
<em>Divide by B on both sides:</em>

Thus, A:B= 1:4
Answer:
Morphology means the study of the forms and structure of organisms and their features. Which means that some challenges that viruses might face are less of the groups if that makes sense.
Explanation:
A virus is made up of four groups. The filamentous, isometric, head, and tail. Which means that the virus could possibly have less of it's parts because morphology is the study of how it FORMS.
(i hope this helps)
The contractile vacuole expels water out of the cell by contrasting.
5)False
6)False
7)True
8)false