Not rounded:
0.005% of 100 = 0.005
Rounded to maximum 2 decimals:
0.005% of 100 ≈ 0.01
0.004% of 100 = ? ... 0.006% of 100 = ?
1% of 100 = ?
It is an example of uneasiness. It is because being anxious is a way of having to be worried to a specific thing or problem in which when a particular person is worried, he or she is likely feeling anxious as he or she seeks for something that will relieve his or her worries.
Blood needs to flow faster around the body in order to supply the muscles with oxygen for respiration
I believe this question is trying to get you to realize the difference between acquired traits(one you get through doing something during life) and heritable traits(ones from Mom/Dad). For example, I really wish I was 6 foot 4... but the height trait comes genetically from your parents since it is coded in my DNA how tall I will be, therefore this trait must be passed down genetically and somewhere down the evolutionary tree the humans in the region which my family comes from was better off being short. An example that comes from acquired traits could be muscularity... my parents are both not very muscular but throughout my lifetime I enjoy working out and have become much more muscular, no matter how much your parents or grandparents lift weights YOU won't change so that change must be acquired through aging during your lifetime. Now the amount of muscle your body can put on is a heritable thing but that is beside the point. Hope this helps :)
It indicates what elements is composed by and how many atoms of one element are linked to the other.
For example, this is the formula for table salt is:
NaCl
The formula indicates that table salt (sodium chloride) is composed by sodium (Na) and chlorine (Cl) on a 1:1 ratio.
Hope it helped,
BioTeacher101
