Heart,eyes,blood vessels and skeleton people.
The answer is (B. Medium) because it has to travel through the ear drum evenly without busting it. Hope this helped :)
Answer:
D) largest mass extinction event in Earth's history
Explanation:
The cambrian era started following the pre-cambrian extinction
Phospholipids are made up of fatty acids, glycerol, and phosphate.
If you're referring to the structure of a phospholipid, they are composed of a water-loving (hydrophilic) head and a water-fearing (hydrophobic) tail. The tail is made up of long chains of hydrogen and carbon molecules as well.
