Which of the following correctly explains how steroids and phospholipids are different?

1) only phospholipids create cholesterol.
2) only steroids have a four-ring carbon structure.
3) only phospholipids do not contain fatty acids.
4) only steroids are both hydrophobic and hydrophilic.

i think it might be 2 but i'm not completely sure, can anyone ?

Which muscle is responsible for inhalation ?

The fish shown above is a tarpon. it is a fast-swimming and powerful open-water fish. its closest relatives, oddly, are burrow-dwelling conger eels that stay on the bottom. both eels and tarpon developed from snake-like larvae that float in the plankton during the first stages of life. once they mature, tarpon and eels are not found near one another in the ocean. the tarpon and the eel illustrate all of the following except

Most of the carbon on earth is stored in the form of