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

a) only phospholipids create cholesterol.
b) only phospholipids do not contain fatty acids.
c) only steroids are both hydrophobic and hydrophilic.
d) only steroids have a four-ring carbon structure.

i think it's d

Cancer cells spread to other parts of the body by entering the bloodstream. which of the following organs could prevent a cancer cell in the bloodstream from spreading, and why? a. the spleen, because it releases lymphocytes into the blood b. the peyer's patches, because they release lymphocytes into the blood c. the lymph nodes, because they release lymph into the blood d. the thymus, because it releases lymph into the blood