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

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

How does the study of genetic disorders such as pku biologists understand normal alleles?

Which of the following types of pollution is most responsible for large numbers of deaths worldwide because of unsafe drinking water? (a) nutrient pollution (b) thermal pollution (c) pathogen pollution (d) sediment pollution