Cholesterol, which is part of animal cell membranes, is what type of molecule?
a. carbohydrate
b. lipid
c. protein
d. nucleic acid

Aplant has an egg with 34 chromosomes how many chromosomes does a leaf cell of that plant have

The skeletal system performs a variety of functions that are crucial to maintaining life processes. what function is performed in the bone marrow, but not in the ossified bones of the skeleton? a oxygen transportation c mineral storage b. muscle attachment d red blood cell production

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules