Which of the following explains why fossils of some extinct organisms have been found while others have not? A.
Fossils only exist for organisms that lived over 3 million years ago.

B.
Fossils only exist for organisms that had shells or hard outer body coverings.

C.
Most organisms die and decompose without leaving any fossil remains.

D. Only very large organisms have enough body mass to result in fossil formation.

Question 1 which of the following allows cells to take in fluids? a. phagocytosis b. pinocytosis c. exocytosis d. receptor-mediated endocytosis question 2 molecules move along their concentration gradient (from areas of high concentration to low concentration) using active transport mechanisms. a. true b. false question 3 which of the following powers active transport (ie. provides the energy for)? a. glucose b. transport proteins c. atp d. phospholipids question 4 what type of lipid is a major component of the plasma membrane? a. cholesterol b. phosopholipids c. proteins d. triglycerides