What purpose do specialized cells serve? A. They help unicellular organisms carry out the functions of a
multicellular organism.
B. They come in contact with the external environment.
C. They convert multicellular organisms to unicellular organisms.
D. They carry out specific functions for a whole organism.

What's wrong with this ecological pyramid? (multiple choice)1. secondary consumers should be at the bottom of the pyramid2. the sun has an arrow leading to decomposers 3. primary consumers should come after the sun4. energy retained should increase from the bottom to the top5. the sun should be at the bottom of the pyramid