All of the following are characteristics of an autotroph except synthesizes its own food
can synthesize glucose
O consumes other organisms for energy
tend to be found in the first trophic level

Which kind of worm has a closed circulatory system? a planarian b fluke c pinworm d an earthworm

Nucleic acids offer variability because they contain alternate forms of genes called .

Select the correct answer. which statement applies only to the axial skeleton, not the appendicular skeleton? a. it contains a pivot joint. b. it has muscles attached that work in pairs. c. it contains red bone marrow. d. it possesses fossa for bone articulation. e. it protects the heart and lungs.