(Q).
If clams feed on plankton and nonliving organic matter, then what do clams feed on? Answer choices: - Plankton - food - glucose - Fish - Flowers - Energy. - Energy - Other clams
(A).
Plankton

(Q).
If segmented animals can have closed circulatory systems, then what kind of circulatory system can some segmented animals have? Answer choices: - organ - insects - made - warm - three - complex - closed - epidermal
(A).
closed

(Q).
If mutations are required for species to change over time, then the changes in species that have been seen over time required? Answer choices: - Energy - exercise - strong microscopes - mutations - gene splicing - warm weather - vegetation - Energy.
(A).
mutations