Which of the following best explains why carbon dioxide must be added to water? a. Carbon dioxide bubbles can’t be produced if it is not added to the solution.

b. Carbon dioxide maintains the green color seen in the plant.

c. Carbon dioxide is a needed reactant (input) of photosynthesis.

d. Carbon dioxide does not need to be added.

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

Drag the tiles to the correct boxes to complete the pairs. match each cell organelle with its description.

Some of the money that people deposit into a bank eventually becomes a interjection into the economy when the bank