Akey difference between green algae and land-based plants is that a. land-based plants don't have vascular tissue and must absorb nutrients directly from the environment. b. green algae don't have chloroplasts and absorb their food rather that perform photosynthesis. c. green algae don't have vascular tissue and must absorb nutrients directly from the environment. d. land-based plants breath in carbon dioxide while green algae consume oxygen.

bc blah

explanation:

bc blah

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these macromolecules could either be amino acids, proteins or nucleic acids. they are responsible for the chemical changes and reactions that affects largely the cell and its composition. take for instance the cytoplasm of the cell where these organelles are settled. these simple organelles are composed of macromolecules which ignites and catalyses different functions that enables cells, in macro-perspective in motion and metabolism. in intestines for example, metabolism happens and breaking down parts of a food to simpler compounds that are used and these nutrients delivered throughout the body and again broken down by into smaller components.