Compare organisms in the table. which of the following explains why the pawpaw belongs in the kingdom plantae, but blue-green algae does not? the pawpaw absorbs carbon dioxide and releases oxygen, unlike blue-green algae. the pawpaw contains chlorophyll for photosynthesis, unlike in blue-green algae. the pawpaw is able to produce its own food for energy, unlike blue-green algae. the pawpaw is composed of many cells containing organelles, unlike blue-green algae.