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| Read each sentence and identify the word/phrase that you believe correctly completes the statement. Then, click on the arrow to see if your answer is correct. 1. Members of the domains Bacteria and Archaea are organisms and therefore their cells lack a nucleus and other membrane-bound organelles. 2. Symbiotic bacteria may be responsible for in pufferfishes. 3. Not all autotrophic bacteria are . For instance, some derive energy from H2S and other inorganic compounds. 4. are mostly autotrophs but some ingest organic particles. Many are : that is, capable of producing light. 5. Protozoans such as foraminiferans and radiolarians are unicellular and are therefore included in the kingdom . 6. Diatom cells are enclosed in cell walls made largely of . 7. Nitrogen fixation is carried out by . |