BIOL 1202 Midterm: Bio1202 Test 2 (Got A+ on the test)
Document Summary
Cell surface structures: cell wall (cid:222) maintains cell shape, provides physical protection, prevents cell from bursting in a hypotonic environment composed of peptidoglycan in bacteria (cid:222) may also have an outer phospholipid membrane. Internal organization: prokaryotes do not have membrane bound organelles, some do have specialized membranes that perform metabolic functions (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) Major nutritional modes in prokaryotes table 27. 1 (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) (cid:222) Protists are nutritionally diverse: photoautotrophs contain chloroplasts, photosynthesize, heterotrophs absorb organic molecules or ingest larger particles, mixotrophs combine photosynthesis and heterotrophic nutrition (cid:222) (cid:222) (cid:222) (cid:222) Ciliates: alveolate, names for their use of cilia to move and feed, have two nuclei (cid:222) macronucleus: controls everyday functions (cid:222) micronucleus: used in conjugation (cid:222) Bacillariophyta: diatoms: stramenophile, unicellular algae (photoautotrophs, silica test, major component of the phytoplankton, diatomaceous earth accumulated diatom tests in marine sediments used in toothpastes and filter media.
