BIOL 1020 Lecture Notes - Hydrothermal Vent, Cell Membrane, Nuclear Membrane
Document Summary
Allow cells have: plasma membrane, semifluid substance called cytosol (water, ions, molecules, chromosomes (carry genes, ribosomes (make protein) Prokaryotic cells have: no nucleus, dna in an unbounded region called the nucleoid, no member-bound organelles, cytoplasm bound by the plasma membrane. Figure 25. 9: serial endosymbiosis theory of the origin of the eukaryotic cell: favored with ancestral photosynthetic eukaryote. Highly effect at taking energy from the sun: key evidence supporting set: similarities in inner membrane structures and functions between organelles and prokaryotes cell division is similar in these organelles and some prokaryotes. These organelles transcribe and translate their own dna. Their ribosomes are more similar to prokaryotic than eukaryotic ribosomes. Absorb organic molecules or food particles: mixotrophs. Absorbed over membranes: reproductive diversity, asexual and/or sexual forms, many taxa incorporate resting (cyst) stages, many, especially parasitic ones, have complex, indirect life cycles. Fiver supergroups of eukaryotes: this is one hypothesis about the evolutionary relationships among the eukaryotes.
