Lesson 5- Protists 2 Flashcards
Clade Rhizaria (supergroup SAR)
hair/threadlike pseudopodia, both planktonic and amoeboid forms
Phylum Radiolaria (clade rhizaria, supergroup SAR)
planktonic, silicate shells, many have algal symbionts
Phylum Foraminifera (clade rhizaria, supergroup SAR)
planktonic, calcium carbonate shells, algal symbionts, make up sand
Supergroup Archaeplastida
Photosynthetic (rhodophyta, chlorophyta, charophyta)
Phylum Rhodophyta (red algae, supergroup archaeplastida)
red chlorophyll lets them absorb blue light in the deep sea, mostly unicellular, some multicellular, do alternation of generations
Phylum Chlorophyta (green algae, supergroup archaeplastida)
can be unicellular, form colonies, multicellular, multinucleate
Phylum Charophyta (green algae, supergroup archaeplastida)
closest land-plant relatives, have sporopollenin, which is waterproof, have both asexual and sexual phases, (conjunction tubes)
Supergroup Unikonta
Chemoheterotrops (Amoebozoa, Fungi)
Plasmodial slime mold (Phylum Amoebozoa, Supergroup Unikonta)
Multinucleate, diploid dominant
Cellular slime mold (Phylum Amoebozoa, Supergroup Unikonta)
Unicellular, haploid dominant
Tubulinids (Phylum Amoebozoa, Supergroup Unikonta)
Single-celled solitary amoeba
Plasmodial slime mold life cycle
A diploid, single-celled amoeba becomes a multinucleate feeding plasmodium which, due to stress, becomes a diploid sporangium. This undergoes meiosis to produce haploid spores, which become haploid flagellated cells that eventually become amoeba.
Cellular slime mold life cycle
Haploid solitary amoeba undergoes fertilization to produce a diploid zygote which does meiosis to return to its original state.
If the amoeba experiences stress, it sends out a signal causing other amoeba to aggregate and become a slug which moves as one organism. Eventually, the slug plants itself somewhere and forms a fruiting amoeba that releases spores which turn back into solitary amoeba.
