BIO 210 Exam 3 Practice Questions and Correct Answers
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Course
BIO 210
Institution
BIO 210
Phycology -study of algae
Pellicle -many interlocking, proteinaceous strips spiraling around the cell inside the plasma membrane; can be flexible or rigid
Lorica - a shell or case surrounding the cell; used for protection; rigid
Metaboly -metabolic movement- being able to change its body shape
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BIO 210 Exam 3 Practice Questions and Correct Answers Phycology ✅-study of algae Pellicle ✅-many interlocking, proteinaceous strips spiraling around the cell inside the plasma membrane; can be flexible or rigid Lorica ✅- a shell or case surrounding the cell; used for protection; rigid Metaboly ✅-metabolic movement - being able to change its body shape Mixotroph ✅- the ability of an organism to utilize both organic and inorganic carbon sources -photosynthetic forms can ingest or absorb food Why do we study algae in a botany class? ✅historically, considered to be simple plants Phylum Euglenophyta Characteristics of which lines of evolution? Which things are from which line? ✅Phylogenetic Enigma - all 3 of evolution *GreenLine Characteristic - Pigments - similarities of chloroplast structure and photosynthetic pigments suggest they evolved from endosymbiotic green algae ~ 1.5 to 1.4 bya Chloroplast and Pigments Chlorophyll A and B - appear bright green Carotenoids - similar to greens -lutein, b -carotene, neoxanthin Chloroplasts - 1 to many per cell; typically discoid -Thylakoids stack/ fuse into grana (rudimentary) * BrownLine Characteristic - Carbohydrate Storage Paramylon - b:1-3 glycoside linkage - like starch of the brown -line algae Stored in the cytoplasm -doughnut to rod -shaped *RedLine Characteristic -Lysine Biosynthesis AAA pathway -as in the red line Phylum Euglenophyta Mode of Nutrition? ✅Heterotrophs Phylum Euglenophyta Habitat? ✅Primarily freshwater organism; areas that are very nutrient rich Phylum Euglenophyta Flagella? ✅Two anterior flagella (1 -8) 1) non -emergent flagellum -short -remains in reservoir 2) emergent flagellum - long -comes out reservoir Phylum Euglenophyta Describe the tinsel flagella of Euglenoids ✅Mastigonemes on only one side Phylum Euglenophyta What is the orange structure in the body of a euglena? ✅- stigma (eyespot) Phylum Euglenophyta What type of starch? ✅- Paramylon Phylum Euglenophyta Sexual or Asexual Reproduce? How? ✅-Asexual -Longitudinal division from the reservoir backward Phylum Dinophyta Habitat? ✅- Aquatic marine and freshwater Phylum Dinophyta Endosymbionts of which organisms? ✅- sponges, jellyfish, sea anemones, corals, cephalopods, gastropods, etc Phylum Dinophyta What pigments? ✅- 50% of dinos are photosynthetic Rest: holotrophs and or osmiotrophs Phylum Dinophyta Modes of nutrition? ✅Mixotrophs
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