Marine Botany M id ter m 2 014 Name:_________________________ Compare and Contrast the following items (20pts): 1) spore vs gamete 2) monoecious vs dioecious 3) phycoplast vs. phragmoplast 4) haplontic vs diplontic 5) parenchymatous vs. coenocytic thallus construction 1 Marine Botany M id ter m 2 014 Name:_________________________ Match with the correct Division: Chlorophyta, Heterokontophyta, both, or neither (12 points) a. Plantae ____________________ b. Chlorophyll A ____________________ c. Flowers ____________________ d. Phycobilins ____________________ e. Amylose ____________ f. Thylakoids in stacks of 2-6 ____________ g. Bacteria __________________ h. Flagella _________________ i. Haplontic forms ______________ j. 2 symobiotic events ______________ k. Stramenopiles _______________ l. Mannitol______________________ Match the following Classes or Orders to the appropriate characteristic, term, or genus. Each term will be used only once. (10 points) Cladophorales ________ A. parenchymatous thallus Ulotricales________ B. clockwise basal body orientation Chlorophyceae _________ C. marimo balls Charophyceae ________ D. modern representative of ancestral green (most primitive) Trebouxiophyceae ________ E. one nucleus & radial symmetry Dasycladales________ F. e.g. Prasiola Caulerpales ________ G. broad band microtubule roots, closely related to land plants Fucales ________ H. monoecious or dioecious Prasinophyceae_________ I. group contains coenocytic mass-spawners Ulvales __________ J. Codiolum phase 2 Marine Botany M id ter m 2 014 Name:_________________________ Define the terms below (20pts): 1) algae: 2) physode: 3) hypnozygote: 4) saxicolous: 5) plurilocular sporangia : 6) functional anisogamy: 7) pneumatocyst: 8) holocarpic reproduction: 9) ectocarpene: 10) alginic acid: 3 Marine Botany M id ter m 2 014 Name:_________________________ Create a dichotomous key to separate the following genera: Fucus, Codium, Silvetia, Chlamydomonas, Cladophora. You may not use taxonomic na me s of divisions, classes, or orders, but should instead use cha racteristics of the divisions, classes, orders or genera (10 pts) Please label the components (A through E) of the P-I curve below (7pts): A__________ (y axis) B __________ E C __________ A D __________ (x axis) C E __________ B D What aspect of the light reactions in photosynthesis might cause a higher value for P-max? 4 Marine Botany M id ter m 2 014 Name:_________________________ Dra w a life history diagram as indicated below. Please label all stages of the life cycle, and include the ploidy (N or 2N) of all stages, when meiosis and mitosis occur, and sketch (very generally) what the algae look like. (20 pts) 1) Circle the order you are illustrating: Either Ulotrichales or Fucales What type of life history does it exhibit?___________________ 2) Isomorphic Alternation of Generations: What order exhibits this life history?_____________________ 5 Marine Botany M id ter m 2 014 Name:_________________________ Short Ans wer (25 pts): 1. What determines the upper and lower limits of algae in the intertidal? 2. Explain how Lubchenco & Cubit changed the way people thought about heteromorphic life histories of certain marine algae as adaptations to variation in herbivory. 3. In the paper by Sousa, Disturbance in marine boulder fields: the non equilibrium maintenance of species diversity. Which size boulders had the highest diversity? How did he determine this? 4. Explain the phenology of sexual reproduction by green algae on Caribbean Coral Reefs as described by Clifton and Clifton. 6 Marine Botany M id ter m 2 014 Name:_________________________ 5. What happens during a secondary endosymbiotic event? Short essay: (10 pts) 1) Light is one of the most important factors affecting photosynthetic organisms. Describe in detail the effects of light on algal growth. Include in your answer a description of light attenuation (what is it, how do different wavelengths respond, and how do algae deal with it). 2) The rocky intertidal is a rough place to be an alga and yet there is high algal diversity. Please describe the challenges that algae in the rocky intertidal face and adaptations these algae have to overcome such harsh conditions. 7 Marine Botany M id ter m 2 014 Name:_________________________ 8 .