Reproductive Ecology — DU B.Sc. (Hons.) Botany Previous Year Question Papers

Name of tlie Course Reproductive Ecology All questions cany equal marks. Draw well lal)elled diagrams wherever necessary. Q.1. (a) Match the following: Q.1. (b) a. Bees b. Outbreeding device c. Wallisneria d. Flies e. Orchids Define any five of the following terms: i. Floral foragers ii. Sporophytic self-incompatibility iii. Anemochory iv. Gynodioecious v. Polysymmetry vi. Habitat fragmentation Q.1. (c) Fillinthe blanks: i. Dichogamy promotes ............... pollination. ii. The occurrence of male and female flowers on the different plant is known as ............ iii. A thin proteinaceous layer present on the surface of dry stigma is known as -iv. A correlation between floral trait and pollinating agent is known v. as...................... Spatial separation of the anthers and the stigma in bisexual flowers is called Q.2. Differentiate between any three of the following: i. Autogamy and xenogamy ii. Mutualistic and non-mutualistic pollination iii. Anemochory and zoochory iv. Orthodox and recalcitrant seed Q.3. Write short notes on any three of the following: i. Factors affecting pollen-pistil interaction ii. Pollinator guilds iii. Mellitophily iv. Factors affecting seed germination Q. 4. (a) Discuss the impact of invasive species on reproductive biology of plants. (b) Describe in details the characteristics features of anemophilous plants. Q. 5. (a) Explain the role of pollinators in reproductive success of plants. What are the consequences of pollinator decline? (b) Write down the ecological significance of seed dispersal and also explain the primary and secondary mode of dispersal.