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نموذج اجابة

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15- When both staminate and pistillate flowers are arising on the sameplant, the plant is described as …a- polygamo-monoecious plant. b-polygamo-dioecious plant.c- monoecious plant. d- dioecious plant.16- What of the following characters belonging to the aestivation offlower?a- tetradynamous. b- quincuncial.c- monadelphous. d- free central.17- The outermost floral whorl is lies ………………..a- before gynoecium. b- before androecium.c- before corolla. d- none of the above.18- In Gossypium plant, the fruit dehiscence is …..a- septifragal. b- loculicidal.c- septicidal. d- none of the above19- Any of the following systems is considered among the naturalones ………..a- System of Bentham & Hooker. b- System of Linnaeus.c- System of Engler. d- System of Bessey.20- The essential floral organs are ...a- calyx and epicalyx. b-androecium and gynoecium.c- calyx and corolla . d- all the above.II- Write the scientific expression of the following definitions:1- The staminate whorl of the flower. ( Androecium )2- The cross pollination. ( Allogamy )3- The metamorphosed shoot system bearing the floral organs atspecial nodes. ( The flower )4- Cohesion of the filaments only, but anthers are free. ( Adelphous )5- The male gametophyte in the flowering plants. ( Pollen grain )6- Inverted ovule. ( Anatropous ovule )7- Cushion-like structure to which ovules are found attached withinthe ovary. ( Placenta )8- The placing of a plant or group of plants in groups or categoriesaccording to a particular plan or sequence. ( Classificationprincipal )


9- The mature pollinated and fertilized ovary or gynoecium of theflower. ( The fruit )10- The primitive cymose inflorescence. ( Compound dichasium ).III- Correct the underlined words in the following sentences:1- In dicotyledonous plants, the flowers are tricyclic (tetracyclic orpentacyclic) and the stem with scattered (arranged in cylinder)vascular bundles.2- Cocos nucifera fruit belonging to simple dry (simple fleshy drupe)fruits, while Malva fruit is called caryopsis (carcerulus).3- Selicula fruit belonging to schizocarpic fruits (dehiscent fruits).4- In didynamous stamens, the number is two (four), but intetradynamous is four (six).5- In compound spike, the spike axis is called receptacle(rachis), while the spikelet axis is called peduncle(rachilla).6- Cruciform shaped of petals is irregular (regular) andgamopetalous (polypetalous).7- In marginal placentation, the gynoecium is polycarpellary(monocarpellary) and multilocular (unilocular).8- Among the principles of evolution, the syncarpous (apocarpous)condition is primitive, but the bisexual (unisexual) form is moreadvanced.9- Theophrastus classified the plants into three groups (four groups)on the basis of their cotyledons (their habit).10- In moncotyledonous plants, leaves are with reticulate venations(parallel venation).With all my best wishesDr. M.A. Elgalaly

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