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The World of Plants (B) Growing Plants W. McConnell 2004 Kinross High School 1. Give the function of the following parts of a seed Seed coat protection Embryo plant grows into new plant Cotyledon food store until the first green leaves appear W. McConnell 2004 Kinross High School 2. In the following experiment to investigate conditions for germination of cress seeds, what conclusion do you come to? Tube Conditions Present Conditions absent 1 2 3 4 heat heat light moisture heat moisture moisture oxygen oxygen w ater oxygen none w ater heat 0% 100% 0% 0% Percentage of seeds germinated Answer: •Seeds need oxygen, water and heat to germinate •Seeds do not need light to germinate W. McConnell 2004 Kinross High School 3.. Why can a large seed be planted deeper in the ground than a small seed? Answer: If a small seed was planted too deeply in the ground it would use up its food store (in the cotyledon) before the first green leaves appeared. W. McConnell 2004 Kinross High School 4.. What is the name given to the temperature at which seeds will germinate best at? Answer: The optimum temperature. W. McConnell 2004 Kinross High School 5.. Below is table to show what percentage of seeds germinate at different temperatures. What is the optimum temperature for germination ? o Temp ( C) 0 15 20 25 30 35 Answer: % Germination 0 50 100 40 30 8 20oC W. McConnell 2004 Kinross High School 6.. Why was there no germination at 00C ? o Temp ( C) 0 15 20 25 30 35 Answer: % Germination 0 50 100 40 30 8 Because it was too cold for the enzymes involved in germination to function. W. McConnell 2004 Kinross High School 7.. Give the function of each of the following parts of a flowering plant Petal colour / scent to attract insects Sepal protects the bud before it opens Anther produces pollen Nectary contains nectar to feed insects W. McConnell 2004 Kinross High School 8.. What is the definition of fertilisation? Answer: Joining together the male and female gamete. W. McConnell 2004 Kinross High School 9.. What is meant by pollination in a flowering plant? Answer: ? The process by which pollen grains travel from anther to stigma. W. McConnell 2004 Kinross High School 10.. What is the difference between self pollination and cross pollination? a) Self Pollination means Pollen is transferred from anther to stigma of the same flower. b) Cross pollination means - Pollen is transferred from anther to stigma of a different flower. W. McConnell 2004 Kinross High School 11.. What is the difference between wind pollination and insect pollination? a) Wind Pollination means Pollen grains are transferred by the wind. b) Insect pollination means Pollen grains are transferred by insects. W. McConnell 2004 Kinross High School 12.. Below is a table comparing the structure of wind and insect pollinated flowers. Fill in the gaps. Insect Pollinated Petals large and coloured Sticky, spiky pollen Scented Usually produce nectar W. McConnell 2004 Kinross High School Wind Pollinated Petals small and green Small, light pollen No scent Never produce nectar 13.. Below you will see a list of flowers. Which are insect pollinated and which are wind pollinated? •Buttercup - Insect •Grass Wind - •Dandelion - Insect •Barley - Wind •Tulip - Insect •Lavender - Insect W. McConnell 2004 Kinross High School 14.. •The pollen grain lands on the stigma. ______ • The male sex cell is inside the pollen _____ and grows a tube down through the ____ style to reach the female sex cell in the ovary. _____ W. McConnell 2004 Kinross High School 15.. What term describes the pollen nucleus joining with the ovule nucleus ? Answer: Fertilization W. McConnell 2004 Kinross High School 16.. Where does fertilization take place in a plant? Answer: In the ovary W. McConnell 2004 Kinross High School 17.. Name the structure which always contains the seeds. Answer: The fruit W. McConnell 2004 Kinross High School 18.. After fertilisation what do the following parts of the flower become? The flower stalk becomes.. the fruit stalk The ovary becomes.. the fruit The ovules become.. the seeds The petals,stamen,stigma.. wither and drop off W. McConnell 2004 Kinross High School 19.. By what method of dispersal are the following seeds scattered? •Dandelion - wind animal internal •Bramble - •Tomato - animal internal •Burdock - animal external - wind •Ash •Strawberry - animal internal water •Coconut W. McConnell 2004 Kinross High School 20. What is meant by asexual reproduction? Answer: •Only one parent involved •No sex cells produced •Producing new plants without forming seeds •No pollination involved W. McConnell 2004 Kinross High School 21. What type of asexual reproduction do the following plants display? A potato - tuber A strawberry - runner An onion bulb - W. McConnell 2004 Kinross High School 22. Which method of vegetative reproduction is the following statement describing? “special stems grow out from the parent plant and when they make contact with the earth, roots begin to grow. In time a new plant is produced.” Answer: A runner W. McConnell 2004 Kinross High School 23. Give some disadvantages of asexual reproduction. Answer: Plants may be overcrowded No variation of plant characteristics Any undesirable characteristics will be passed on W. McConnell 2004 Kinross High School 24. Give some of the advantages of asexual reproduction. Answer: •Rapid growth – available food stores from parent •No vulnerable stages of germination and early seed growth •Colonies of the same kind of plant will form – no room for competition W. McConnell 2004 Kinross High School •How many of the questions did you answer correctly? These revision questions will automatically run again. If you want to return to the list of revision topics click on the back browser on your toolbar. W. McConnell 2004 Kinross High School