2 1. Give the function of the following parts of a seed Seed coat protectionEmbryo plantgrows into new plantCotyledonfood store until the first green leaves appear
3 2. Answer: Seeds need oxygen, water and heat to germinate In the following experiment to investigate conditions for germination of cress seeds, what conclusion do you come to?Answer:Seeds need oxygen, water and heat to germinateSeeds do not need light to germinate
4 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.
5 4..What is the name given to the temperature at which seeds will germinate best at?The optimum temperature.Answer:
6 5..Below is table to show what percentage of seeds germinate at different temperatures. What is the optimum temperature for germination ?Answer:20oC
7 6.. Why was there no germination at 00C ? Answer:Because it was too cold for the enzymes involved in germination to function.
8 7.. Petal Sepal Anther Nectary Give the function of each of the following parts of a flowering plantPetalSepalAntherNectarycolour / scent to attract insectsprotects the bud before it opensproduces pollencontains nectar to feed insects
9 8.. Joining together the male and female gamete. What is the definition of fertilisation?Answer:Joining together the male and female gamete.
10 ? 9.. The process by which pollen grains travel from anther to stigma. What is meant by pollination in a flowering plant?Answer:?The process by which pollen grains travel from anther to stigma.
11 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.
12 11..What is the difference between wind pollination and insect pollination?Wind Pollination means -Pollen grains are transferred by the wind.b) Insect pollination means -Pollen grains are transferred by insects.
13 12.. Insect Pollinated Wind Pollinated Petals large and coloured Below is a table comparing the structure of wind and insect pollinated flowers. Fill in the gaps.Insect PollinatedWind PollinatedPetals large and colouredPetals small and greenSmall, light pollenSticky, spiky pollenScentedNo scentUsually produce nectarNever produce nectar
14 13.. Buttercup - Grass - Dandelion - Barley - Tulip - Lavender - Below you will see a list of flowers. Which are insect pollinated and which are wind pollinated?Buttercup -GrassDandelion -BarleyTulipLavender -InsectWindInsectWindInsectInsect
15 14.. stigma. The pollen grain lands on the________ The male sex cell is inside the __________and grows a tube down through the _________to reach the female sex cell in the________stigma.pollenstyleovary.
16 15..What term describes the pollen nucleus joining with the ovule nucleus ?Answer:Fertilization
17 16.. In the ovary Where does fertilization take place in a plant? Answer:In the ovary
18 17.. A fruit Name the structure which always contains the seeds. Answer:A fruit
19 18..After fertilisation what do the following parts of the flower become?The flower stalk becomes..The ovary becomes..The ovules become..The petals,stamen,stigma..the fruit stalkthe fruitthe seedswither and drop off
20 19.. By what method of dispersal are the following seeds scattered? Dandelion -BrambleTomatoBurdockAshStrawberry -Coconutwindanimal internalanimal internalanimal externalwindanimal internalwater
21 20. What is meant by asexual reproduction? Answer: Only one parent involvedNo sex cells producedProducing new plants without forming seedsNo pollination involved
22 21. What type of asexual reproduction do the following plants display? A potatoA strawberry -An oniontuberrunnerbulb
23 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
24 23. Give some disadvantages of asexual reproduction. Answer: Plants may be overcrowdedNo variation of plant characteristicsAny undesirable characteristics will be passed on
25 24. Give some of the advantages of asexual reproduction. Answer: Rapid growth – available food stores from parentNo vulnerable stages of germination and early seed growthColonies of the same kind of plant will form – no room for competition
26 How many of the questions did you answer correctly? If you got any wrong, go back to the beginning and try again!