1. Reproduction in Flowering Plants
WALT – Explain how plants reproduce Sexually
Mr. Stuart
Living Environment

2.  Identify and draw, using a hand lens if necessary, the
sepals,
petals,
stamens,
anthers, carpels,
ovaries and
stigmas of one, locally available, named, insect-pollinated, dicotyledonous flower,

3. Sexual Reproduction
Using the gametes from 2 parents to produce genetically unique individuals

4. Flower Sexual reproductive structure Produces egg and sperm
Fertilization takes place inside the flower

5. Which is the most accurate statement
Which is the most accurate statement? The principal role of a flower in the life cycle of a plant is:
(a) attracting insects
(b) producing seeds
(c) producing pollen
(d) producing nectar

6. *Stigma –top of the carpel, Sticky surface for pollen to stick to
Female reproductive organ
Male reproductive organ
Pistil/ Carpel
*Stigma –top of the carpel,
Sticky surface for pollen to stick to
*Style – connects the stigma to the ovary
*Ovary –contains ovules
( eggs)
Stamen
*Anther – produces sperm nuclei by meiosis. Sperm nuclei are enclosed by pollen grains.
*Filament – holds the anther up

7. Female Male Pistel = many Carpels
What features of flowers might attract insects?
Which part of the flowers become a the seed and be the fruit?

8. Draw an accurate diagram of a flower and include both Male/ Female Organs
Pg 67

9. Pollination

10. Pollination WALT –
Explain the Transfer of mature pollen grains from the anther to the stigma using
-wind
-insects
-birds & other animals

11. Name the agents of pollination
Compare the different structural adaptations of
insect-pollinated and wind-pollinated flowers
Describe the growth of the pollen tube and its entry into the ovule followed by fertilisation (production of endosperm and details of development are not required)

12. and examine the pollen grains under a light microscope or in photomicrographs

14. Pollination as the transfer of pollen grains from the male part of the plant (anther of stamen) to the female part of the plant (stigma)

15. Draw in your books
Cross Pollination

17. Self pollination –pollen from same flower
*Self pollination –pollen from same flower *Cross pollination – pollen from a different flower - more variation

18. Because nature doesn’t like self pollination, often it is rejected

20. When a pollen grain lands on the stigma, it sticks and a pollen tube grows down through the style to an ovule (egg)

21. Wind v Insect Pollination
Wind pollinated flowers are different in structure from insect pollinated ones.
[You need to be able to explain the main differences. This table will help to make these clear for you]
Insect pollinated flowers - rose sweet pea
Wind pollinated flowers - ragweed

22. Insect Pollinated
Wind Pollinated

23. Insect Pollinated
Wind Pollinated
Use the information on pg – Wind Pollinated Plants to help you fill the table in

24. large, brightly coloured petals - to attract insects
Insect Pollinated
Wind Pollinated
large, brightly coloured petals - to attract insects
small petals, often brown or dull green - no need to attract insects

25. often sweetly scented - to attract insects
Insect Pollinated
Wind Pollinated
large, brightly coloured petals - to attract insects
small petals, often brown or dull green - no need to attract insects
often sweetly scented - to attract insects
no scent - no need to attract insects

26. moderate quantity of pollen - less wastage than with wind pollination
Insect Pollinated
Wind Pollinated
large, brightly coloured petals - to attract insects
small petals, often brown or dull green - no need to attract insects
often sweetly scented - to attract insects
no scent - no need to attract insects
usually contain nectar - to attract insects
no nectar - no need to attract insects
moderate quantity of pollen - less wastage than with wind pollination
pollen produced in great quantities - because most does not reach another flower

27. pollen often sticky or spiky - to stick to insects
Insect Pollinated
Wind Pollinated
large, brightly coloured petals - to attract insects
small petals, often brown or dull green - no need to attract insects
often sweetly scented - to attract insects
no scent - no need to attract insects
usually contain nectar - to attract insects
no nectar - no need to attract insects
moderate quantity of pollen - less wastage than with wind pollination
pollen produced in great quantities - because most does not reach another flower
pollen often sticky or spiky - to stick to insects
pollen very light and smooth - so it can be blown in the wind and stops it clumping together

28. anthers firm and inside flower - to brush against insects
Insect Pollinated
Wind Pollinated
large, brightly coloured petals - to attract insects
small petals, often brown or dull green - no need to attract insects
often sweetly scented - to attract insects
no scent - no need to attract insects
usually contain nectar - to attract insects
no nectar - no need to attract insects
moderate quantity of pollen - less wastage than with wind pollination
pollen produced in great quantities - because most does not reach another flower
pollen often sticky or spiky - to stick to insects
pollen very light and smooth - so it can be blown in the wind and stops it clumping together
anthers firm and inside flower - to brush against insects
anthers loosely attached and dangle out - to release pollen into the wind

29. stigma inside the flower - so that the insect brushes against it
Insect Pollinated
Wind Pollinated
large, brightly coloured petals - to attract insects
small petals, often brown or dull green - no need to attract insects
often sweetly scented - to attract insects
no scent - no need to attract insects
usually contain nectar - to attract insects
no nectar - no need to attract insects
moderate quantity of pollen - less wastage than with wind pollination
pollen produced in great quantities - because most does not reach another flower
pollen often sticky or spiky - to stick to insects
pollen very light and smooth - so it can be blown in the wind and stops it clumping together
anthers firm and inside flower - to brush against insects
anthers loosely attached and dangle out - to release pollen into the wind
stigma inside the flower - so that the insect brushes against it
stigma hangs outside the flower - to catch the drifting pollen

33. Fertilization
The sperm travels through the pollen tube to the ovule. The sperm & egg fuse forming the zygote (fertilized egg) –this grows into the plant embryo (cells grow by mitosis)

34. The ovary and zygote (fertilized ovule) develop and ripen.
*The ovule forms the seed and the ovary forms the fruit.
A fruit is a ripened ovary

35. Germnination
WALT – Understand the process of germination

36. The plant embryo uses food stored in the cotyledon of the seed until it develops leaves for photosynthesis

37. Cotyledon – Leaf inside seed that supplies food to growing embryo

38. Seedling
micropyle –opening in ovule where pollen tube attached and sperm entered hilum –scar where ovule attached to ovary radicle –embryonic root

39. Epicotyl – grows above the cotyledons and gives rise to the leaves.
Hypocotyl –below the point of attachment of the cotyledon, develops into the stem.

40. Parts of a seed Dicot Monocot Seed coat Hypocotyl Epicotyl Cotyledons
Endosperm
Radicle
Cotyledon
Dicot
Monocot

41. Seed Germination
Monocot
Dicot
Hypogeous
Epigeous
Radicle

43. Page 71 72 74 76
Question 1 2 5 3 4
Marks

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