Presentation is loading. Please wait.

Presentation is loading. Please wait.

Ch. 5 & 6- Flowers & Fruits. Angiosperms (flowering plants) Unique among plants because they have sexual reproductive structures contained in a flower.

Similar presentations


Presentation on theme: "Ch. 5 & 6- Flowers & Fruits. Angiosperms (flowering plants) Unique among plants because they have sexual reproductive structures contained in a flower."— Presentation transcript:

1 Ch. 5 & 6- Flowers & Fruits

2 Angiosperms (flowering plants) Unique among plants because they have sexual reproductive structures contained in a flower –derived from modified leaves seeds form inside fleshy fruit pollinated by insects or other animals Fruit as an adaptation for seed dispersal: Red berries and dandelion

3

4

5

6 Flower arrangements Perfect: both stamens & carpels Imperfect: missing either stamens or carpels –Monoecious: both male & female flowers on same plant –Dioecious: male & female flowers on separate plants The structure of a flower female male Embryo sac fruit seed

7 lily

8 Fig. 42.9

9 Fig

10 Fig

11 monoecious species, male (left) and female (right) begonia flowers

12 Fig

13 Pollination place pollen onto stigma of a carpel pollination agents –grasses, many trees: wind –many angiosperms: animals, including insects –self-pollination A relationship between an angiosperm and its pollinator: Hummingbird and flower (left); bee and Scotch broom (right)

14 How do flowers attract the pollinator of choice? Insect: bright, showy petals with fragrant aromas, rich in nectar –E.g.: moths=white, night; flies=smelly Hummingbird: bright, often red, no aroma Wind: small and inconspicuous with copious production of dry, lightweight pollen

15

16

17

18 Fig. 42.1

19 Fig

20 Fig

21 Fig. 42.5

22

23 Fig. 42.6

24 Fig

25 Fig

26 Fig

27 Fig

28 Fig

29 Fruits What is a fruit? What are the purpose of fruit? How is a fruit formed?

30 Fruit = mature ovary purpose: protects seeds, dispersal aid Relationship between a pea flower and a fruit (pea pod)

31 Fruit or vegetable? botanical: –Ripened ovary Legal –Something that tastes sweet and is eaten as dessert

32 Types of Fruits Dry fruits: Tough or papery pericarp Fleshy fruits: Soft and juicy pericarp –Drupe –Berry –Aggregate –Multiple –Accessory

33 Development of fruit from flower simple = 1 ovary of 1 flower –e.g., cherry, soybean pod compound = multiple ovaries –aggregate = of one flower e.g., raspberry, blackberry –multiple = of many flowers (inflorescence) e.g., pineapple accessory = parts other than ovary –e.g., strawberry, apple, melon, tomato drupe berry

34 Fig a

35 Fig b

36 Fig c

37 Fig d

38 Fig

39 Fig

40 Fig

41

42 Seeds Contain embryonic plant plus nutritive tissue & tough outer coat Starting point for next generation

43 Fig. 40.2a

44 Fig. 40.2b

45 Cotyledons (embryonic leaves) Single cotyledon = monocot Two large cotyledons = dicot Cotyledons can be fleshy or leafy Cotyledons can be kept belowground or elevated above ground

46 Fig. 40.7

47 Seed Germination imbibition: absorption of water mobilization of food reserves –enzyme activity digests endosperm (converts starch to sugar)

48 Seed Germination emergence of radicle –detects gravity & grows downward epicotyl emerges through soil surface light cues upward & straighter growth

49 Fig With light: Green Shorter Open cotyledons Straight stem Without light: Yellow Elongated Closed cotyledons Hooked stem

50 Fig

51 Fig a

52 Fig b

53

54

55 Fig

56 Fig. 41.7

57 Fig. 41.8

58 Fig. 41.9

59 Fig

60 Fig

61 Fig

62 Fig

63

64 Fig

65 Fig

66 Fig

67 Fig


Download ppt "Ch. 5 & 6- Flowers & Fruits. Angiosperms (flowering plants) Unique among plants because they have sexual reproductive structures contained in a flower."

Similar presentations


Ads by Google