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PLANTS

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PLANTS Biennials Plants that complete their life cycle within two growing seasons. (violets) Perennials Plants that live for many years. (tulips) Pollen – PowerPoint PPT presentation

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Title: PLANTS


1
PLANTS
2
A Seed Plant is
  • A vascular plant that produces seeds
  • Vascular Tissue forms a system of tiny tubes
    that transport water, food, and other minerals
    through the plant

3
Xylem
  • Is vascular tissue that carries water and
    minerals UPWARDS from the roots through the plant.

4
Phloem
  • Is vascular tissue that carries food throughout
    the plant (both UP and DOWN)

5
Roots are important
  • To anchor the plant in the ground
  • To absorb water from the soil
  • To store food for the plant

6
A taproot system
  • Consists of a long, thick main root and thin,
    branching roots that extend out of the taproot.
  • For example, carrots and dandelions

7
A fibrous root system
  • Consists of several main roots that branch
    repeatedly to form a tangled mass of thin roots
  • For example, grass

8
Stems are important
  • To provide the means by which food, water, and
    minerals are transported from the roots to the
    leaves (xylem and phloem)
  • Hold leaves up to receive sunlight for
    photosynthesis

9
A herbaceous stem
  • Is soft and green
  • Sunflowers, dandelions, grass, tomatoes, etc.

10
A woody stem
  • Is rigid and strong
  • (contains woodcrushed xylem and phloem)
  • Lilac trees, rose bushes, maple trees, etc.

11
Leaves are important
  • To capture the suns energy and produce food and
    oxygen through the process of photosynthesis

12
A simple leaf
  • Has a blade that is in one piece
  • Maple leaf

13
Compound leaves
  • Have a blade that is divided into a number of
    separate leaf-like parts
  • Palm leaves, mountain ash leaves

14
Stomata
  • Are microscopic openings in the epidermis of a
    leaf that allow carbon dioxide to enter and water
    and oxygen to exit
  • Open during the day, closed at night

15
Transpiration
  • Is the process in which water is lost through the
    stomata in a plants leaves

16
During Photosynthesis
  • Green plants use sunlight, chlorophyll, water,
    and carbon dioxide to make sugar (food) and
    oxygen.

17
Flowers
  • Are structures that contain the reproductive
    organs

18
Sepal
  • Leaf-like structures that protect the developing
    flower (bud)

19
Petal
  • Colorful leaf-like structures that attract
    insects/animals with their colors and odors.

20
Stamen
  • Male reproductive organ
  • Thin stalk with small knobs on top

21
Filament
  • Stalk-like part of the stamen

22
Anther
  • Knob-like part of the stamen
  • Produces pollen

23
Pistil
  • Female reproductive organ found in the center of
    the flower

24
Stigma
  • Sticky tip of the pistil that collects pollen

25
The stigma is sticky
  • So that it can collect and retain pollen from
    itself and other flowers

26
Style
  • Slender tube that connects the stigma to the ovary

27
Ovary
  • Contains eggs, which when fertilized become known
    as seeds

28
Pollination happens
  • 1. When a grain of pollen lands on the stigma
  • 2. Pollen breaks open and a tube grows down the
    style to the ovary

29
Pollination
  • Is the process in which pollen is carried from
    male reproductive structures to female
    reproductive structures.

30
Fertilization happens
  • When a sperm cell emerges from the pollen tube
    and fertilizes the egg cell in the ovary.

31
3 Main Parts of a Seed
  • Young Plant (embryo)
  • Stored Food found in the seed leaves of the
    young plant
  • Seed Coat surrounds and protects the young plant

32
Seed Dispersal
  • The process in which seeds are carried away from
    a plant
  • Wind, animals (sticking to fur eating fruit and
    disposing of seeds elsewhere), water

33
Annuals
  • Plants that complete their life cycle within one
    growing season. (impatiens)

34
Biennials
  • Plants that complete their life cycle within two
    growing seasons. (violets)

35
Perennials
  • Plants that live for many years. (tulips)

36
Pollen
  • Is found within the male flower parts
  • Holds the cells that later become sperm cells
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