Loading presentation...

Present Remotely

Send the link below via email or IM

Copy

Present to your audience

Start remote presentation

  • Invited audience members will follow you as you navigate and present
  • People invited to a presentation do not need a Prezi account
  • This link expires 10 minutes after you close the presentation
  • A maximum of 30 users can follow your presentation
  • Learn more about this feature in our knowledge base article

Do you really want to delete this prezi?

Neither you, nor the coeditors you shared it with will be able to recover it again.

DeleteCancel

Make your likes visible on Facebook?

Connect your Facebook account to Prezi and let your likes appear on your timeline.
You can change this under Settings & Account at any time.

No, thanks

Unit 7

Plants
by

Steven Pratt

on 3 September 2012

Comments (0)

Please log in to add your comment.

Report abuse

Transcript of Unit 7

Unit 7: Plants
1. Cells contain a nucleus
2. Make their own food
3. Cells contain a cell wall
4. Multicellular
5. Can not move from place to place
Main Characteristics:
Nonvascular
produce seeds
flowers
"Angiosperms"
_________________________
ferns, horsetails
& club mosses
_________________________
may
Dicot
mosses & liverworts
Vascular
Plant Kingdom
can be
Pine trees & Evergreens
cones
"Gymnosperms"
can be
_________________________
_________________________
in
_________________________
_________________________
NOT produce seeds
such as
such as
_________________________
_________________________
such as
monocot
Types of Plants
1. Nonvascular Plants
Do NOT have conducting tissue (pipes) to transport water and nutrients.

These plants are small and use diffusion and osmosis to move materials.

Examples: mosses and liverworts
2. Vascular Plants
Contain conducting tissue (pipes) to deliver needed materials throughout the plant.

Vascular plants can be any size
Types of Vascular Plants
1. Plants without seeds.
Help form soil and prevent erosion
sporophyte - produce spores

Examples: ferns, horsetails and club mosses
2. Plants with seeds.
gametophyte - produce sex cells
Types of Seed Plants
1. Gymnosperms
Non-flowering or fruit bearing plants

Produce cones instead of flowers and fruits.

Examples: Conifers and evergreens
2. Angiosperms
Flowering plants

Use flowers (attract animals) and fruits (protect seeds) for reproduction.

Flowering plants provide food for animals.
Seed Structure
Cotyledon - a seed leaf. Provides food for the embryo before it can make its own food.
Types of Angiosperms
1. Monocots
Contains 1 seed leaf (cotyledon)

Flower parts in threes

Leaves with parallel veins

Vascular tissue scattered

Fibrous roots

Examples: grasses, onions, lillies, palms
2. Dicots
Contains 2 seed leaves (cotyledons)

Flower parts in fours or fives

Leaves with branching veins

Vascular tissue in a ring

Taproots

Examples: roses, cactuses, sunflowers, peanuts
Differences between monocots and dicots
Angiosperm Structure
Angiosperms are made up of:
Roots
Stems
Leaves
Flowers
Roots
Main Functions:
Supply plant with water and minerals that are absorbed from the soil
Support and anchor plant
Store food made during photosynthesis
Root Types
1. Tap Root -
One main root growing down with
smaller roots coming off.

Example: carrots
2. Fibrous Root -
Several roots that are the same size.

Example: grass
Stems
Main Functions:
Support plant body

Some stems can store materials.
Example: cactus stores water

Transport materials between roots and leaves

***Xylem - carries water and minerals upward from the roots

***Phloem - carries food downward to roots for storage and to other parts of the plant
Stem Types
1. Herbaceous
Soft, flexible plant
2. Woody
Rigid stems made of wood and bark
Leaves
Main Functions:
Capture sunlight to make food

Control movement of gases in plant.
Parts of the Leaf:
Cuticle - waxy covering that protects against water loss

Chloroplasts - contain chlorophyll to capture sunlight

Veins - Move water, food and nutrients through xylem and phloem

Stomata - openings under the leaf to let in carbon dioxide and give off water and oxygen.

Guard cells - open and close the stomata
Leaf Structure
Stomata
Flowers
Main Functions:
Used for sexual reproduction
Parts of the Flower
Sepal - protects immature flower when it is a bud

Petals - attract insects and animals

Stamen - male reproductive parts

Anther - produces pollen grains

Filament - thin stalk, that anther sits on
Pistil - female reproductive parts

Stigma - collects pollen

Style- pollen travels down to reach egg

Ovary - develops into the fruit

Ovule - inside the ovary; contains the egg.
Develops into a seed after fertilization.
Pollination & Fertilization
1. What type of reproduction occurs in flowering plants?
Sexual reproduction
- egg and sperm are needed
- offspring look different than parents
2. What is pollination?
Pollination occurs when pollen grains are transported from anthers to stigmas.

Self-pollination: egg and sperm from the same plant
Cross-pollination: egg and sperm from different plants
3. What has to happen in order
for fertilization to occur?
The sperm inside the pollen must get from stigma to ovary.

A pollen tube forms from stigma to ovary.
Flower Dissection Lab Directions
Pull off the petals gently. Count the number of petals.

Remove the stamens. Draw and label the parts. Be careful not to remove the stigma and style.

Draw and label the female parts. Remove the stigma and style.

With your fingernail open up the ovary and draw what you see inside.
4. What is fertilization?
Fertilization occurs when the sperm
from the pollen grain fuses (joins)
with the egg inside the ovule.
5. What takes place after fertilization?
The ovule develops into a seed.
The ovary develops into a fruit.
6. What are dormant seeds?
- They are seeds that are inactive (not growing or developing).
7. What does a seed need to grow?
1. water
2. oxygen
3. proper temperature
8. What is germination?
- Germination is the sprouting of a seed.
Asexual Reproduction in Plants
Vegetative propagation:
A root or stem can become a new plant

Examples:
cuttings: using part of stem or root
runners: stems that run along the ground and buds grow off it.
plantlets: tiny plants grow on leaves
Tropisms:
Growth in response to a stimulus
Examples:

phototropism: response to light

gravitropism: response to gravity (geotropism)

hydrotropism: response to water

thigmotropism: response to touch
Photosynthesis
The process by which plants make food using sunlight.
1. What is needed for photosynthesis?
- sunlight: chloroplasts in leaves
- carbon dioxide: stomata in leaves
- water: absorbed by roots
2. What does chlorophyll do?
- chlorophyll absorbs sunlight in the leaves
3. What is the equation for photosynthesis?
sunlight + carbon dioxide + water ----> sugar + oxygen
Sunlight + 6 CO2 + 6 H2O ----> C6H12O6 + 6 O2
Excess sugar travels down phloem to be stored in other areas of the plant.

Oxygen leaves the plant through the stomata of the leaves

Cellular Respiration:
Converts the energy stored in food into a form of energy the plant can use.
glucose + oxygen ----->carbon dioxide + water + energy
C6H12O6 + 6 O2 -----> 6 CO2 + 6 H2O + energy
This process occurs in the mitochondria of both plant and animal cells.
Transpiration:
Water loss from leaves through stomata.
Monocot
Dicot
Monocot
Monocot
Monocot
Monocot
Dicot
Dicot
Dicot
Dicot
1 cotyledon
Parts in 4's & 5’s
Parallel veins
In a ring
Scattered
fibrous
taproot
2 cotyledons
Parts in 3’s
Net veins
stamen
pistil
stigma
style
ovary
pollen
anther
Cross-pollination
Self-pollination
grafting
Plant Responses
Full transcript