Plants - PowerPoint PPT Presentation

Plants l.jpg
Download
1 / 13

Plants. Read pg 398-420, 470-489 HW 418 #1-18 HW 492 #1-20, 26 Fruit homework (you’ll see). Characteristics. Most plants are green due to their chlorophyll. All contain cell walls made of cellulose. Plants are autotrophic, producing their own energy from sunlight. 2 major categories:

I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.

Download Presentation

Plants

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Plants l.jpg

Plants

Read pg 398-420, 470-489

HW 418 #1-18

HW 492 #1-20, 26

Fruit homework (you’ll see)


Characteristics l.jpg

Characteristics

  • Most plants are green due to their chlorophyll.

  • All contain cell walls made of cellulose.

  • Plants are autotrophic, producing their own energy from sunlight.

  • 2 major categories:

    • Gymnosperms: early seed plants, flowerless

    • Angiosperms: flowering plants


Reviewing cell anatomy l.jpg

Reviewing cell anatomy

  • Unique parts:

    • Cellulose cell wall

    • Large vacuole

    • chloroplasts


Evolution l.jpg

Evolution

  • BryophytesSeedless vascular plantsgymnospermsangiosperms

    • Bryophytes are small leafy or flat plants that are evolutionarily the transition between green algae to vascular plants

      • Ex: some mosses

    • Seedless vascular plants are mainly roots & shoots

      • Ex: Ferns

    • Gymnosperms produce seeds

      • Ex: Conifer trees (pine trees)


Gross anatomy l.jpg

Gross Anatomy

  • Major tissues in plants:

    • Roots, stems, leaves, and sometimes flowers

    • Xylem and phloem

      • Xylem transports water along a plant stem

      • Phloem transports foods/nutrients

    • Stoma

      • Specialized cells in leaves that open and close to allow gas exchange.


Shoots roots l.jpg

Shoots & Roots

  • Roots

    • Anchor

    • Uptake water and minerals/nutrients

    • 2 types: Tap roots, fibrous roots

  • Stems

    • Where shoots and buds arise from. Lateral and vertical expansion of the plant.

    • Provides support and transfers uptake from roots to the rest of the plant.

  • Leaves

    • Main food production. Broad structures capture sunlight.

    • Often waxy to prevent water loss.

    • Flowers are considered specialized shoots.


Seeds l.jpg

Seeds

  • What is a seed?

    • A seed is a mature ovule containing an embryo.

  • Gymnosperm means “naked seed” and these are the first plants to produce seeds evolutionarily.

  • Pollination is the transference of a male gametophyte (pollen) to a female gametophyte (ovule) and fertilization results in a seed.


Flowering plants l.jpg

Flowering plants

  • Angiosperms belong to the phylum Anthophyta.

  • Split into two major categories: monocots and eudicots.

  • Fruits and seeds use a variety of dispersion methods:

    • Animals

    • Water

    • wind


Monocot vs dicot l.jpg

Monocot vs Dicot

  • Monocots are plants with one cotyledon (or seed-leaf), triplet flowers, and parallel veins.

    • Good examples of monocots are:

      • Grasses

      • True grains (rice, wheat, corn)

      • Palm trees, banana trees

      • Onion family (onion and garlic

  • Eudicots are plants with 2 (di=two) cotyledons, flowers in multiples of 4/5, and branched veins.

    • Most other flowering plants are eudicots.


2 phase life cycle l.jpg

2 phase life cycle

  • All plants undergo an alternation of generations.

    • A switch from diploid (2n) generation to haploid (n) generation where structures differ.


Life spans l.jpg

Life Spans

  • Another way to classify plants is the length of time they live:

    • Annuals: Plants that live and die in one year or growing season. Most vegetables and flowers are annuals.

    • Biennials: These plants complete a lifecycle in 2 years. Carrots, beats, and some flowers are biennials.

    • Perennials: These plants continue to grow year after year. Trees are good examples of perennial plants.


Fruits l.jpg

Fruits!

  • 1. apples,2. oranges,3. peaches,4. bananas,5. berries - i.e. strawberries, raspberries, blueberries, etc.6. pears7. any fruit not listedextras -kiwis, cantaloupes, melons, papayas, pineapples, red/green peppers, avocados


Slide13 l.jpg

  • Other things:

    • Plant defense

    • Special structures (thorns etc)

    • Hormones

    • Flower structure

    • Plant diversity

    • Fruit

    • Agriculture/human benefits


  • Login