Skip to main content
UploadLanguage (EN)Support
BusinessMobileSocial MediaMarketingTechnologyArt & PhotosCareerDesignEducationPresentations & Public SpeakingGovernment & NonprofitHealthcareInternetLawLeadership & ManagementAutomotiveEngineeringSoftwareRecruiting & HRRetailSalesServicesScienceSmall Business & EntrepreneurshipFoodEnvironmentEconomy & FinanceData & AnalyticsInvestor RelationsSportsSpiritualNews & PoliticsTravelSelf ImprovementReal EstateEntertainment & HumorHealth & MedicineDevices & HardwareLifestyle
Uploaded byamadamba28
PPTX, PDF3,965 views

Plant Diversity Group Project

The document summarizes key aspects of different plant groups: - Bryophytes are the first plants on land and rely on water for reproduction. They help maintain humidity. - Ferns are vascular plants that reproduce via spores. They can absorb heavy metals and nitrogen. - Gymnosperms include conifers and reproduce via wind-dispersed pollen. They provide many ecosystem services. - Angiosperms are flowering plants that come in monocot and dicot varieties and play a vital role in ecosystems by providing food, oxygen, lumber, and medicine.

Education◦
Downloaded 54 times
The Diversity of Plants
Bryophytes  The first plant group above the water line.  Only non-vascular group, lacks upright structure.  Use diffusion of water to hydrate cells.  Depends on damp environment and access to water.  Also requires water for sperm to swim through to eggs.  Unique to bryophytes, the gametophyte is dominant and sporophyte is simple and relatively smaller.
As a Non-Renewable Resource •Plant pioneers out of the water and onto dry land. •Maintain the Earth’s ecosystem’s humidity levels. •As sponges, they maintain humidity over dry periods and prevent rapid run-off and flooding. •Example: The increase of flooding in India can be partly attributed to the loss of bryophytes in the Himalayan forests.
FERNS
Basic Information Ferns usually grow in tropical areas Vascular plants with internal vein structures Reproduce from spores and an intermediate stage called gametophyte
Reproduction  Patches stuck to the pinnae  Patches are where you find the spores  Spores grow inside casings called sporangia  Take a piece of mature fertile fern frond and place it face up so that the spore material is on the underneath of the frond , then leave it overnight, you’re likely to find the next day that the spores have been released as a fine coloured powder  They show up as a fine pattern tracing the form of the fern frond. They can be black, brown, reddish, yellow or even green, but they are extremely small. Each of these spores is capable - through a circuitous process - of growing into an adult fern.
Interesting Facts  There are about 12,000 different types of Ferns  These plants are among the oldest living organisms on the planet; they existed on the planet for nearly 400 million years.  Reproduction of ferns takes place in two morphologically different phases known as sporophyte and gametophyte  Ferns can absorb heavy metals from the air and soil. They can be used to prevent pollution or for the cleaning of already polluted areas  Ferns are able to absorb nitrogen from the air. Because of this feature, some farmers use ferns as natural fertilizers on the rice fields
Gymnosperms  Gymnosperms include conifers (redwoods, sequoias, cedars, junipers, pine trees)  Coniferous forests cover much of Northern Eurasia and North America  Almost 200 million acres of coniferous forests are in national forests  Conifers are the tallest organisms in the world
Gymnosperms  Gymnosperms can reproduce without water due to their pollen, which can be transferred by wind.  Gymnosperms advanced ahead of bryophytes and ferns this way
Gymnosperms  Our ecosystems provide medicinal plants, food, timber, clean air and water, and homes for wildlife  About 1 billion of our population relies on forests  We deforest by doing slash and burn, ranching, excessive logging for timber  The effects are irreversible
Gymnosperms  Forests soak up carbon dioxide  Global warming is worsening due to deforestation  15% of greenhouse gases emissions are already due to deforestation
Angiosperm Basic Information  Angiosperms are vascular plants.  Angiosperms are reproductive plants, producing gametophytes in order to produce an ovule that will later on develop into a seed.  Basic sex organs include: sepals, petals, stamens, anther, carpel, ovary and stigma.
Different Types of Angiosperms Monocots  Have only one seed leaf, and include veins in the leaves, flower parts are in multiples of 3 and there are scattered vascular bundles within the plant  Examples: corn, grass, palm trees Dicots  Have two seed leaves, netlike vein patterns in leaves, flower parts are in multiples of 4 or 5 and vascular bundles are in distinct rings within the plant  Examples: roses, sunflowers, cacti, and apple and cherry trees
Monocots vs. Dicots
Angiosperms Importance to the Ecosystem  Angiosperms are the primary food source for animals.  They provide us with oxygen for us to breathe.  The provide lumber for buildings and other objects.  They are the basis for many drugs.