Plant Diversity Flashcards
What are the major groups of plants
Bryophytes
Ptereophytes
Gymnosperms
Angiosperms
What are taxonomists
People who classify organisms
What are the different types of vascular plants
Pterophytes
Angiosperms
Gymnosperms
What are pterophytes
Seedless plants
An example of a pterophyte
Ferns
Seed bearing plants
Gymnosperms and angiosperms
What are Gymnosperms
Cone bearing plans
Examples of Gymnosperms
Conifers and yellow woods
What are Angiosperms
Flowering plants
Non vascular plants
Have rhizoids to anchor plants
No Xylem so can’t grow tall
Homosporous
No cuticle
Water for fertilisation
Examples of Bryophytes
Mosses and Liveworts
Vascular plants
Have cuticle and stomata
Xylem and phloem transport water and mineral
Seeds for reproduction
Gametophyte
Haploid
Dominant generation
Photosynthetic
Sporophyte
Diploid
Produces haploid spores by meiosis
Seedless plants
Heterosporous
Lower vascular plants
Reproduce by spore bearing leaves
Motile male gametes
Thin cuticle and stomata
Roots grow out of rhizomw
Independent sporophyte
Seed bearing plants
Homosporous
Higher vascular plants
Reproduce by seeds
Resistant seeds
Pollen grains produced from microspores
Cone bearing plants
Needle like leaves
Single vein
Male cone has pollen sacks which bursts to reach megasporangium
Flowering plants
Flower attracts pollinators to stigma
Remain genetically strong as self pollination is avoided
What will happen if there’s no pollination
No fertlisation
No production of fruit & seed crops
Natural ecosystems collapse
Animals die
Classes of flowering plants
Monocotyledons
Dicotyledons
Monocots
Single seed leaf
Narrow leaves
Parallel veins
x3 flower parts
Not separated into sepals & petals
Scattered vascular bundles
No secondary thickening
Fibrous leaves
Wind pollinated
Dicots
Two seed leaves
Broad leaves
Network of veins
x4/5 flower parts
Has Sepals and petals
Ring vascular bundles
Secondly thickening
Tap root
Insect pollinated
What does the stamen have
Anther and Filament
What is the Anther
Where pollen is formed
What does the Carpel have
Stigma
Style
Ovary
Ovule
What happens to the ovary and the ovule
Ovary- mature into fruit
Ovule- forms seed after fertilisation
What is the receptacle
The part that supports floral parts
What does the Perianth contain
Corolla
Calyx
Corolla
Petals
Calyx
Sepals