How Plants Colonised Land Flashcards
(12 cards)
During what period did seedless vascular plants form extensive forests of tall trees?
Carboniferous
In what time period did colonisation of land by plants first occur?
The Ordovician period
Which is a key difference between alternation of generations in plants and sexual reproduction in non-plant organisms?
In plants, the haploid and diploid stages are both multicellular.
In what way do megasporangia differ from microsporangia?
Megasporangia produce spores that develop into female gametophytes, whereas microsporangia produce spores that develop into male gametophytes.
The development of the __________ prevents plants from drying out and protects them from microbes
Cuticle
Dessication
Removal of moisture (drought)
What do the antheridia of mosses produce?
Sperm
The tissue called phloem has what function in vascular plants?
Distribution of sugars, amino acids, and other organic products
Evidence suggests that land plants arose from within which protist lineage?
Charophytes
How is water primarily brought into mosses?
diffusion through all cells
What characteristics of Sphagnum peatlands is responsible for their ability to inhibit decomposition?
- Low temperature
- Low oxygen
- Low pH
- Phenolic compounds produced by Sphagnum
How are gametes produced by bryophytes?
By mitosis of gametophyte cells
