Flashcards in Lecture 3 part 2 Plant diversity lower land plants Deck (87)
How are green land plants defined?
Cell structure & biochemistry
–Degree of vegetative complexity
–Type of life cycle
–Degree of complexity of their reproductive structures
What is the basic cell structure?
What are the Chloroplast pgiments?
mainly chlorophylls & some carotenoids
What is the cell wall made out of?
made of cellulose
What is the typical storage material?
What kind of flagella do Motile cells (Male gametes) have?
What growing points define Growth
–Continue to divide indefinitely
–Plant body differentiates from the maturing daughter cells as the meristem grows away
Plant body shows differentiation into?
leaves & stems
What do some plant bodies lack?
Some lack this & body is flat & lobed
What does Elongated outgrowths increase?
the surface area in contact with the substrate (root hairs or rhizoids)
What phases do plants alternate between?
What is Haploid phase?
single set of chromosomes
What is diploid phase?
each nucleus contains 2 complete sets of chromosomes
What is the process that leads to the plant phase alternation?
fusion of gametes and meiosis.
What are gametes?
haploid unicellular reproductive bodies which fuse in pairs to form a diploid cell called a zygote
In most simple algae the vegetative plant is?
in most simple Algae the Zygote is?
For most animals the organism's chromosomes are?
diploid & the gametes are haploid
What types of organism have an alternation of generations?
In advanced algae & all land plants
What are both haploid and diploid phases represented by?
distinctive vegetative organisms
What are the two distinct types of plants species consist of?
one haploid & one diploid
What is the order of the plant life cycle?
Haploid phase (Gametophyte) -> Fusion of gametes -> Diploid phase (sporophyte) -> Meiosis. Then back to Haploid phase
What is the order of the generalised life cycle of lower male land plants?
Multicellular vegetative haploid plant (gametophyte) -> Male sex organ(gametangium) -> antherozoids -> FUSION -> Zygote -> Multicellular vegetative diploid plant(sporophyte) -> Sporangium -> MEIOSIS -> SPORES
What is the order of the generalised life cycle of lower female land plants?
Multicellular vegetative haploid plant (gametophyte) -> Female sex organ (gametangium) -> egg -> FUSION -> Zygote -> Multicellular vegetative diploid plant(sporophyte) -> Sporangium -> MEIOSIS -> SPORES
How do haploid plants give rise to the diploid?
producing gametes–Called a gametophyte
These fuse in pairs to form a?
What does a zygote grow to form?
a diploid plant
What are the 2 kinds of gametes in all land plants?
–Male (small & motile)
–Female (large & non-motile)
What are the structure which give rise to gametes?