FULL Biodiversity Flashcards
All life shares
RNA/DNA, shared biochem, codons for amino acids, membrane bound cell organelles
What is the significance of stromatolites?
provide physical evidence of life
Viruses
Do not have a membrane bound nucleus, lack mitochondria, parasites, lack ATP
How do prokaryotes reproduce
through binary fission
What are archaea characteristics
extremophiles, no nucleus, no organelles, no peptidoglycan, ether linked cell membrane lipids.
What do methanogens produce?
produces methane
What does infolding of the membrane do?
increase surface area, encloses DNA and forms ncleus
Characteristics of mitochondria
has its own DNA, 2 membranes, engulfed by prteobactrium
Characteristics of chloroplasts
has its own DNA, 2 membranes one is its original cyanobacterium
Secondary Endosymbiosis of Green Algae
euglenid chloroplasts
Secondary Endosymbiosis of red algae
stramenopile and alveolate chloroplasts
Tertiary Endosymbiosis of eukaryote with chloroplasts from Secondary endo of red algae
Dinoflagellates
Opisthokonts
fungi, choanoflagellates and animals
Synapomorphy of Opisthokonts
single flagellum of posterior end
Hyphae
allow passage of organic materials and organelles
Absorptivity heterotrophy
secrete enzymes when digest organic materials and nutrients then absorbed into the hyphae, like microspordia
Chyrtids
has flagellated gametes that uses its own water
Arbuscular mycorrhizae
90% of plants
Synapamorphy of Dikarya
dikaryon stage and septate hyphae
Plant Clade synapomorphy
presence of chloroplasts
Glaucophytes
unicellular algae, asexual reproduction
Red Algae
sister group to green plants, no chlorophyll b or starch
Green Plants
have chlorophyll b, store starch which allows to store carbohydrates (increased wavelength of plants)
Green Algae
Paraphyletic lineage that forms a polytomy at the base of the green plant clade
Challenges that plants face
desiccation, physical support, movement of fluids/nutrients, protection of gametes/embryo, increased UV radiation.
Cuticle
land plants wax coating (Prevents water loss), retain and protect embryo
stomata
open and close to allow water and gas exchange
phloem
distributes products of photosynthesis
Xylem
brings water and nutrients from the roots
What does the vascular tissue do?
helps for conduction and support
Alternation of generation in all land plants life cycles
diploid sporophyte produced haploid spores. Haploid gametophyte stage produces haploid gametes. Fuse to make a diploid
Nonvascular
large haploid gametophyte, small diploid sporophyte liverworts and mosses
Vascular
larger diploid sporophyte, haploid gametophyte is small, plants like lycophytes , ferms, gymnosperms, and angiosperms
Liverworts
tend to be low to ground in moist areas- limited water capacity for water transport