Midterm Flashcards
What is the classification system in order?
Domain
Kingdom
Phylum (division)
Class
Order
Family
Genus
Species
What are the 3 domains?
Eukarya, Bacteria, Archaea
What are the 4 characteristics that define a prokaryote?
DNA not organized in a nucleus
DNA is circular
Lack of membrane bound organelles
Most cell walls contain peptidoglycan
What are the 3 main prokarya cell shapes? And what do they look like?
Coccus (spherical)
Bacillus (rod shaped)
Spirillum (Spiral)
How can you tell if an organism is a cyanobacteria?
Unicellular and generally in a colony
Have chlorophyll but no plastids
Reproduce by binary fission
They are autotrophic
How can you tell the difference between bacteria and cyanobacteria?
Bacteria are unicellular and not in a colony like cyanobacteria, and bacteria is heterotrophic and cyanobacteria are autotrophic
How do you define gleocapsa?
found in colonies surrounded by individual sheaths
How do you define Microcystis?
Found in large colonies with one common sheath and is an indicator for polluted water
How do you define Oscillatoria?
Disk shaped cells which glide back and forth (look like scratches
How do you define spirulina?
Spiral shaped used for herbal medicine and high protein foods
How do you define anabaena?
It is coccus shaped and forms long strands with no sheath
What are the 3 types of cells in anabaena?
Typical anabaena
heterocysts
Akinetes
What are their functions? (typical anabaena, heterocysts, akinetes)
Typical anabaena (just nothing kinda chillin)
Heterocysts (nitrogen fixation)
Akinetes (house spores)
What is the difference between obligate anaerobes and facultative anaerobes?
Obligate (CAN survive and multiply without oxygen)
Facultative anaerobes (CAN survive without oxygen BUT do better WITH oxygen)
What are the 3 Domains
Bacteria
Archaea
Eukarya
What conditions can Obligate anaerobes only survive in?
Can only survive and multiply in the absence of free oxygen
What conditions Facultative anaerobes only survive?
Can survive without oxygen but grow better with oxygen
What are the 3 sexual life cycles?
Zygotic
Gametic
Sporic
Define the zygotic sexual life cycle and what organism typically uses this life cycle
cells are haploid, two cells fuse to fertilize and form gamete which divides to form four haploid cells (spores) (Fungus and most algae)
Define the gametic sexual life cycle and what organism typically uses this life cycle
cells are diploid, some go through meiosis to produce haploid gametes (Some algae)
Define the sporic sexual life cycle and what organism typically uses this life cycle
(alternation of generations) - alternates between diploid and haploid cells (Plants)
what is the fungi kingdom suffix?
mycota
What is the protista kingdom suffix?
phyta
What are some Fungi Characteristics?
-All are heterotrophic
*Parasites (feed on living matter) *Saprobes (feed on non-living matter)
-Chitin Cell Walls -Absorptive Nutrition -Important Decomposers -Most use spores to reproduce
What are some protista characteristics?
*Eukaryotes *Simple/primitive, yet very adaptable *Can be heterotrophic and/or autotrophic *Asexual and Sexual reproduction present *Do not have a Sterile Jacket
How do you define Zygomycota?
-reproduce asexually by sporangia and sexually by zygospores (bread molds
How do you define Ascomycota?
-sexually reproduce with a fruiting body that contains asci which contain 8 ascospores (Sac fungi, yeasts, Penicillium)
How do you define Basidiomycota?
-Reproduce using basidioma (basiocarp) which form basidia and basidiospores (mushrooms, toadstools)
How do you define Deuteromycota?
(Fungi
Imperfecta)- Do not fit into the established taxonomic classifications. Only their asexual form of reproduction is known.
How do you define Euglenophyta?
Euglenoids
-Use pellicle for structure instead of cell wall, most are
autotrophic
How do you define Pyrrophyta?
Dinoflagellates - red tides correlates with farm and urban pollution
How do you define Chrysophyta?
-Golden-brown algae, diatoms
*Diatoms have silica cell walls which overlap
How do you define Phaeophyta?
-Brown Algae such as kelp
-Specializations
*Holdfast, stipe, blade
How do you define Rhodophyta?
-Red Algae
*Agar
How do you define Lichens?
Symbiotic relationship between a cyanobacterium (blue-green algae) or chlorophyta (green algae)
and a fungus (often ascomycete)
How do you define Chlorophyta?
-Green Algae such as
*Volvox
*Ulva (sea lettuce)
*Spirogyra