Test 2 Struggles Flashcards
What are Eubacteria and Archaebacteria? (hint: one is real one is dead)
Eubacteria are called true bacteria, they have higher degrees of organization. Archaebacteria are called living fossils and they can survive in extremely harsh (highly acidic, high temperature, methanogenic) environments.
What characteristics do all prokaryotes share? (6)
(Remember who are prokaryotes?)
Prokaryotes: Eubacteria and Archaebactia
1. All are unicellular
2. All have circular DNA
3. All lack membrane-bound organelles
4. All are very small
5. All have cell wall
6. All reproduce asexually
Name 4 ways Archaea and Bacteria differ.
(think from inside —> outside)
- Archaea not disease causing in humans
- Archaea cell walls lack peptidoglycan
- Archaea have unique cell membrane
- Archaea unique DNA structure
Name 3 types of Archaeabacteria.
(remember: who are they? ARCHAEA)
- halophile: high salt concentration
- methanogen: anaerobic environment
- thermoacidophile: hydrothermal vents
What is an endospore?
Non-reproductive structure of bacteria that allows for survival under harsh conditions.
What is a protist?
A non-animal, non-plant, non-fungi eukaryote.
Ecological significance of bacteria (3)
How do they interact with the world?
- Decomposers
- Pathogens
- Mutualistic symbionts
What -phyletic group do Protists belong to?
Paraphyletic: coming from same ancestor but not including all descendants.
Monophyletic group: X ancestors, X descendants
Polyphyletic group: X ancestors, X descendants
Paraphyletic group: X ancestor, X descendants.
Monophyletic group: 1 ancestor, all descendants
Polyphyletic group: No common ancestor ancestor, some descendants
Paraphyletic group: 1 ancestor, some descendants.
What are the three categories of protists? Give an example of each.(you already know them all outside of the course)
Plant-like(amoeba), Animal-Like(algae), Fungi-like(mold)
Name the 2 vascular tissues in plants and their functions.
Xylem: water transport
Phloem: food transport
What did seedless vascular plants do during the carboniferous period? How did these turn into coal deposits? Now, when we burn fossil fuels, what is released into the atmosphere?
- Massive growth of these plants
- Dead plant matter+time+pressure=coal
- CO2 released
What happens during Anaphase II?
Separation of sister chromatids.
Approx when did life on earth begin?
3.5
When did earth form?
4.6 B years ago