Biology Test 10 Lecture 2 Flashcards
What is one common characteristic all protists share (ie why are they grouped into this kingdom)?
None had a mitochondria
Which statement describes a difference between bacteria and early eukaryotes (such as the amoeboid Pelomyxa palustris)?
Early eukaryotes were bigger than the bacteria
Which statement describes (internally and metabolically) the first hypothesized eukaryotic organism? (look to all the information we discussed on Pelomyxa palustris)
- Small size
- No mitochondria
- Had bacteria living inside them that helped with getting energy
- Thought to have arose from non-photosynthetic organisms
According to the video How Did Cells Evolve into Multicellular Organisms, how long ago did life show up on earth? How long ago did unicellular organisms start “sticking together?”
According to the video How Did Cells Evolve into Multicellular Organisms, why are living organisms limited by size (why can your cells only grow to a certain size)?
According to the video How Did Cells Evolve into Multicellular Organisms, what is the advantage of being multicellular compared to unicellular?
According to the video How Did Cells Evolve into Multicellular Organisms, is humans have a trillion cells in their bodies, why do we only use an egg and sperm to reproduce?
Which statement accurately describes the theory of endosymbiosis?
- Aerobic bacteria became mitochondria
- Symbiotic aerobic bacteria became mitochondria when engulfed by ancestral eukaryotic
- Nonsulfer purple bacteria most similar to mitochondria, could carry out oxidative metabolism
- Mitochondria believed to be derived from endoplasmic reticulum of host cells
How are purple nonsulfur bacteria and mitochondria of eukaryotes similar? (know the information we discussed on slide four)
One of the main questions the scientific community had regarding the endosymbiosis theory is how did the mitochondrial genes transfer over time if all these organisms originally did was eat these bacteria?
How are most bacteria and mitochondria similar? (know the information we discussed on slide five)
Why are chloroplast also theorized to originally be bacteria which were incorporated into certain plant and algae eukaryotes?
Why are centrioles also theorized to originally be bacteria which were incorporated into animal eukaryotic cells?
Which statement describes the cell surface of some protists?
Which statement does not describe a type of locomotor organelles used by protists?
