Lab 1

Question 1

What is the study of phylogenetics?

Answer 1

study of relationships of different groups over time

Question 2

what are the 3 domains of life?

Answer 2

bacteria, archaea (prokaryotes)
eukaryotes

Question 3

what is the domain archaea and bacterial also called and used for?

Answer 3

archaea: extremophiles
bacteria: decomposers; recycle nitrogen, phosphorus, and sulfur; nutrient cycling; energy flow
- also used in PCR as Taq polymerase

Question 4

what is the cycle of endospores?

Answer 4

cells that can be dormant during very harsh conditions
- vegetative cell -> formation of endospore -> vegetative cell dies -> free endospore -> germination

Question 5

what is difference between gram positive and negative?

Answer 5

positive: stain purple b/c of thick peptidoglycan layer
negative: stain pink b/c of thin/no peptidoglycan layer

Question 6

what do all prokaryotes have?

Answer 6

cell wall of peptidoglycan, ribosomes, nucleoid region
- lack nuclei and membrane-bound organelles