Here are some key traits that distinguish the three domains of life (some of which are from the table on IB chapter 3.2). Consider the tree below showing the relationship of the three domains. Characteristics Nuclear envelope Organelles Peptidoglycan in cell wall Membrane lipids RNA polymerase Ribosome Initiator amino acid for protein synthesis Introns in genes Histones associated with DNA Circular chromosome Operons Plasmids Bacteria Archaea 1 2 LUCA Bacteria No No (rare) Yes Unbranched hydrocarbons Ester linked Version 1 70S Formyl- methionine Very rare No Yes Yes Yes Binary fission Sensitive Reproduction Response to antibiotics streptomycin and chloramphenicol Response to diptheria toxin Think through how you would map all of these characteristics onto this tree. Not sensitive 5 a) Which characters might fall at location 1? No No No Some branched c) Which characters would fall at location 3? Domain Archaea Present in some genes Yes Yes Yes Yes Binary fission Not sensitive hydrocarbons Ether linked Ester linked Version 2 (1 copy) Version 2 (3 copies) 70S 80S Methionine Methionine Sensitive 3 b) Is there another way to map one of these traits on this tree? Yes Yes No Eukarya Eukarya Unbranched hydrocarbons Present in many genes Yes No No No Often sexual Not sensitive Sensitive d) Can you come up with some traits that would fall at location 5 that are not included in the table?

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Chapter4: Cells
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Here are some key traits that distinguish the three domains of life (some of which are from the table on IB
chapter 3.2). Consider the tree below showing the relationship of the three domains.
7
Characteristics
J
Nuclear envelope
Organelles
Peptidoglycan in cell wall
Membrane lipids
RNA polymerase
Ribosome
Initiator amino acid for protein
synthesis
Introns in genes
Histones associated with DNA
Circular chromosome
Operons
Plasmids
Bacterial
Archaea
1
2
Bacteria
LUCA
No
No (rare)
Yes
Unbranched
hydrocarbons
Ester linked
Version 1
70S
Formyl-
methionine
Very rare
Reproduction
Response to antibiotics
streptomycin and chloramphenicol
Response to diptheria toxin
Think through how you would map all of these characteristics onto this tree.
No
Yes
Yes
Yes
Binary fission
Sensitive
Not sensitive
5
a) Which characters might fall at location 1?
No
No
No
Some branched
c) Which characters would fall at location 3?
Domain
Archaea
hydrocarbons.
Ether linked
Version 2 (1 copy)
70S
Methionine
Present in some
genes
Yes
Yes
Yes
Yes
Binary fission
Not sensitive
Sensitive
3
b) Is there another way to map one of these traits on this tree?
Eukarya
Yes
Yes
No
Eukarya
Unbranched
hydrocarbons
Ester linked
Version 2 (3 copies)
80S
Methionine
Present in many
genes
Yes
No
No
No
Often sexual
Not sensitive
Sensitive
d) Can you come up with some traits that would fall at location 5 that are not included in the table?
Transcribed Image Text:Here are some key traits that distinguish the three domains of life (some of which are from the table on IB chapter 3.2). Consider the tree below showing the relationship of the three domains. 7 Characteristics J Nuclear envelope Organelles Peptidoglycan in cell wall Membrane lipids RNA polymerase Ribosome Initiator amino acid for protein synthesis Introns in genes Histones associated with DNA Circular chromosome Operons Plasmids Bacterial Archaea 1 2 Bacteria LUCA No No (rare) Yes Unbranched hydrocarbons Ester linked Version 1 70S Formyl- methionine Very rare Reproduction Response to antibiotics streptomycin and chloramphenicol Response to diptheria toxin Think through how you would map all of these characteristics onto this tree. No Yes Yes Yes Binary fission Sensitive Not sensitive 5 a) Which characters might fall at location 1? No No No Some branched c) Which characters would fall at location 3? Domain Archaea hydrocarbons. Ether linked Version 2 (1 copy) 70S Methionine Present in some genes Yes Yes Yes Yes Binary fission Not sensitive Sensitive 3 b) Is there another way to map one of these traits on this tree? Eukarya Yes Yes No Eukarya Unbranched hydrocarbons Ester linked Version 2 (3 copies) 80S Methionine Present in many genes Yes No No No Often sexual Not sensitive Sensitive d) Can you come up with some traits that would fall at location 5 that are not included in the table?
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Classification: It aids in the identification of living creatures as well as the comprehension of their diversity. It aids in our understanding of different types of plants and animals, as well as their characteristics, commonalities, and distinctions. It allows us to comprehend how complex organisms emerge from smaller organisms.

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