Evolution- Bacteria To Brains

Question 1

Examples of evidence for a single tree of life

Answer 1

-DNA as a genetic material
-three letter genetic code
-lipoprotein cell envelope
20 core amino acids in proteins
-ribosome for translation
-RNA polymerase proteins

Question 2

Examples of evidence for a single tree of life

Answer 2

-DNA as a genetic material
-three letter genetic code
-lipoprotein cell envelope
20 core amino acids in proteins
-ribosome for translation
-RNA polymerase proteins

Question 3

Define universal homology

Answer 3

All life on earth is related

Question 4

What is LUCA and when did it live

Answer 4

Last Universal Common Ancestor
-3.5-3.8 billion years ago

Question 5

Define metagenomics

Answer 5

A ‘sequence everything’ approach (mixture of species/genes)
Extract all DNA from habitats and sequence everything

Question 6

What is a Protozoa

Answer 6

Protist (eukaryotic algae) which isn’t photosynthetic

Question 7

Define protists

Answer 7

Eukaryotic algae (photosynthetic)

Question 8

Outline last eukaryotic common ancestor (LECA)

Answer 8

Ancestor to all eukaryotes that live today; existed 2 billion years ago, soon after the great oxidation event

Question 9

Outline homo erectus

Answer 9

-2 mil years ago until at least 250,000 years ago
-bigger brain
-first human relatives to migrate out of Africa

Question 10

Outline Homo sapiens

Answer 10

-from Africa 300,000-200,000 years ago