Biodiversity And Classification

Question 0

Where did diversity come from?

Answer 0

• theory that life branches off from common ancestors has existed for 250 years. However, Darwin proposed a credible mechanism for evolution in 1859
• excess offspring are produced and species learn to compete and adapt which slowly changes the ways of the animal

Question 1

Why study biology?

Answer 1

• 2 million species named, 5-100 million exist

* originally need plant/animal/land knowledge for survival

Question 2

Who created Archaea, eubacteria, and eukarya?

Answer 2

Daniel Woese

Question 3

What are modern challenges?

Answer 3

• bacteria can acquire foreign DNA from other bacteria in odd sexual exchanges
• it is possible for bacteria to mix and match genetic programs developed in completely different organisms
• some argue it’s impossible to form an evolutionary bacterial clade and species should not be used when discussing bacteria

Question 4

Where are prokaryotic cells found?

Answer 4

Eubacteria and archaea

Question 5

What MUST a prokaryote cell have?

Answer 5

Bacterial chromosome, cell membrane, ribosomes, cell wall

Question 6

What are optional prokaryote equipment

Answer 6

Polis, bacterial flagellum, plasmid, capsule, mesosome, thylakoids

Question 7

What do pilus do?

Answer 7

Used to latch into other cells to exchange resources or mate

Question 8

What do bacterial chromosome do?

Answer 8

Contain DNA

Question 9

What do ribosomes do?

Answer 9

Contain RNA and protein, enclosed in assembly of proteins

Question 10

What do capsules do?

Answer 10

The mucopolysaccharide later around the cell wall

Question 11

What do mesosome do?

Answer 11

A folding of the bacteria cell membrane that is the site of respiration

Question 12

What do thylakoids do?

Answer 12

Contain chloroplasts