B6: EXTINCTION + CLASSIFICATION

Question 1

What is extinction?

Answer 1

occurs when there are no remaining individuals of a species still alive

Question 2

Why do species become extinct?

Answer 2

-environment changes too quickly (species didn’t have enough time to evolve)
-new competitors
-new diseases
-new predators
-catastrophic event (eg: asteroid collision, volcano eruption)

Question 3

What is classification of living organisms?

Answer 3

sorting organisms into groups

Question 4

Who created the Linnaen system (+when)?

Answer 4

Carl Linnaeus (1700s)

Question 5

What are the levels of classification in the Linnaen system

Answer 5

-Kingdom
-Phylum
-Class
-Order
-Family
-Genus
-Species

Question 6

How many kingdoms are there?

Answer 6

5

Question 7

What are the 5 kingdoms?

Answer 7

-animal
-plant
-prokaryotes
-fungi
-protists

Question 8

Who created the Three-Domain System (+when)?

Answer 8

Carl Woese (1990)

Question 9

What were the 3 groups in the Three-Domain System?

Answer 9

-bacteria (true bacteria such as E-coli)
-archaea (primitive bacteria, usually living in extreme environments like hot springs and slat lakes) (extremophiles)
-eukaryota (animals, plants, fungi, protists)

Question 10

The binomial system

Answer 10

2 part Latin name: genus + species (eg: homo sapien)

Question 11

Which 2 levels of classification from the Linnaen system are used in the binomial system?

Answer 11

genus + species

Question 12

What is an example of the binomial system? (humans)

Answer 12

Homo sapiens