Classification and biodiversity Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

Distinguish between homologous and analogous structures and explain why analogous features are no considered evidence of common ancestry (3)

A
  • analogous structures are different structures to perform a similar function
  • homologous structures similar structure performing different functions
  • analogous structures arise through convergent evolution
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

State the diagram usually shown to show common ancestry (1)

A

phylogenetic tree

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Modern taxonomic classification combine cetacea and artiodactyle into a single order. Explain how this illustrates the tentative nature of biological classification (2)

A
  • classification may change
  • a more information becomes available
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

State the environmentaal factor most likely to explain the distribtuion in marine mammal species (1)

A

temperature

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Explain why a curve shows bimodial distribution (1)

A

two peaks

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Describe a disease caused by prokaryota, protoctista and fungi (3)

A
  • pokaryota - salmonella
  • protoctista - malaria
  • fungi - athletes foot/ringworm/thrush
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the term used to describe the variation in number of species in different places (1)

A

biodiversity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Identify two habitats where you would expect to find a high number of species (2)

A
  • rain forest
  • coral reef
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Suggest why there is a decrease in number of species of thi type of butterfly in region covered by sahara deserts (2)

A
  • very little water
  • a low vareity of food
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

State why these two human forms might be classified as seperate species despite having many common features (2)

A
  • not able to interbreed
  • to produce fertile offspring
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Name a biological technique to prove that two species are different (1)

A
  • DNA hybridisation
  • genetic or DNA fingerprinting
  • electrophoresis
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

State one characteristic common to all vertebrates (1)

A
  • possess a backbone / spine / internal skeleton / brain with cranium
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Explain how result of DNA profiling tests could have been used to determine that these two species were closely related (1)

A
  • they would have more bands in common compared to other species
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Define the term species (2)

A
  • a group of organisms that can interbreed
  • produce fertile offspring
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Decribe two major features of eukaryote which would allow you to distinguish from a prokaryote (1)

A
  • have nucleus
  • membrane bound organelle
  • 80s riboome
  • DNA associated in chromosomes
How well did you know this?
1
Not at all
2
3
4
5
Perfectly