classification

Question 1

species

Answer 1

a species is a basic unit of classification which is capable of breeding to produce offspring

Question 2

the bionomal system

Answer 2

species have two named derived from latin
the first name is the generic name and the second is the specific
generic- denotes to the genus
specific- denotes to the species

Question 3

how does courtship behaviour help achieve max chance of breeding and survival

Answer 3

• enables individuals to recognise members of their own species to ensure that mating only takes plavce between member of the same species and offspring can be maximised
  -identify a mate capable of breeding, needs to be fertile and mature
  -form a pair bond capable of breeding
  -syncronise mating max possibility taht sperm will fuse with egg

Question 4

courtship behaviour

Answer 4

chain of actions between two members of same species male and female to indicate they are ready to mate

Question 5

biological classsification 1- artificial classification

Answer 5

catagorising and dividing species in terms of their analogus characteristics (same function but not the same evolutionary origins) eg having wings (birds and butterflies both use these for flight but originated in different ways)

Question 6

biological classification 2- phylogenetic classification

Answer 6

based on evolutionary relationships between organisms
classified into groups depending on shared features derived from ancestors
arranged into a hierarchy

Question 7

what is taxonomy

Answer 7

study of phylogenetic groups and their positions in a hierarchical order

Question 8

domain

Answer 8

highest taxonomy rank- includes Archea, bacteria and eukarya

Question 9

bacteria

Answer 9

• single celled prokaryotics
• absence of membrane bound organelles like nuclei
  -ribosomes smaller than eukaryotes
  -single loop of dna with no histones

Question 10

archea

Answer 10

-single celled prokaryotes
- genes and protein synthesis more similar to eukaryotes than bacteria

Question 11

eukarya

Answer 11

• posses membrane bound organelles
  -contain phospholipid bilayer membranes
  -ribosomes larger

Question 12

difficulty of defining species

Answer 12

• species are not fixed they change overtime and a new species may develop due to the evolution of a pre-existing one
  -within the same species there can be a large amount of variation between members of the species eg breeds in dogs as artificial selection can take place
• some rarely reproduce sexually
  -some populations are naturally separated and may be classified as two different species when they are one