a 3.1 diversity of organisms Flashcards
1
Q
how can organisms differ [5]
A
- anatomy (external features)
- dna
- epigenome
- proteome
- chromosome number
2
Q
what system organises organisms by shared traits
A
binomial system
3
Q
binomial system classification
A
domain
kingdom
phylum
class
order
family
genus
species
4
Q
problem with using external features [2]
A
- convergent evolution- look the same because of adaptations to the environment but underwent different paths of evolution
- biological species concept- species is a group of organisms that can breed and produce fertile offsprings
5
Q
definition of speciation
A
when one species split into two
6
Q
how does speciation take place
A
when the species can be reproductively isolated
- gene pool no longer mixes
- adapt to different environments and evolve
7
Q
cons of the process of speciation [2]
A
- takes a long time
- hard to tell when speciation occurred (have to actually test it)
8
Q
ways to prevent mixing of genes [3]
A
- geographically isolated
- different fertile times
- cant attract mates
9
Q
genome definition
A
all the genetic material in an organisms and can vary in base sequence
10
Q
how to tell if same species using genome
A
variations between genomes of different species are larger than within the same species
