4.5: Species and Taxonomy Flashcards
Biodiveristy
The number of species and the number of individuals of each different species within any community
Species richness
The number of different species in a community
Community
All the individuals of all the species living together in the same area at the same time
Species
Groups of similar organisms that reproduce to produce fertile offspring
Genetic diversity
Difference in DNA
Niche
An organisms role in the community. Describes what a species is like, where it occurs, how it behaves. how it interacts with other species. No two species occupy the same niche due to interspecific competition
Habitat
A place where an organism normally lives within an ecosystem
What information is needed to calculate an index of diversity for a community?
- Number of species
- Number of individuals in each species
Suggest economic arguments for maintaining biodiversity (4)
- medical uses
- tourism
- agriculture
- saving local forest communities
Explain how farming causes the diversity of animals to decrease. (5)
- lower diversity of plants
- fewer sources
- fewer habitats
- fewer herbivores so fewer carnivores
- agriculture
Hierarchy
System of ranking which small groups are nested components of larger groups. No overlap
What groups are domain split into
- bacteria
- archaea
- eukarya
What is the eukarya domain split into
- protista
- fungi
- Animalia
- plantae
What is the hierarchy in order?
- domain
- Kingdom
- Phylum
- Class
- Order
- Family
- Genus
- Species
How does courtship increase the probability of successful mating? (5)
- Attracts same species
- Attracts opposite sex
- Indication of sexual maturity
- Stimulates release of gametes
- Form pair bond
