Unit A | Topic 1-2 | Biodiversity, Characterizations of living things, Niches Flashcards
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Definition of:
Biodiversity
The number and variety of organisms
3 things biodiversity depends on:
- Ecosystem
- Species
- Genetics
What is the most biodiverse regions on earth?
Rain forests
(i.e: Amazon rain forest)
Definition of:
Keystone species
A species that other organisms depend on for survival
(i.e: coral is a keystone species because fish depend on it for protection)
What are the characterizations (NOT classifications) of living things?
- Everything needs energy
- Everything grows
- Everything reproduces
- Everything has DNA
- Everything has cells
- Everything has organization
- Everything responds to stimuli
Everything, living or non-living, is divided into two groups, what are these groups?
- Abiotic
non-living - Biotic
living
What are the ecological levels of organization?
- Individual (individual)
- Population (species)
- Community (different species)
- Ecosystem (antibiotic)
What are the classifications of living things that is used to determine what the specific organism is?
- Kingdom
- Phylum
- Class
- Order
- Family
- Genus
- Species
What two classifications are used to determine an organisms scientific name?
Genus - Species
Definition of:
Structural adaptation
A physical characteristic that allows the organism to survive
Definition of:
Behavioral adaptation
A behavioral characteristic that allows the organism to survive
Definition of:
Species
Living things that have the same structures and can reproduce with one another
What is the value of variation?
- Resistance to diseases
- Biodiversity
- Ability to survive, adapt, and overcome challenges
Definition of:
Interdependence
Each species relies on other species in its environment.
Types of symbiosis:
- Parasitism
- Commensalism
- Mutualism
Definition of:
Parasitism
One organism benefits,
One organism suffers.
(+/-)
Definition of:
Commensalism
One organism benefits,
One organism isn’t affected.
(+/=)
Definition of:
Mutualism
Both organisms benefit.
(+/+)
Definition of:
Niche
The role that an organism plays in its environment
What does a niche of an organism include?
- Its habitat
- What it eats
- What eats it
- How it interacts with the environment
- How it interacts with other species
- How it reproduces
Definition of:
Broad Niche
Organisms that can live in many environments
(i.e: Generalists)
Definition of:
Narrow Niche
Organisms that can’t live in many environments
(i.e: Specialists)
Definition of:
Resource partitioning
Dividing resources between species
