Ecology is the study of..?
Living things in their environment.
Organisms in their unnatural habitats
Plants and the competition they face
An Ecosystem is..?
A community of organisms and their surroundings
The environment in which organisms live and with which they interact
Community of predators only
Acommunity of plants and prokaryotes
The organisms (community) of an ecosystem are called the ____ component & the physical environment is known as the ____ component.
Biotic | Abiotic
Abiotic | Biotic
Abiotic | Antibiotic
Biotic | Antibiotic
A Habitat is..?
The locality in which an organism occurs.
Where the organism is normally found
Where the organism lives
Where the organism has a nest
Where the organism has died
The population is..?
All the living things of the same species in a habitat at any one time
All the living things in a habitat at any one time
All the different species in an ecosystem atr any one time
A community is..?
All the living things in a habitat or ecosystem
The total of all the populations of an ecosystem
Traits of organisms of the same species are..?
A group of individuals with common ancestry
Capable of interbreeding to produce fertile offspring
Incapable of interpbreeding to produce fertile offspring
Capable of interbreeding to produce only infertile offspring
An autotroph is an organism that :
Synthesises its organic molecules from simple inorganic substances
Synthesises its organic molecules from complex inorganic substances
Synthesises its inorganic molecules from simple organic substances
Synthesises it organic substances from simple inorganic molecules
A heterotroph is an organism that :
Obtains organic molecules from other organisms
Organisms that feed on dead plants and animals, and on the waste matter of animals
Organisms that feed on dead plants but not animals or their waste matter
Organisms that synthesise their own organic molecules from simple inorganic substances
Organisms that obtain organic molecules from other organisms
Saprotrophs are known as..?
The trophic level is..?
The level at which an organism feeds in a food chain (it feeding level)
The level at which an organism is consumed in a food chain
The amount of predators an organism has in a food chain
The amount of alternative sources of food an organism has in a food web
The trophic level of producers is level __; for primary consumers it's level __; Secondary consumers are at level __; tertiary consumers sit at level __; and quaternary consumers at level __ .
1 | 2 | 3 | 4 | 5
5 | 4 | 3 | 2 | 1
Food chains tend to be fairly short because :
Energy lost at transfer between trophic levels means few (transfers) can be sustained for long
Energy is lost through death too quickly
There are not enough plants in ecosystems
Gases in the atmosphere that ____ infra red radiation are referred to as green house gases.
The precausionary principle is..?
When an activity raises threats of harm, measures should be taken, even if a cause-and-effect relationship has not been established scientifically.
Better safe than sorry !
Better late than never !
Whe an acivity raises threats of harm, measures shoudn't be taken, unless a cause-and-effect relationship has not been established scientifically.
List the following in chronological order : __ , __ , __ and __ phase.
Lag | Exponential Growth / Log | Linear Growth | Plateu / Stationary
Plateu | Exponential Growth / Log | Linear Growth | Lag
Exponential Growth / Log | Lag | Linear Growth | Plateu
The process of cummulative change in the heritable characteristics of a population.
The occurance of mutations in the ehritable characteristics of a population.
The process of cummulative change in the non-heritable characteristics of a population.
The process of cummulative change in the heritable characteristics of a ecosystem.
Examples of Bryophyta are :
Examples of Filicinophyta :
Examples of Coniferophyta :
Examples of Angiospermophyta :
Examples of Porifera :
Examples Of Cnidaria :
Examples of Platyhelminthes :
Examples of Nematoda :
Examples of Mollusca :
Examples of Anthropoda :
Pyramid of energy shows the flow of energy in a food chain.
Radiant energy from the sun reaches the earth and warms it along with the sea. The earth then radiates infra-red radiation back towards space, however, clouds reflect it back and much is absorbed by gases in the atmosphere. This effect is called the greenhouse effect and is needed to keep the earth warm.
Naturally occurring greenhouse gases include:
As a population increases, environmental resistance occurs i.e space and resources increase, and competition decreases.
Intense cold is an example of a density-independent factor.
Natural selection can essentially be described as 'survival of the fittest'.