4.1 Species, communities and ecosystems Flashcards

1
Q

species

A

groups of organisms that can potentially interbreed to produce fertile offspring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

populations

A

a group of organisms of the same species who live in the same area at the same time.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

autotrophs

A

organisms make their own carbon compounds from carbon dioxide and other simple substances

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

heterotrophs

A

some organisms obtain their carbon compounds from other

organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

trends in plant and algae nutrition

A

Almost all plants and algae are autotrophic – they make their own complex organic compounds using carbon dioxide and other simple
substances. A supply of energy is needed to do this, which plants and
algae obtain by absorbing light. Their method of autotrophic nutrition
is therefore photosynthesis and they carry it out in chloroplasts.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

parasitic

A

plants or algae that do not contain chloroplasts and they do not carry out photosynthesis.
These species grow on other plants, obtain carbon compounds from
them and cause them harm. They are therefore parasitic.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

consumers

A

heterotrophs that feed on living organisms by ingestion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

detritivores

A

heterotrophs that obtain

organic nutrients from detritus by internal digestion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

saprotrophs

A

heterotrophs that obtain

organic nutrients from dead organic matter by external digestion.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

communities

A

formed by populations of different species living together and interacting with each other.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

ecosystems

A

A community forms an ecosystem by its interactions with the abiotic environment.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

inorganic nutrients

A

Autotrophs and heterotrophs obtain inorganic nutrients from the abiotic environment.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

what chemical elements are needed for living organisms?

A

carbon, hydrogen and oxygen
nitrogen and phosphorus
and fifteen others

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

nutrient cycles

A

chemical elements can be recycled - Organisms absorb the elements that they require as inorganic nutrients from the abiotic environment, use them and then return them to the environment with the atoms unchanged.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

requirements for sustainability of ecosystems

A

nutrient availability
detoxification of waste products
energy availability.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly