19.1 Populations and ecosystems

Question 1

Define ecosystems:

Answer 1

all of the living and non living components of a particular area

Question 2

Define abiotic:

Answer 2

ecological factor that makes up part of the non-biological environment of an organism

Question 3

abiotic examples:

Answer 3

• temperature
• pH
• light intensity

Question 4

define biotic

Answer 4

ecological factor that makes up part of the living environment of an organism

Question 5

biotic examples

Answer 5

• food availability
• predation
• competition
• space

Question 6

define population

Answer 6

a group of individuals of the same species that occupy the same habitat at the same time

Question 7

define habitat

Answer 7

the place where an organism normally lives

Question 8

what is a habitat characterised by

Answer 8

• physical conditions
• the types of other organisms present

Question 9

define species

Answer 9

a group of similar organisms that can breed to produce fertile offspring

Question 10

define community

Answer 10

all the living organisms present in an ecosystem at a given time

Question 11

define niche

Answer 11

how an organisms fits into its environment
- what a species is like
- where it occurs
- how it behaves
- its interactions with other species
- how it responds to its environment