digestion definitions Flashcards
1
Q
what is an autotroph
A
- they use simple inorganic materials to manufacture complex organic compounds
2
Q
what is a photoautotroph
A
- use light energy to convert simple inorganic molecules into complex ones
3
Q
what is a chemoautotroph
A
- use energy derived from oxidation to convert simple inorganic compounds into complex ones
4
Q
what is a heterotroph
A
- they consume complex organic food material
5
Q
what is holozoic
A
- includes nearly all animals
- take food into their body to digest it, and they have a specialised digestive system
6
Q
what are saprophytes
A
- feed on dead or decaying matter and do not have a specialised digestive system
- they secrete enzymes on the food outside of their bodies to digest it
7
Q
what is a parasite
A
- an organism that feeds on another organism
- they live on or in the host
- highly specialised and and show adaptations to their environment
