ecosystem Flashcards
(19 cards)
Definition of nutrition
a way for an organism to obtain nutrients and energy from the food for its life proocesses
Two types of nutrition
Autotrophic nutrition and Heterotrophic nutrition
Definition of autotrophic nutrition
nutrition organism synthesise own food
Definition of heterotrophic nutrition
nutrition organism obtain food from the surrounding
Two types of autotrophic
Photoautotrophic and Chemoautotrophic
Three types of heterotrophic
Saprotrophic, Holozoic and Parasitic
Definition of photoautotrophic nutrition
nutrition where photoautotrophs synthesise complex organic compounds from CO2 with light energy
About photoautotrophs
synthesise own food via photosynthesis
Example of photoautotrophs
Green plants
Definition of chemoautotrophic
nutrition chemoautotroph synthesise organic compounds without using light
About chemoautotroph
Organism that gain energy from oxidation of inorganic substances such as hydrogen sulphide and ammonia thru chemosynthesis
Example of chemoautotroph
nitrobacter
Definition of saprotrophic
nutrition where saprotrophs gain nutrients from dead and decaying organic substances
About saprotrophic
digestion occurs outside body, before nutrients are absorbed
Example of saprotroph
Fungi
Definition of holozoic
the organism survives by eating solid organic substances, then digested and absorbed into the body
Example of holozoic
Human and most animals
Definition of parasitic
nutrition organism absorb nutrients from the host
Example of parasites
fleas and tapeworms get nutrients from human hosts
