Describe autotrophs and heterotrophs.

(N/A) Autotrophs are organisms that can produce their own food using inorganic substances. They are classified into two types:
$1$. Photoautotrophs: These organisms use sunlight as an energy source to synthesize food through photosynthesis (e.g.,green plants,cyanobacteria).
$2$. Chemoautotrophs: These organisms obtain energy by oxidizing inorganic chemical compounds (e.g.,nitrifying bacteria).
Heterotrophs are organisms that cannot produce their own food and depend on other organisms for nutrition. They are classified into:
$1$. Saprophytes: They obtain nutrients from dead and decaying organic matter.
$2$. Parasites: They live on or inside a host organism and derive nutrition from it.
$3$. Holozoic: They ingest solid or liquid food particles (e.g.,animals).