Fill in the blanks.
1. Living things in the environment are ……………. factors.
2. Biotic factors, abiotic factors and their interactions with one another form an ………….. .
3. …………… itself is one large biome.
4. The number of biotic factors in an ecosystem is decided by …………….. .
5. Green plants in the living world are …………….. .
6. Organisms that depend directly on autotrophs are known as …………. or ……….… .
7. Detritivores feed upon …………. of living things.
8. Each level in a food chain is called a …………….. .
Fill in the blanks:
(a) The living elements of the environment are called the …………….. factors.
(b) The non-living factors of the environment are also called the ………….. factors.