Biotic and Abiotic Factors

Q. ________ is a physical factor that makes up the abiotic component.

1. Hydrogen
2. Nitrogen
3. Water vapour
4. Oxygen

Q. Identify 'A', 'B' and 'C'.

1. A $\to$ Producers
   B $\to$ Decomposers
   C $\to$ Heterotrophs
2. A $\to$ Decomposers
   B $\to$ Producers
   C $\to$ Heterotrophs
3. A $\to$ Heterotrophs
   B $\to$ Producers
   C $\to$ Decomposers
4. A $\to$ Heterotrophs
   B $\to$ Decomposers
   C $\to$ Producers

Q. Identify (i) and (ii) from the given table.
$\begin{array}{cc}\text{Inorganic substances}& \text{Organic substances}\\ \text{a) Hydrogen}& \text{(i)}\\ \text{b) (ii)}& \text{Fats}\\ \text{c) Oxygen}& \text{Carbohydrates}\end{array}$

1. (i) Nitrogen, (ii) Proteins
2. (i) Proteins, (ii) Nitrogen
3. (i) Lipids, (ii) Proteins
4. (i) Nitrogen, (ii) Sodium

Q. Identify the abiotic factor(s).

1. Light
2. Soil
3. Bacteria
4. B and C

Q. Energy transfer from organism to organism in a natural community develops ___________.

1. Biological control
2. Food chain
3. Natural barriers
4. Food web

Q. Select the abiotic factors of an ecosystem.

1. Sunlight, temperature, precipitation, water or humidity, soil and bacteria
2. Bacteria, fungi, detritus and other microorganisms
3. Sunlight, temperature, precipitation, water or humidity and soil
4. Air, water and decomposers

Q. Arrange the levels of biological organisation starting from the lowest level:

1. Biome
2. Population
3. Organism
4. Community