Page 1 - 3- Home Assignment I (Obj & Subj)- Bio- geo chemical cycles-1

SAI International School
Subject- Biology
Chapter- Natural Resources
Subtopic- Bio- geo chemical cycles-1
Module- 34
Home Assignment – I

Objective (MCQ)

1. Which of the following processes is not a part of water-cycle occurring in nature?
(a) Precipitation
(b) Transpiration
(c) Nitrogen fixation
(d) Evaporation
2. The nitrogen molecules present in air can be converted into nitrates and nitrites by:
(a) A biological process of nitrogen fixing bacteria present in soil.
(b) A biological process of carbon fixing factor present in soil.
(c) Any of the industries manufacturing nitrogenous compounds.
(d) The plants used as cereal crops in field.
3. The process of conversion of ammonia into nitrates is called:
(a) Ammonification
(b) Nitrification
(c) Photosynthesis
(d) Respiration
4 A non-renewable source of energy is:
(a) Solar energy
(b) Wind energy
(c) Tidal energy
(d) Natural gas
5 The zone of earth where the atmosphere, hydrosphere and lithosphere interact is:
(a) Microsphere
(b) Lithosphere
(c) Biosphere
(d) Stratosphere
6 Which one among the following is used as environment indicators or bio-indicators
to check the level of pollution?
(a) Lichens
(b) Mosses
(c) Ferns
(d) All the above
7 Biotic components of an ecosystem consists of:
(a) Consumers
(b) Producers
(c) Decomposers
(d) All the above
8 Decomposers include which of the following in a natural ecosystem?
(a) Algae only
(b) Green plants only
(c) Bacteria and fungi
(d) All the above
9 Which of the following is an abiotic component of the environment?
(a) Plants