MDCAT Biology Chapter 8 MCQ's Test With Answers

MDCAT Biology Chapter 8 MCQ's Test

Sr. # Questions Answers Choice
1 The term ecology was first used by a ________ zoologist. American Canadian German Greece
2 Ecology is a ______ word. German British French Greek
3 The term niche in ecolgy was first proposed by: Charles Eton Ernst Haeckel Joseph Grinnell Carolus Linnaeus
4 A short food chain of two or three links supports a community: Efficiently More efficiently Inefficiently Less efficiently
5 Biosphere is spread out over the surface of planet earth extending about: 2/4 km 4/6 km 6/8 km 8/10 km
6 A collection of related parts that function as a unit is called: Organ Organism System Individual
7 The relationship between insects and flowering plants is the example of: Commensalism Mutualism Predation Parasitism
8 The solar energy used to evaporate water, heat up soil and then lost to the outer space is: 99% 77% 55% 33%
9 The total energy from the sun is trapped by the producers in an ecosystem is about: 20% 10% 5% 1%
10 The amount of energy left after plants have met their respiratory needs is net primary production, which shows up as plant: Respiration Photosynthesis Biomass Reserve
11 Several bacteria in soil are able to oxidize ammonia or ammonium ions, this oxidation is known as: Ammonification Nitrification Denitrification Amino-oxidation
12 Three principal stages of nitrogen cycle are: Ammonification, Nitrification, and Assimilation Ammonification, Acidification, and Assilimlation Esterification, Nitrification, and Assimilation Ammonification, Nitrification, and Denitrification
13 Nitrogen makes up 78 percent of the gases in: Biosphere Ecosphere Lithosphere Atmosphere
14 The nutrient cycles are also called: Biochemical cycles Geochemical cycles Biogeochemical cycles Elemental cycles
15 Nutrients required by organisms in small quantity or in trace amount like zinc, molybdenum, iron, iodine are: Macronutrients Micronutrients Mega Nutrients Both a & c
16 Nutrients required by organism in large amount like water, carbon, hydrogen, oxygen, nitrogen, phosphorus, sulphur and  calcium are: Macronutrients Micronutrients Mega Nutrients Both a & c
17 The chemical elements essential for life in living organisms are called: Biogenic elements Nutrient elements Both a & b Genetic elements
18 Over grazing may lead to: Tundra Taiga Grassland Desert
19 The animals which feed on grasses are called: Grassers Browsers Grazers Grazophytes
20 The relationship in which only one organism benefit from the relationship. The other is not affected at all. Parasitism Commensalism Predation Mutualism
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