MDCAT Biology Chapter 8 MCQ's Test With Answers

MDCAT Biology Chapter 8 MCQ's Test

Sr. # Questions Answers Choice
1 About ______% if the total energy from the sun is trapped by the producers in an ecosystem 0.5 1.0 1.5 2.0
2 The total amount of energy fixed by plants is ______ productions Gross primary Net primary Secondary All of the above
3 Soil nitrogen resources are also strengthened by the addition of ______ by the man himself Nitrogen fertilizers Nitrogen Fertilizers None of above
4 ______ incorporate gaseous nitrogen from air into organic nitrogen containing compounds Nitrogen fixing bacteria Nitrogen degrading bacteria Both A and B None of above
5 Several bacteria in soil oxidize ammonia or ammonium ions this oxidation is known as Ammonification Nitrification Assimilation All of above
6 These micro-organisms use the proteins and amino acids and release excess of ammonia (NH3) or ammonium ions (NH4). This process is known as Ammonification Nitrification Assimilation All of above
7 The principal stages of this cycle are Ammonification Nitrification Assimilation All of above
8 Nitrogen makes up ______ percent of the gases in atmosphere 76 77 78 98
9 The chief reservoir of nitrogen is the Atmosphere Water Soil Rain
10 The process by which the limited amount of nitrogen is circulated and recirculated throughout the world of living organisms is known as the Nitrogen cycle Nitrogen path way Nitrogen depletion None of above
11 The nutrient cycles are also called as Biogeochemical cycles Biochemical cycles Geo-cycles All of above
12 The chemical elements essential for life in living organisms are called ______ elements Biogenic Abiogenic Nutrient Both A and C
13 The eating of grasses is termed as Grassing Browsing Eating None of above
14 In this type of relationship only one organism benefits from the relationship. The other is not affected at all Mutualism Commensalism Parasitism All of above
15 Insect and flower relationship is the example of Mutualism Commensalism Parasitism All of above
16 Lichen is the example of Mutualism Commenaslim Parasitism All of above
17 Both organisms benefit from the ______ relationship Mutualism Commensalism Parasitism All of above
18 Mycorrhiza is an association between the roots of plants growing in acid soil and certain Virus Fungi Bacteria Nematods
19 The bacteria in the root nodules fix ______ in soil air, converting it to amino acids Nitrogen Phosphorus Sulphur Iron
20 ______ symbiont the root nodules of legume plants Virus Fungi Bacteria Nematods
Download This Set

Is this page helpful?