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Sbt2440:Ecology And Environmental Science Question Paper

Sbt2440:Ecology And Environmental Science

Course:Bachelor Of Horticulture

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

QUESTION ONE – 30 MARKS
(a) Define: (10Marks) (i) Ecology (ii) Community (iii) Disturbance (iv) A population in equilibrium and give the formula (v) Autotroph (vi) Ubiquitous resources (vii) Environmental Pollution (viii) Environmental conservation (as defined by IUCN) (ix) Environmental Impact Assessment (x) Environmental Law
(b) Give 3 disadvantages of a food web over a food chain. (3Marks) (c) What element is the biogeochemical cycle never makes its way into the atmosphere but will always be in an organism, dissolved in water or caught up in rocks? (½Marks) (d) State and elaborate 3 problems associated with agricultural ecosystems as compared to the natural systems. (3Marks) (e) Briefly describe “environmental constraints on expanding food production” (5Marks)
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(f) Describe the Hydrologic cycle giving an illustration. (5Marks) (g) Outline 3 possible fates of Carbon in plants. (3Marks) (h) Which is the correct sequence of Nitrogen in cycle? (½Marks) (i) Fixation, Nitrate formation, denitrification (ii) Denitrification, Nitrate Formation, Fixation (iii)Fixation, Denitrification, Nitrate Formation (iv) Nitrate formation, Fixation, Denitrification
QUESTION TWO –20 MARKS Discuss 5 ways through which natural renewable resources are being endangered. (20Marks)
QUESTION THREE – 20MARKS Discuss 5 types of environmental pollution, giving the effects of each. (20Marks)
QUESTION FOUR – 20MARKS Discuss how agriculture has badly/adversely affected the environment. (20Marks)
QUESTION FIVE – 20MARKS
Discuss 5 different things that need to be done to harmonize population growth, food supply and environment. (20Marks)

Sbt2440:Ecology And Environmental Science Question Paper

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