MDCAT Biology — Ecology
Ecology is a core Biology topic in the PMDC MDCAT syllabus, covering 6 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (6)
- Atmospheric Pollution (Ozone Depletion)
- Energy Resources
- Eutrophication
- Food Chain and Food Web
- Levels of Biological Organization
- Symbiotic Relationships
How Ecology is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Ecology accounts for 20 questions. It appears in 4 of them, about 5 questions a paper. The heaviest was MDCAT 2010, with 7 questions, and the most recent is MDCAT 2011, with 6.
| Paper | Questions |
|---|---|
| MDCAT 2011 | 6 |
| MDCAT 2010 | 7 |
| MDCAT 2009 | 4 |
| MDCAT 2008 | 3 |
Ecology MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2011 · Ecology
Which one of the following is depleting and causing thinning of ozone?
- A.Chlorine
- B.Bromine
- C.Chlorofluorocarbon
- D.Carbon
Show answer
Answer: C. Chlorofluorocarbon — Chlorofluorocarbons (CFCs) are the primary human-made chemicals responsible for depleting and thinning the ozone layer.
- Q2 · MDCAT 2010 · Ecology
Group of interbreeding individuals of particular species, sharing common geographical area is called:
- A.Population
- B.Community ecology
- C.Community
- D.Autecology
Show answer
Answer: A. Population — A group of interbreeding individuals of the same species sharing a common geographic area is called a population.
- Q3 · MDCAT 2009 · Ecology
Diseases in living organisms which are caused by parasites are called:
- A.Disinfestations
- B.Antisepsis
- C.Infections
- D.Infestations
Show answer
Answer: D. Infestations — Diseases caused by parasites living on or in a host organism are called infestations.