151. Threats to grasslands in Pakistan include:
Answer: B. overgrazing, agriculture, urbanization and climate change
Biology Class 11 Unit 15: Ecology MCQs
196 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 4 of 4.
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152. The coniferous alpine and boreal forests of Pakistan occur in the:
Answer: B. northern mountains of the Western Himalayas and Karakoram
153. Dominant trees of coniferous forests are:
Answer: B. pine, spruce, fir and cedar
154. The leaves of conifers are needle-like to:
Answer: B. conserve water
155. Alpine plants include:
Answer: B. rhododendrons and junipers
156. The animals of coniferous forests include:
Answer: B. snow leopard, brown bear, Himalayan tahr and red fox
157. The growth in alpine and boreal forests is:
Answer: B. slow due to short growing season and limited nutrients
158. Temperate deciduous forests are found in:
Answer: C. the foothills of the Himalayas and Karakoram, including Azad Kashmir
159. Deciduous trees:
Answer: B. shed their leaves in autumn
160. Common trees of deciduous forests include:
Answer: B. oak, maple, ash, walnut and deodar
161. The main human threat to deciduous forests is:
Answer: B. deforestation and unsustainable logging
162. The Department of Population Welfare provides:
Answer: B. family planning and reproductive health services
163. The rhizobium in the root nodules of legumes is:
Answer: C. a nitrogen fixing bacterium
164. Nitrogen is lost from the soil by:
Answer: C. denitrification
165. Which of the following is NOT true about ecological succession?
Answer: D. It is a random process
166. A nutrient cycle always involves the movement of nutrients through the:
Answer: B. biotic community
167. Ecosystems having very low rainfall and high temperature are:
Answer: D. deserts
168. The main cause of ocean acidification is:
Answer: C. increasing level of CO2 in the atmosphere
169. The role of decomposers in the nitrogen cycle is to:
Answer: B. release ammonia from organic compounds
170. The producers in this food chain are:
Answer: C. algae
171. The primary consumers are:
Answer: B. small crustaceans
172. The heron is a:
Answer: C. top consumer (tertiary or higher)
173. If algae store 10000 joules, the energy available to the small crustaceans is about:
Answer: B. 1000 J
174. The bacteria in the nodules are:
Answer: C. Rhizobium
175. They convert:
Answer: B. atmospheric nitrogen to ammonia
176. The relationship between bean and the bacteria is:
Answer: B. symbiosis (mutualism)
177. After the beans die and decay, the bacteria and fungi release ammonia. This process is:
Answer: C. ammonification
178. This process is:
Answer: B. primary ecological succession
179. The first colonizers are:
Answer: C. crustose lichens
180. The kind of succession on the dry rock is:
Answer: B. xerarch
181. The final stable community is the:
Answer: C. climax community
182. This is:
Answer: B. secondary succession
183. The soil here is:
Answer: B. already present
184. The succession is faster than on bare rock because:
Answer: B. soil and seeds are already present
185. The most responsible gas is:
Answer: C. carbon dioxide
186. The long-term rise in temperature is called:
Answer: B. global warming
187. The acidification of sea affects:
Answer: B. corals and shellfish
188. A likely result for coastal areas is:
Answer: B. rise in sea level due to melting ice
189. The energy available to primary consumers is about:
Answer: C. 1000 kJ
190. The energy available to secondary consumers is about:
Answer: B. 100 kJ
191. The energy available to tertiary consumers is about:
Answer: B. 10 kJ
192. The loss of energy is mainly through:
Answer: B. respiration and heat
193. The ecosystem is a:
Answer: B. desert
194. The plants here are:
Answer: C. xerophytes
195. The animals avoid heat by:
Answer: B. burrowing and nocturnal habits
196. The primary productivity here is:
Answer: B. low
About Biology Class 11 Unit 15 MCQs (Federal Board)
These 196 Biology MCQs cover Class 11 Unit 15: Ecology of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 4 pages of 50. Use the Print button to save this chapter as a PDF.