Population Ecology & Interactions — NEET Biology
📚 Practice ConceptList the attributes that populations possess but not individuals. 2. If a population growing exponentially double in size in 3 years, what is the intrinsic rate of increase (r) of the population? 3. Name important defence mechanisms in plants against herbivory. 4. An orchid plant is growing on the branch of mango tree. How do you describe this interaction between the orchid and the mango tree? 5. What is the ecological principle behind the biological control method of managing with pest insects? 6. Define population and community. 7. Define the following terms and give one example for each: (a) Commensalism (b) Parasitism (c) Camouflage (d) Mutualism (e) Interspecific competition 8. With the help of suitable diagram describe the logistic population growth curve. 9. Select the statement which explains best parasitism. (a) One organism is benefited. (b) Both the organisms are benefited. (c) One organism is benefited, other is not affected. (d) One organism is benefited, other is affected. 10. List any three important characteristics of a population and explain.
Which of the following statements concerning different types of population interactions are NOT correct? S1: In amensalism, one species is harmed, while the other species derives significant benefit from the interaction. S2: Commensalism, like parasitism, involves close physical association between the interacting species, where one benefits and the other is unaffected. S3: Predation always results in the death of the prey organism, and phytophagous insects are not ecologically considered predators. S4: Mutualism is an interaction where both species derive benefits, and it typically does not involve co-evolutionary relationships between them. S5: Competition is defined as a process where the fitness of one species is significantly lowered in the presence of another, regardless of resource abundance for all species.
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