Biology 2017 JAMB Past Questions - Question 38: Which of the following factors can reduce the population of a community?

Correct Answer

C

Explanation

Predation is the act of killing and eating other animals as food. if the predators are many, the population of the smaller animals referred to as preys will be reduced drastically. Edaphic or soli factor is the abiotic factor that deals with the physical and chemical composition of the soil found in a particular area. it deals with soil type {colour, texture and structure and constituents), pH of soil, soil water, air and organic matter. Immigration is the addition of individuals !%o a population through migration or movement of organisms into a population. Emigration is the loss of individuals from a population through migration :* movement of organisms out of a population. Mutualism is an association between two organisms of different species r which each benefits from the other. Examples are (a) lichen an intimate association between unicellular aiga and a fungus. Mycorrhiza is an association between a fungus and root of higher plant. The fungus has several hyphae around the root which assist the root to absorb mineral ions from the soil. The fungus benefits by obtaining soluble organic food from the root cells.