Answer: True
A food chain is a linear sequence of distribution of food and energy among organisms. In an ecosystem one organism is consumed by another organism in order to gain energy. A quaternary consumer species consume population of secondary consumer species. A quarter consumer species would be expected to have a smaller population than a secondary consumer species because increase of quarternary population more than secondary consumer species will create scarcity of secondary consumer species which will result in decline of quarternary consumer species. Hence, to maintain the balance in nature, the quarternary species should be smaller than population of secondary consumer species.