A Level Biology Practice Exam

What type of organisms are saprophytic?

1. Organisms that produce their own food through photosynthesis

2. Organisms that acquire nutrients by absorption of decaying material

3. Organisms that live symbiotically with plants

4. Organisms that are strictly carnivorous

The correct answer is: Organisms that acquire nutrients by absorption of decaying material

The chosen answer is correct because saprophytic organisms, also known as saprophytes, obtain their nutrients by breaking down and absorbing organic matter from dead or decaying materials. This process plays a crucial role in nutrient cycling within ecosystems, as these organisms help decompose complex organic substances into simpler compounds that can be reused by other organisms, thereby maintaining soil health and fertility. The other options describe different types of organisms: the first option refers to autotrophs, which produce their own food through photosynthesis; the third option describes organisms that engage in mutualistic relationships with plants, often exchanging nutrients or support; and the fourth option pertains to carnivorous organisms that primarily feed on other animals. Each of these choices highlights distinct nutritional strategies that do not involve the absorption of decomposed materials.