Question
Which organism can best be described as a saprotroph?
A. A fungus that digests its food externally and absorbs the products of digestion
B. A beetle that feeds by ingesting the dung of other animal species and digesting its food internally
C. A single-celled eukaryote that is able to photosynthesize and consumes smaller organisms by endocytosis
D. A giraffe that feeds by ingesting leaves from an acacia tree
▶️Answer/Explanation
Markscheme
A
Question
Which is not essential in a viable mesocosm?
A. Light source
B. Autotroph
C. Saprotroph
D. Herbivore
▶️Answer/Explanation
Markscheme
D
Question
The Venus flytrap (Dionaea muscipula) is a photosynthetic plant. It obtains nitrogen but not energy by digesting captured insects.
Which term describes this plant?
A. Secondary consumer
B. Autotroph
C. Primary consumer
D. Saprotroph
▶️Answer/Explanation
Markscheme
B
Question
Which row of the table describes a type of nutrition?
▶️Answer/Explanation
C
Question
Outline the role of fungi in nutrient cycling.
▶️Answer/Explanation
a. act as saprotrophs/decomposers
b. rot/feed on/break down organic matter/food/organisms
OR
return nutrients trapped in organic matter to the cycle/soil
Question
The pie chart shows the modes of nutrition of fungi in Huahu Lake wetland in China.
What is the most common mode of nutrition of fungi in this wetland?
A. Heterotrophic fungi that feed on living organisms by ingestion
B. Autotrophic fungi that obtain organic nutrients from detritus by internal digestion
C. Fungi that have either an autotrophic or heterotrophic method of nutrition
D. Heterotrophic fungi obtaining nutrients from dead organisms by external digestion
▶️Answer/Explanation
D