Question
Limpets are molluscs with conical shells that cling tightly to rocks on seashores. In a study of two species of limpets found on rocks along the Oregon coast, 30 randomly placed quadrats were used to determine how often the two species occurred together. The table shows the data that were collected.
Which statistical method will determine whether these two species occur together by chance or by some kind of interaction?
A. Chi-squared test
B. t-test
C. Standard deviation
D. Means and ranges
▶️Answer/Explanation
Ans:A
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
What is the ecological term for a group of different types of organisms that live together and interact with each other?
A. Community
B. Domain
C. Ecosystem
D. Population
▶️Answer/Explanation
Markscheme
A