Examine the Figure Below. It shows the results of an interspecific population in

Question

Examine the Figure Below. It shows the results of an interspecific population interaction experiment between two algae. The preceding figure is consistent with which ecological interaction? Competition: Colostrum excludes Euglena Competition: Euglena excludes Colostrum. Both species compete, but coexist. Euglena seems to exhibit a commensal interaction with Colostrum. The two species drive each other extinct Based on the preceding figure, you could conclude. Gauze's principal is supported, Euglena excludes Colostrum in mixed culture. Although the results do not match Gauze's his principal is still supported by this experiment (the data may have been due to experimental error). The two species are not likely to coexist in nature. Since the results do not match gauze's principal, the experiment was a failure and conclusions cannot be drawn. The two species do not compete for an important, limiting resource.

Explanation / Answer

22)Since, the population of Clostridium is same in both alone as well as in mix , hence Euglena has no exclusion effect on Clostridium because as per Gause's principle, two species competing for the same resource cannot coexist at constant population values. Since, population values for Clostridium is constant.

Euglena seems to exhibit commensal interation with Clostridium as Euglena is benefitted while Clostridium has neither loss nor benefit. Hence, the correct answer is option D.

23) Option E is correct as there is no decline in any population level in mix.

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