Which of the following is an incorrect statement about savanna?

Explanation

This Biology question is asking which of the following statements about savanna is incorrect. The options are as follows: Option A: It occupies about 80% of the land surface of Nigeria. Option B (Correct): It has no woody species. Option C: It is usually burnt annually. Option D: It is a closed or nearly closed cover of grasses. Savanna is a type of ecosystem characterized by grassy plains with scattered trees or shrubs. Option B is the correct answer because it states that savanna has no woody species which is an incorrect statement. Savanna does have woody species, although they are not as densely packed as in a forest. Option A is true as savanna does occupy about 80% of the land surface of Nigeria. Option C is also true as savanna is usually burnt annually to maintain the ecosystem. Option D is also true as savanna is a type of grassland with scattered trees or shrubs. In summary, the correct answer to this question is Option B: It has no woody species. To learn more about savanna and other types of ecosystems, please see the relevant sections of the recommended textbooks.