Correct Answer: C. rhesus factors of the donor and the recipient

Correct Answer: B) It has no woody species

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.

Correct Answer: A. heterotrophic

Explanation

Heterotrophic nutrition is a type of nutrition in which an organism obtains its food by consuming organic matter from other organisms. In the case of pitcher plants, they capture and digest insects as a source of nutrients to supplement their diet, especially in nutrient-poor environments. This carnivorous adaptation is a specialized form of heterotrophic nutrition, as the pitcher plant relies on consuming other living organisms (insects) to meet its nutritional needs. The pitcher plant is a carnivorous plant that has modified leaves forming pitcher-like structures.

Correct Answer: D. transpiration

Correct Answer: B. 50%

Correct Answer: D. pellicle

Correct Answer: D. rickets

Correct Answer: B. Sundew

Correct Answer: B. 090 per m²

Correct Answer: A. right auricle and right ventricle.

Explanation

The heart has four chambers: two atria (auricles) and two ventricles. The tricuspid valve is one of the heart's valves and is located between the right atrium (right auricle) and the right ventricle.