Biology Past Questions And Answers
Aged erythrocytes are destroyed in the?
- A. pancreas
- B. liver
- C. lymph nodes
- D. kidney
(a) Define the following terms:
(i) gene
(ii) gene mutation.
(b) Name two structures each of plants and animals where the following processes take place:
(i) mitosis
(ii) meiosis.
(c) State four advantages a farmer may hope to derive in cross breeding two different breeds of cows.
(d) State three applications of the knowledge of genetics in medicine.
View Discussion (0)WAEC 2007 THEORYWhich of the following practices improves crop yield in a clayey soil? Addition of
- A. more water and humus
- B. lime and humus
- C. fertilizers
- D. weedicides and fertilizers
In demonstrating the importance of mineral elements in plants, the culture bottle must be darkened to?
- A. prevent algal growth in culture solution
- B. allow root growth
- C. prevent breakdown of mineral elements
- D. prevents photosynthesis in the root
The rate of transpiration is NOT affected by
- A. the weight of the stomata pores
- B. humidity
- C. temperature
- D. the size of the stomata pores
The following are features of the tropical rainforest except
- A) loose and moist soil
- B) short trees growing beneath tall trees
- C) scanty trees with small leaves
- D) presence of many animals
The physical and chemical factors which affect the life of organisms in an environment are described as
- A. biotic
- B. edaphic
- C. abiotic
- D. physiographic
A meal consisting of yam and a lot of vegetables is not balanced because it does not contain
- A. carbohydrates
- B. proteins
- C. vitamins
- D. minerals
The site for production of a ATP in a cell is
- A. ribosome
- B. cytoplasm
- C. Golgi body
- D. mitochondrion
The correct pathway for blood flow from the heart to the tissues of mammals is?
- A. heart-arteriole-artery-tissues
- B. heart-artery-arteriole-tissues
- C. heart-vein-venule-tissues
- D. heart-venule-vein-tissues