Posts by 9As Exam Blog

1. The diagrams below are parts of a human lung. Which of the labelled parts is diagram Z taken from? A. II. B. III. C. IV. D. V. 2. In the adult frog gaseous exchange takes place through the A. buccal cavity, skin and lungs. B. buccal cavity, skin and…

OBJECTIVES 1. The pulmonary circulation involves movement of the blood to and from the A. brain. B. kidneys. C. liver. D. lungs. The table below shows the blood composition of four individuals. Use the Information contained in the table to answer questions 2 & 3 Individual     Blood CompositionPlasma…

OBJECTIVES 1. A person suffering from obstruction of the bile duct is advised not to eat fats and oil because A. bile digests fats and oil. B. fats and oil can only be absorbed when bile is absent. C. bile emulsifies fats and oil. D. bile adds water to digesting…

OBJECTIVES 1. When fertilization occurs that leads to formation of a zygote, which of the following processes takes place? A. The tail of the sperm fuses with the egg cell. B. Both tail and head of the sperm fuse with the egg cell. C. The nucleus of the sperm fuses…

OBJECTIVES 1. During sexual reproduction in Paramecium, how many times does the zygote divide to produce eight nuclei? A. 1. B. 2. C. 3.D. 4. 2. The dominant stage in the life cycle of a fern is the A. antheridium: B. gametophyte. C. prothalfus. D. sporophyte. 3. Some animals return…

OBJECTIVES 1. The major problem experienced by organisms living in small waterbodies is A. drying up. B. oxygen deficiency. C. scarcity of food. D. wave action. 2. Which of the following features is not an adaptation of plants to aquatic habitat? A. Breathing roots for entry of air. B. Flowers…

OBJECTIVES 1. Which of the following statements about the transfer of energy in an ecosystem is correct? A. Energy increases at higher trophic levels. B. More organisms can be supported at higher levels. C. There are fewer organisms at lower trophic level. D. Energy is lost at each trophic level.…