The lime water in container C turned milky because?
- A. Carbon dioxide was produced by plant during respiration
- B. Carbon dioxide entered through the filter pump
- C. Oxygen reacts with lime water to produce milkiness
- D. Soda lime did not remove carbon dioxide from the air
- E. The delivery tubes were not well connected
The lime water in container C turned milky because
- A. carbon dioxide was produced by plant
- B. during respiration carbon dioxide entered C
- C. oxygen reacts with lime water to produce milkiness
- D. soda lime did not remove carbon dioxide from air
- E. the delivery tubes were not well connected
Reserved food materials is
- A. stored in the parts numbered 2 and 3
- B. stored in the part numbered 3 only
- C. stored in the part numbered 4 and 5
- D. not concentrated in any particular part
- E. found in all except 1
The testa
- A. is normally absent
- B. is included in the part numbered (1)
- C. is fused in the part numbered (3)
- D. is the part numbered (1)
- E. surrounds the part numbered (4) and (5)
Which of the labelled parts is the venga caval opening?
- A. 1
- B. 2
- C. 3
- D. 4
- E. 5
Why is the part labelled 5 thicker than 6?
- A. 5 is the left ventricle and 6 the right ventricle
- B. 6 is the left ventricle and 5 the right ventricle
- C. 5 receives blood from the left auricle and 6 from the right
- D. 5 pumps blood round the body and 6 pumps blood into the lungs
- E. 5 deals with oxygenated blood and 6 deals with deoxygenated blood
In the figure above the structure which prevents friction between the bones is
- A. 1
- B. 2
- C. 3
- D. 4
- E. 5
In animals, cilia, flagella, pseudopodia and chaetae, can be used for
- A. reproduction
- B. fighting
- C. attachment to plants
- D. locomotion
- E. locating sensation
The amount of water loss from a leaf can be detected using
- A. lime-water
- B. red litmus paper
- C. blue litmus paper
- D. blue cobalt chloride paper
- E. pink cobalt chloride paper
A mosquito which produces eggs which float, and whose larvae lie horizontal to the water surface, also rests at the angle on a vertical surface. This type of mosquito is
- A. Aedes
- B. Anopheles
- C. Culex
- D. Tiger mosquito
- E. none of the above
Below are some group of diseases. Which group of diseases is caused by bacteria?
- A. Tuberculosis, smallpox
- B. Gonorrhoea, measles
- C. Tuberculosis, polio
- D. Sleeping sickness, measles
- E. Syphilis, gonorrhoea
Oxygen from the atmosphere reaches the mammalian blood stream through one of the path indicated below. Indicate the correct path, a = mouth, b = trachea, c = bronchiole, d = nostril, e = bronchus, f = alveoli
- A. a → b → e → f → d
- B. b → d → f → e → c
- C. d → b → e → c → f
- D. b → a → f → e → c
- E. f → e → c → d → c
A few grams of dried soil were first heated until red hot and then further heated until no more smoke was released. This experiment was to determine
- A. amount of water in soil
- B. percentage of water in soil
- C. presence of humus in soil
- D. resistance of laterities to heat
- E. release of smoke from the soil
During thunderstorms the energy of lightning discharge causes
- A. oxygen and nitrogen to combine
- B. more carbon dioxide to be formed
- C. nitrites to be converted to nitrates
- D. nitrates to be converted to nitrogen
- E. death
Leguminous plants, e.g Mucana, are usually planted in cultivated farmlands because they
- A. enrich the soil with phoshates
- B. provide animals with food
- C. enrich the soil with organic nitrogen
- D. protect the soil from being over-heated
- E. protect the micro organisms in the soil
If a baby is a female, her mother’s ovum must have been fertilized by a sperm carry the chromosome
- A. X
- B. XY
- C. XX
- D. YY
- E. Y
if three 30 cm lengths of glass tubes are tightly packed with clay, sand and loamy soils respectively and then stood in a beaker of water for one week, the level of water will be
- A. lowest in the tube with clay
- B. the same in all tubes
- C. lowest in the tube with loamy soil
- D. highest in the tube with sandy soil
- E. lowest in the tube with sandy soil
The tips of some rice seedlings were cut off while some were left intact. Both were covered with a container which had not only one small hole to allow light through. After twenty-four hours it was observed that
- A. the cut tips was bent away from the light
- B. the cut tips bent towards source of light
- C. the intact tips bent away from the light
- D. the intact tips bent towards the light
- E. both tips bent away from light
An organism X lives entirely on the waste products in another organism Y. In this association X is a
- A. symbiont
- B. commensal
- C. saprophyte
- D. parasite
- E. epiphyte
A student trying to find out the order in which organisms appear on a cleared plot is studying one of the following
- A. Ecosystem
- B. Food chain
- C. Food web
- D. Succession
- E. Community
The center which controls respiratory activities the mammalian brain is the
- A. cerebrum
- B. olfactory lobe
- C. pituitary organ
- D. cerebellum
- E. medulla