Which of the following will not allow osmosis to take place
- A. pig's bladder
- B. cellophane
- C. parchment paper
- D. transparent polythene
- E. cow's bladder
If an isolated living cell is left in distilled water for two hours, it is likely to
- A. lose some of its water to the surrounding water
- B. lose all of its water to the surrounding water
- C. reproduce by binary fission
- D. become more turgid
- E. die due to excess water
Which of the labelled part in the figure above will develop into new bulb?
- A. 1
- B. 4
- C. 2
- D. 3
- E. 5
The main function of 4 is to
- A. surround inner tissues
- B. produce cork
- C. produce root hairs
- D. produce lateral roots
- E. produce more of 3
The main function of 6 is to
- A. separate 5 from 7
- B. produce more of 5 and 7
- C. produce cork
- D. translocate water and mineral salt
- E. conduct carbondioxide to the other plant
Which of the following features can be used to identify the figure above
- A. Position of 7
- B. its circular nature
- C. Number of 5
- D. Presence of 3
- E. width of 2
The path taken by glucose from the ileum to the heart is
- A. Ileum →hepatic portal vein →hepatic artery → vena cava → heart
- B. Ileum → hepatic portal artery →hepatic artery → vena cava → heart
- C. Ileum → hepatic portal vein → vena cava → heart
- D. Ileum → hepatic vein → vena cava → heart
- E. Ileum → hepatic portal vein → hepatic vein → vena cava → heart
What is the genetic ratio of the F2 generation if members of F generation are allowed to self-pollinate?
- A. 1 tall : 3 short
- B. 3 tall : 1 short
- C. 1 tall : 1 short
- D. 4 short : 0 tall
- E. 4 tall : 0 short
Urea is produced in the
- A. Liver
- B. Bladder
- C. Spleen
- D. Kidneys
- E. Gall bladder
When spirogyra cell is immersed in a salt solution more concentrated than its cell sap, it
- A. Remains unchanged
- B. Takes up water an burst
- C. Absorbs a little water
- D. Loses water and shrivels
- E. Becomes turgid
Which of the following statements about the dentition of man is INCORRECT ? man has
- A. More molars than incisors
- B. No diastema
- C. The same number of teeth on upper and lower jaw
- D. A total of thirty-two teeth
- E. A total of six molars
‘Jointed skeleton’ is absent in the
- A. Cockroach
- B. Spider
- C. Millipede
- D. Snail
- E. Dragon fly
Which of the following statements about the rate of transpiration is INCORRECT? It is
- A. Dependent on temperature
- B. Affected by changes in light intensity
- C. Unaffected by humidity
- D. Dependent on air movement
- E. Affected by availability of water
In rhizopus carbohydrate is stored in the form of
- A. Glucose
- B. Paramylon
- C. Glycogen
- D. Starch
- E. Oil
Which sequence represents the correct order of organisms un a food chain? 1. Toad 2. Mucuna 3. Grasshopper 4. Snake 5. Hawk
- A. 5 → 4 → 1 → 3 → 2
- B. 1 → 2 → 3 → 4 → 5
- C. 2 → 1 → 3 → 4 → 5
- D. 2 → 3 →1 → 5 →4
- E. 2 → 3 → 1 → 4 → 5
Which of the following is NOT a characteristic of monocot plants?
- A. Occurrence of secondary thickening
- B. Parallel venation
- C. Scattered vascular bundles
- D. Floral parts arranged in threes
- E. Perianth is usually insignificant
Which of the following instruments is used for determining turbidity of water?
- A. Thermometer
- B. secchi disc
- C. rain guage
- D. Hydrometer
- E. Wind vane
The function of the ossicles (malleus, incus and stapes) in the mammalian ear is
- A. Transmission of vibrations
- B. Regulation of pressure
- C. Support of the inner ear
- D. Maintenance of balance during motion
- E. Secretion of oil
The tuber cassava is NOT a stem tuber because it
- A. Is distended with food reserve
- B. Has an aerial shoot portion
- C. Has other structure that could be called root
- D. Lacks axillary buds
- E. Has a bark over its stored food
In a positive phototropic response of a coleoptile, the region of greatest curvature is brought about by the
- A. movement of auxins away from the region of curvature
- B. even distribution of auxins in all parts of the coleoptile
- C. inhibition of growth by auxins in the region f smaller curvature
- D. concentration of auxins in the region of curvature
- E. absence of auxins in the coleoptile
Which of the following statements on the mammalian circulatory system is NOT true?
- A. Blood in the pulimonary artery is richer in oxygen content than blood in the pulmonary vein
- B. The blood in the hepatic portal vein is the richest in food substance
- C. Blood flow is controlled by valves in the veins
- D. Arteries are generally thicker and larger than veins
- E. Fibrin helps in the formation of blood clot