43
Which of the following protects the essential parts of the flower at bud stage?
- A. Stamens
- B. Sepals
- C. Petals
- D. Carpels
44
Which of the following theories was NOT considered by Darwin in his evolutionary theory?
- A. variation
- B. survival of the fitest
- C. use and disuse
- D. competition
45
An example of an endospermous seed is
- A. been seed
- B. cashew nut
- C. cotton seed
- D. maize grain
46
The ability of a living organism to detect and respond to changes in the environment is referred to as
- A. locomotion
- B. taxis
- C. irritability
- D. growth
47
Which of the following plant hormone is responsible for ripening of fruits?
- A. Gibberellins
- B. Abscisic acid
- C. Ethylene
- D. Cytokinins
48
When a cell is placed in solution and the size of the cell increases, the concentration of solution is said to be
- A. isotonic
- B. dilute
- C. hypotonic
- D. hypertonic
49
The insects in which the maxillae are modified into a long coiled proboscis is
- A. housefly
- B. butterfly
- C. mosquito
- D. grasshopper
50
Which of the following conditions is NOT necessary for photosynthesis to take place?
- A. ChlorophyII
- B. Light
- C. Carbon(II)oxide
- D. Carbon(IV)oxide