Biology Past Questions And Answers
871
DNA in eukaryotic cells is contained in the
- A. central vacuole
- B. nucleus
- C. lysosome
- D. golgi body
872
Which of the following is not a monocotyledonous seed?
- A. cowpea
- B. maize
- C. millet
- D. wheat
873
The major consequences of bush burning in an ecosystem is
- A. the loss of water
- B. the loss of biological diversity
- C. a decrease in animal population
- D. an increase in soil fertility
874
Which of the following substances is not a conservable natural resource?
- A. Mineral
- B. Air
- C. Soil
- D. Water
875
In ecology, a community refers to
- A. a number of individuals of a given species
- B. groups of different organisms living in a habitat
- C. existing species in an abandoned farmland
- D. the dominant species in a habitat
876
interveinal chlorosis is normally associated with the deficiency of
- A. magnesium
- B. potassium
- C. iron
- D. calcium
877
In testing for starch in a leaf, the leaf is boiled in alcohol to
- A. kill the cells
- B. soften the leaf
- C. enable chemicals penetrate the leaf
- D. decolourise the leaf
878
The plants that grow in deserts or very dry areas are referred to as
- A. mesophytes
- B. hydrophytes
- C. epiphytes
- D. xerophytes
879
Which of the following substances must be present in the soil for growth of a healthy green plant?
- A. Amino acids
- B. Carbon
- C. Glucose salts
- D. Magnesium ions
880
The correct sequence for the perception of smell in mammals is
- A. chemicals → olfactory nerve endings → brain
- B. dissolved chemicals → nasal sensory cell → brain
- C. chemicals → mucus membrane → sensory cells→ brain
- D. dissolved chemicals → sensory cells → olfactory nerve → brain