The ascent of water in tall trees is mainly due to
- A. adhesive forces
- B. transpiration pull
- C. root pressure
- D. cohesive forces
By what process is starch converted into maltose?
- A. Hydrolysis
- B. Condensation
- C. Translocation
- D. Photosynthesis
One major difference between plant and animals nutrition is the ability of plants to synthesize
- A. Food for plants and animals
- B. Water for plants
- C. Water for animals
- D. Food for plants only
The source of energy required by plants during food production is
- A. Photosynthesis
- B. Chlorophyll
- C. Sunlight
- D. Microorganisms
In the diagram above, the larva is also known as
- A. Nymph
- B. Caterpillar
- C. Maggot
- D. Chrysalis
The diagram above is an illustration of the life cycle of an insect. The adult fly in this cycle is called
- A. Housefly
- B. Butterfly
- C. Cockroach
- D. Mosquito
The structures for gaseous exchange in breathing roots are
- A. stomata
- B. lenticels
- C. cuticle
- D. mitochondria
Which of the following practices may lead to infection of the eye? Use of
- A. contact lenses
- B. convex lenses
- C. biconcave lenses
- D. concave lenses
Which of the following statements about the response of neurones to stimulus is correct?
- A. Neurons respond to stimulus of any strength
- B. Neurons respond to all stimuli applied in rapid succession
- C. Neurons respond more rapidly during the absolute refraction period
- D. Intensity of stimulus must reach a threshold value before the neurons can be excited
The thyroid gland is found at the base of the
- A. Midbrain
- B. Kidney
- C. Neck
- D. Liver
Ultrafiltration in the kidney takes place in the
- A. Renal vein
- B. Medulla
- C. Loop of Henle
- D. Bowman's Capsule
An example of homeostasis in living organisms is
- A. cooling effect resulting from evaporation of water from the body surface
- B. root hairs of a plant growing towards the source of light
- C. changing of the body colour of chameleon to match the colour of the foliage on which it is resting
- D. the release of phosphorus into the phloem of a plant growing in a phosphorus-deficient soil
Which of the following is NOT an excretory product of animals?
- A. carbondioxide
- B. urea
- C. sweat
- D. oxygen
Which of the following structures would carry out cellular respiration? A
- A. germinating seed
- B. decolorised leaf
- C. dry leaf
- D. boiled cowpea
A seedling was made to stand in a solution of red ink for three hours and a transverse section of the stem was examined under the microscope. The process being investigated was
- A. the importance of micro elements to plants
- B. ascent of water through the xylem
- C. diffusion of colored substances
- D. distribution of food in plants
The odontoid process is found on the
- A. axis vetebra
- B. atlas vetebra
- C. thoracic vetebra
- D. sacral vetebra
The conclusion drawn from the experiment in the diagram above is that
- A. shoots of plants are negatively thigmotropic
- B. shoots of plants are negatively geotropic
- C. shoots of plants are positively phototropic
- D. roots of plants are positively hydrotropic
The diagrams above are illustrations of an experimental set-up to demonstrate a type of tropic response in plants. The type of response demonstrated is
- A. phototropism
- B. geotropism
- C. hydrotropism
- D. thigmotropism
Active transport differs from diffusion in that active transport
- A. is a very fast process
- B. allows the movement of substances against concentration gradient
- C. takes place in both light and dark reaction of photosynthesis
- D. occurs in both plant and animal tissues
Which of the following organelles is found only in plant cells?
- A. Mitochondria
- B. Ribosomes
- C. Lysosomes
- D. Plastids
The streaming movement of cytoplasm within the Paramecium is known as
- A. Transpiration
- B. Digestion
- C. Cyclosis
- D. Osmosis