|
Ecological Zone |
Temperature (ºC) |
Rainfall (mm) |
|
I |
45 | 300 |
| II | 32 | 2000 |
| III | 30 | 2200 |
| IV | 15 | 800 |
From the table above high relative humidity will be expected in zones
- A. I and III
- B. I and IV
- C. II and III
- D. II and IV
A caterpillar and an aphid living in different parts of the same plant can be said to
- A. occupy the same ecological niche
- B. be in different habitat
- C. occupy different ecological niche
- D. be in the same microhabitats
The two keys cation involved in the action potential of nervous transmissions are
- A. Na+ an Fe2+
- B. Mg2+ and K+
- C. Na+ and K+
- D. Fe2+ and Mg2+
If a nursing mother is not producing enough milk, her hormonal system is probably deficient in
- A. prolactin
- B. testosterone
- C. thyroxin
- D. insulin
Nervous control differs from hormonal control in that the former
- A. involves only chemical transmision
- B. is a lower process
- C. produces short-term changes
- D. has no specific pathway
Epigeal germination of a seed is characterized by
- A. more rapid elongation of the hypocotyl than the epicotyl
- B. more rapid elongation of the epicotyl than the hypocotyl
- C. equal growth of both the hypocotyl and epicotyl
- D. lack of growth of the hypocotyl
The eggs of birds contains relatively larger quantities of yolk than those of amphibians and reptiles because
- A. birds are generally bigger in size
- B. embryonic development is longer in birds
- C. those of birds are fertilized internally
- D. birds lay shelled eggs
The type of reproduction that is common to both Hydra and yeast
- A. conjugation
- B. binary fission
- C. grafting
- D. budding
The function of the part labelled III is to
- A. contract to pull the hair erect
- B. conduct nervous impulses
- C. carry blood and nitrogenous waste
- D. produce oil for the skin
The opening of the stoma is controlled by the
- A. presence of a pore
- B. increase in solute concentration in the guard cells
- C. presence of guard cells
- D. decrease in solute concentration in the guard cells
The anaerobic fermentation of a glucose molecule yields
- A. 38 ATP molecules
- B. 2 ATP molecules and alcohol
- C. pyruvic acid and alcohol
- D. water and carbon (IV) oxide
The surface of an alveolus in a mammal is well supplied with tiny blood vessels known as
- A. arterioles
- B. venules
- C. arteries
- D. capillaries
Which of the following results is to be expected if the set up is left for several hours?
- A. decrease in the size of the yam
- B. movement of the salt solution into the water
- C. decrease in the volume of water inside the yam
- D. movement of water from the salt solution into the yam
Yam is used in this set-up because it
- A. is a permeable to the salt solution
- B. is a plant material
- C. acts as a storage organ
- D. acts as a semi-permeable membrane
The breakdown of fats and oils into simpler absorbable compounds is catalyzed by the group of enzymes called
- A. lipases
- B. hydrolases
- C. amylases
- D. peptidases
All living cells require water because it
- A. is a medium for all metabolic reactions
- B. is a medium that neutralizes the acids in cells
- C. is the main source of energy for the cell
- D. prevents the development of dieseases in cells
The gall bladder of mammal has a duct connected to the
- A. liver
- B. duodenum
- C. small intestine
- D. pancreas
In the internal structure of plants, a wide pith in the centre is common to
- A. dicot stems and monocot stems
- B. dicot stem and monocot roots
- C. dicot roots and monocot roots
- D. dicot roots and monocot stems
A peculiar characteristics of mammals is that they
- A. have teeth
- B. are warm-blooded
- C. have lungs
- D. have sabaceous glands
the function of the long-winged reproductives of the termites colony is to
- A. disperse the population
- B. feed the young
- C. participate in swarming
- D. protect the young