(a) Complete the table below by naming the nutrient cycle that involves each of the given processes and give three other processes involved in the nutrient ...
Question 1 Report
(a) Complete the table below by naming the nutrient cycle that involves each of the given processes and give three other processes involved in the nutrient cycle.
(b)(i) What is irritability?
(ii) Complete the table below by stating the type of response elicited by each of the given actions.
(c) Name three animals each that exhibit: (i) territoriality (ii) seasonal migration (iii) display
Answer Details
(a) Nutrient cycle for each process
| Given process | Nutrient cycle | Three other processes in the cycle |
|---|---|---|
| Nitrogen fixation | Nitrogen cycle | Nitrification; denitrification; ammonification (decay of nitrogenous matter) |
| Photosynthesis | Carbon cycle | Respiration; combustion (burning); decomposition of dead matter |
(b)(i) What is irritability?
Irritability (sensitivity) is the ability of a living organism to detect and respond to changes (stimuli) in its internal or external environment.
(b)(ii) Type of response elicited by each action
| Action / stimulus | Type of response |
|---|---|
| Sudden withdrawal of the hand from a hot object | Reflex action (involuntary response) |
| A plant shoot bending towards a source of light | Tropism (phototropism, a growth response) |
| A whole organism moving towards or away from a stimulus | Taxis (tactic response) |
(c) Three animals that exhibit each behaviour
(i) Territoriality: male Agama lizard; male Tilapia (fish); dog.
(ii) Seasonal migration: swallow; wildebeest; salmon.
(iii) Display: peacock; domestic fowl (cock); pigeon.
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