Standard Science Primary 6 Interactions

Tim noticed that moss only grows on the shady side of tree trunks in the forest. Which environmental factor is most likely limiting the growth of moss on the sunny side?

A Concentration of oxygen
B Presence of predators
C Availability of food
D Temperature and moisture
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Worked Solution

Step 1: The sunny side has higher temperatures and lower moisture due to evaporation. Step [2-9]: Mosses require damp, cool conditions to survive and reproduce. Step [2-9]: Therefore, heat and dryness on the sunny side limit its growth.

Correct answer: Temperature and moisture

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