Describe the structural features of guard cells.
Stomata show daily opening-and-closing rhythms. Fig. 6.1 presents the percentage of stomata open at various times of day, across three days, in the thale cress plant, Arabidopsis thaliana.
Using Fig. 6.1, describe how stomatal opening and closing follow a rhythm.
Suggest other environmental influences, apart from the time of day, that can lead to stomatal closure.
Using Fig. 6.1, describe the pattern of stomatal opening and closing.
Name other environmental factors, apart from the time of day, that can lead to stomatal closure.
Table 6.1 presents some of the events that happen during closure of a stoma. They are not arranged in the correct sequence. Complete Table 6.2 so that it shows the proper order of the events listed in Table 6.1. Three of the events have already been done for you.