Zadanie 1d
Suggest two reasons for the difference in stomatal density between shrubs in hotter and cooler habitats.
- Materiał graficzny
Water loss during leaf gas exchange
Explain transpiration and predict how environmental conditions affect its rate.
Tę umiejętność sprawdza 14 zadań wzorowanych na arkuszach IB z lat 2022–2026.
Zadania sprawdzające tę umiejętność: 14 Otwórz w wyszukiwarce z filtrami
Zadanie 1f
Suggest one benefit of reducing stomatal density when atmospheric CO₂ is more abundant.
- Materiał graficzny
Zadanie 5a
State one environmental variable that affects the rate at which a leaf transpires.
Zadanie 24
Identical leafy shoots with open stomata are supplied with water. Which environmental change would increase water loss from their leaves, with other factors held constant? A. Replacing moving air with still air B. Raising air temperature while keeping relative…
Zadanie 24
Which pair of changes would tend to increase transpiration from a well-watered plant with open stomata? A. Lower light availability and higher relative humidity B. Lower air temperature and higher relative humidity C. Higher relative humidity and slower air…
Zadanie 6
(a) Outline how evaporation of sweat cools the body. (b) Describe the kidney’s response when body water is depleted. (c) Explain the movement of water from soil, through a flowering plant and into the air.
Zadanie 3b
Explain the difference in water-loss rate between light and dark periods.
- Materiał graficzny
Zadanie 3c
Describe a treatment that could help identify which shoot parts lose water.
- Materiał graficzny
Zadanie 28
A cut leafy shoot is connected to a sealed potometer. An air bubble in its capillary moves towards the shoot as water is taken up. With other factors controlled, in which conditions is movement usually fastest? A. Warm, humid air B. Cool, dry air C. Cool,…
Zadanie 28
A cut leafy shoot is connected to a sealed potometer. An air bubble in its capillary moves towards the shoot as water is taken up. With other factors controlled, in which conditions is movement usually fastest? A. Warm, humid air B. Cool, dry air C. Cool,…
Zadanie 1a
Define transpiration.
Zadanie 6
Water has physiological roles in both plants and mammals. (a) Outline how water’s properties allow evaporation to cool an animal. (b) Describe how weather affects the movement and loss of water in a terrestrial plant. (c) Explain how a dehydrated mammal…
Zadanie 32
With other conditions held constant, which sketch best represents the usual effect of higher air humidity on transpiration? A. Sketch A B. Sketch B C. Sketch C D. Sketch D
- Materiał graficzny
Zadanie 32
A water-filled potometer estimates water uptake by tracking a bubble in a capillary. To compare uptake rates of two leafy plant species, which variables should be kept the same? I. Total exposed leaf area. II. Air temperature. III. The decorative colour of the…