Exam 6: Plant Adaptations to the Environment

Many plants adapted to arid environments use the ________ photosynthetic pathway to fix CO₂ during the night.

The osmotic potential of a plant refers to the

Which of the following conditions is required for the continued movement of water from the soil into and through a plant via transpiration?

In photosynthesis,the net uptake of CO₂ by a plant is greatest

CAM plants

Compared with a shade-intolerant plant,a shade-tolerant plant

The higher rates of diffusion and photosynthesis under elevated atmospheric concentrations of CO₂ have been termed the ________.

The value of photosynthetically active radiation above which no further increase in photosynthesis occurs is referred to as

Chemoautotrophs are the dominant primary producers in oxygen-deficient environments,such as the hydrothermal vents of the deep ocean floor.

In photosynthesis,carbon dioxide enters the leaf of a plant through its open stomata.

The enzyme that catalyzes carboxylation during photosynthesis is called ________.

The ratio of carbon fixed (photosynthesis)per unit of water lost (transpiration)is called the ________ efficiency.

The growth rate of plant cells and the efficiency of their physiological processes are highest when the cells are at minimum turgor.

The drier the air outside a leaf,the faster is water lost from the leaf through the stomata.

Which group of plants responds to increased CO₂ with the highest biomass enhancement ratio?

In the Calvin-Benson or C₃ photosynthetic pathway,the enzyme rubisco catalyzes the reaction called

Unlike terrestrial plants,submerged aquatic plants lack

Water in plants is lost to the atmosphere through the stomata.

Much of the nitrogen taken in by a plant is used to synthesize the molecules rubisco and ________.

Carbon balance focuses on the balance between