A．To remind students of information from a previous lecture.
B．To point out a feature common to all desert plants.
C．To reinforce a point about drought-tolerant plants.
D．To help students understand the concept of adaptation.
A．The ability to absorb water from dry soil.
B．The ability to absorb water through their leaves.
C．The ability to prevent moisture from being lost through their leaves.
D．The ability to shed their leaves when necessary.
A．Annual plants have an extensive root system that can absorb water.
B．Annual plants produce seeds all year long.
C．Seeds of annual plants can store water for a long time.
D．Seeds of annual plants can survive for a long time without water.
A．It is an example of what Dadaists were reacting against.
B．It shows something that Dadaists would consider beautiful.
C．It illustrates how Dadaists rejected the traditional definition of art.
D．It explains the Dadaists' practice of creating sculptures from everyday objects.