These special features are called adaptations. The spines of a cactus are much better than flat leaves at preventing water being lost from the plant. The spines are also good protection from ...

Save guides, add subjects and pick up where you left off with your BBC account. The spines of a cactus are much better than flat leaves at preventing water being lost from the plant. The spines ...

The video could be used as starter on a lesson on evolution, adaptation and natural selection ... The long pointed beak of the common cactus finch helps it extract seeds from cactus fruit. Other ...