Do trees have senses?
Not in the same way that animals do. Plants do not have complex nervous and
sensory systems like animals, but they do use respond to information from
the environment, such as day length.
Plants need certain amounts of light, water and nutrients, so their
leaves have adaptations to capture light energy, and their roots are
adapted to forage and take up water and nutrients. So in this way,
trees are able to "sense" directionality and changes in amounts of
light, water and nutrients.
The following should be helpful:
Anthony R. Brach, PhD
Missouri Botanical Garden
Harvard University Herbaria
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Update: June 2012