A houseplant that is bending toward a sunlit window is ___.

The root tips of most plants show ___.

Leaves become red and orange in autumn because ___.

A stimulus to which a plant will respond is ___.

When the plant cells on the dark side of a shoot grow longer than the cells on the other side, this causes the shoot to bend toward the sunlight. This is an example of ___.

The maple tree, which loses its leaves each year, is ___.

The tendency of shoot tips of plants to grow and bend toward the light is called ___.

Day length and night length have an effect on a plant's growth. This is an example of the influence of __.

Choose the answer that is MOST accurate from the choices below. A tropism is growth in response to ___.

Plants that have leaves year round are ___.

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