Chapter 13: Plant Processes Question Preview (ID: 1701)


Section 3.

A houseplant that is bending toward a sunlit window is ___.
a) displaying a positive tropism
b) displaying a negative tropism
c) undergoing genetic change
d) showing a seasonal effect

The root tips of most plants show ___.
a) negative phototropism
b) positive gravitropism
c) positive phototropism
d) negative gravitropism

Leaves become red and orange in autumn because ___.
a) they obsorb red pigment
b) their green chlorophyll breaks down
c) they obsorb orange pigment
d) they receive more sunlight

A stimulus to which a plant will respond is ___.
a) light
b) gravity
c) change of seasons
d) all of the answers

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 ___.
a) gravitropism
b) phototropism
c) seasonal response
d) negative tropism

The maple tree, which loses its leaves each year, is ___.
a) deciduous
b) evergreen
c) coniferous
d) anther

The tendency of shoot tips of plants to grow and bend toward the light is called ___.
a) gravitropism
b) phototropism
c) transpiration
d) cellular respiration

Day length and night length have an effect on a plant's growth. This is an example of the influence of __.
a) soil content
b) the environment
c) gravitropism
d) chlorophyll

Choose the answer that is MOST accurate from the choices below. A tropism is growth in response to ___.
a) light
b) touch
c) a stimulus
d) gravity

Plants that have leaves year round are ___.
a) deciduous
b) evergreen
c) gravitropism
d) phototropism

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