Plant Response & Growth
react
Another word for respond is _____.
photoperiodism
Deciduous plants dropping their leaves in the fall season is an example of _____.
heliotropism
Desert plants leaves moving away from the Sun to conserve water is an example of negative _____.
stimulus
In the picture, #1 shows the _____. (stimulus or response)
response
In the picture, #2 shows the _____. (stimulus or response)
respond
Like all living things, plants must be able to _____ to their environment to survive.
growth, seed sprouting, leaf growth/fall, budding, flowering, fruiting
List some plant processes (responses) that are controlled by hormones.
make food
One very important purpose of plant leaves is to _____.
transport materials
One very important purpose of plant stems is to _____.
absorb water
One very important purpose of the root system is to _____.
seasons
Photoperiodism allows plants to respond to different _____, which have different average temperatures.
movement
Responses are usually some type of _____.
thigmotropism
Roots moving away from underground, solid objects (such as rocks) is an example of negative _____.
light. water, gravity, temperature, touching objects
Some examples of plant stimuli are:
thigmotropism
Tendrils on vines moving towards (often coiling around) solid objects as the plant climbs is an example of positive _____.
Earth
The prefix geo- means _____.
Sun
The prefix helio- means _____.
water
The prefix hydro- means _____.
light
The prefix photo- means _____.
heat
The prefix thermo- means _____.
touch
The prefix thigmo- mean _____.
root, shoot
The two basic organ systems of a plant are the _____ system and the _____ system. (Botttom -> Up)
survival
Tropisms have evolved in plants to help them get the resources/materials that they need for their _____.
geotropism
What type of tropism is shown?
hydrotropism
What type of tropism is shown?
phototropism
What type of tropism is shown?
heliotropism
Young sunflower "heads" moving to stay pointed at the Sun as it moves across the sky each day is an example of positive _____.
dormancy
_____ is a period of a plant's life where growth and and other life processes slow down or stop - think plant "hibernation."
stimulus
A _____ is a change in a plant's environment that causes a change in the plant's behavior or activity. (Think CAUSE!)
tropism
A _____ is plant movement/growth toward or away from a stimulus.
negative
A _____ response stimuli will cause a plant to grow away from the stimuli.
positive
A _____ response will cause a plant to grow towards the stimuli.
nervous
A plant's system of receptors and hormones is most like the _____ system in humans.
winter
For many plants in our biome, _____ is the season of dormancy.
gravitropism
Geotropism is also called _____.
thermotropism
Plant leaves drooping during cold weather is an example of _____.
geotropism
Plant movement/growth in response to gravity is called _____.
phototropism
Plant movement/growth in response to light is called _____.
heliotropism
Plant movement/growth in response to the Sun is called _____.
thigmotropism
Plant movement/growth in response to touching a solid object is called _____.
hydrotropism
Plant movement/growth in response to waer is called _____.
geotropism
Plant root movement/growth towards gravity is an example of positive _____.
phototropism
Plant roots movement/growth away from light is an example of negative _____.
hydrotropism
Plant roots movement/growth towards water is an example of positive _____.
stems, leaves
Plant shoot systems consist of _____ and _____.
geotropism
Plant stem movement/growth away from gravity is example of negative _____.
thigmotropism
Plant stems movement/growth away from an solid object (like a wall) are an example of negative _____.
phototropism
Plant stems movement/growth towards more light is an example of positive _____.
false
Plants are able to detect water over several feet away. (true or false)
true
Plants can collect information about their environment and adapt their behavior and growth (true or false)
true
Plants have a sense of touch that can be more sensitive than a human's sense of touch. (true or false)
photosynthesis
Plants have evolved to respond to light because light is required for _____, which is the process plants use to make their food.
response
Plants reaction to a stimuli is called a _____. (Think EFFECT!)
receptors
Plants use _____ to sense their environment.
energy
Plants use dormancy to conserve _____ in response to environmental conditions (like season's of freezing temperatures or seasons of drought).
photoperiodism
Plants use receptors to sense the length of day and/or night; this is called _____.
hormones
Plants use signaling chemicals, called _____, to control their growth.