WorksheetsTropisms 21-22
Total questions: 14
Worksheet time: 1hrs 10mins
Four students observed a wilted plant and were asked to identify the internal stimulus that caused the wilting. Their responses are shown below. Which student correctly identified the internal cause of the wilted plant?
Student 4
Student 3
Student 2
Student 1
The picture above shows the leaf of a venus flytrap. The leaf has hairs that the plant uses to feel when it is being touched. Which of the following best explains the stimulus and response relationship that may occur with these leaves?
The plant senses when a cool breeze touches a hair, the stimulus, and snaps its leaf shut, the response, to keep itself protected from cold weather.
The plant opens its leaf, the stimulus, and insects attract to the leaf, the response.
The plant senses when an insect touches a hair, the stimulus, and snaps its leaf shut, the response, to feed on the insect.
The plant opens its leaf, the stimulus, and the plant feels the need to find water, the response.
The picture below shows a flower experiencing phototropism, a type of growth movement.
Which of the following best explains the external stimulus that is causing the response in the picture?
The plant, stimulated by light through the window, is responding by growing toward that light.
The plant, stimulated by a need for water, is responding by its roots pushing out of the soil to search for water.
The plant, stimulated by a need for growth, is responding by trying to leave its pot because of lack of space.
The plant, stimulated by indoor air, is responding by growing toward the preferred outdoor air.
What is most likely to cause wilting in plants?
Long exposure to cold external temperatures
Loss of water in cells throughout the plant
Low nutrient concentration in the soil near the roots
An increased amount of sunlight exposure
The stem and leaves of the plant in the diagram above are exhibiting which behavior?
Geo Tropism
Photo Tropism
AutoTropism
Gravitropism
Leaves are composed of vascular tissue that brings water in so that ground tissue can conduct photosynthesis. Based on this information, what level of organization describes leaves?
tissue
organ
organ system
organism
Plants are complex organisms that are composed of multiple layers of organization. Which of the following best represents the organization of the root system from most complex to least complex?
root system → phloem → root → cell
root system → cell → phloem → root
root system → root → phloem → cell
root system → root → cell → phloem
Which part of the plant above demonstrates the greatest amount of turgor pressure?
a
b
c
d
Mr. Hendrickson was out of town for a few days and when he returned, he noticed that his plant was very wilted. He watered the plant and put it in the sun. A few hours later, he noticed that it the leaves on the plant had perked up and looked fine again. The image shows the plants before and after the water and exposure to sunlight.
The plants needed to be outside so it could be affected by the gravity of the Earth.
The plants needed the water so the cells could expand and keep the plant upright.
The plants needed the water to help the leaves undergo photosynthesis.
The plants needed to be put in the sun so the sunlight could attract the plant.
Scientists on a space shuttle mission studying plant growth would probably see that the plants on the space shuttle do not grow in the same direction and pattern as those on Earth.
Scientists working in space would MOST LIKELY be studying the effects of which of the following on plant growth?
friction
wind
gravity
moon light
Billy orders a plant for his garden. When it was delivered, the roots and the plant stem were not growing straight out of the clay pot. Instead, the direction of their growth was in a 'sideways' direction. The diagram shows the direction the plant was growing when it was received by Billy.
Why is the most likely reason for the direction of the plant growth?
The plant lost turgor pressure and changed it's growth direction.
The plant was laid on it's side inside the package and geotropism caused the plant to change it's growth direction.
The plant found light through the sealed package and phototropism caused the plant to change it's direction of growth.
Plants normally grow in strange patterns until they reach a certain age.
The roots of the plant in the diagram above are exhibiting which behavior?
Phototropism
Geotropism/Gravitropism
Hydrotropism
Thigmotropism
Plant root tips have a layer of cells that function together to grow rapidly to allow the plant to increase the plant's ability to reach water and stabilize in the ground. Based on this information, what level of organization describes the plant root tips?
Tissue
Organ
Organism
Organ system
What is most likely to cause wilting in plants?
too much turgor pressure
lack of turgor pressure
