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WorksheetsUnit 9: Plants Test Review
Total questions: 15
Worksheet time: 9mins
Which structure labeled on this diagram regulates the rate at which photosynthesis occurs?
cuticle
xylem
vacuole
guard cell
The celery stalk shown here was placed in a cup of water with red food dye. Why did the leaves turn red and the base of the stalk appear to have red dots?
roots absorb water and minerals which is moved up to the leaves by xylem; phloem moves glucose produced in the leaves down to the roots
xylem in the leaves moved water down to the roots; phloem in the roots moved glucose up to the leaves
the stem absorbed the water and then vascular tissues moved it around the plant
the leaves absorbed the water and it was released through the stem
Transport of sugars down from the leaves to the roots is achieved through the ___.
xylem
phloem
stoma
cuticle
Some plants secrete toxic substances. Why is this a helpful adaptation?
It is a defense mechanism to protect against being eaten.
It is a random genetic mutation that does not serve a purpose.
This attracts herbivores and makes it more likely that the plant will be eaten.
There is no benefit or harm to any organism with this adaptation.
The image here shows a thigmotropism response present in some plants. Why might this be beneficial to the plant?
protection from water loss
improved absorption of sunlight
protection from herbivorous animals
improved release of oxygen from stomata
Why are guard cells important?
absorption of sunlight
release of excess glucose
regulating the rate of water loss
transport of water and minerals
Which tissue is responsible for transporting water and minerals up from the roots?
xylem
phloem
stomata
root hairs
Guard cells would close the stoma when which environmental condition is present?
limited water in the soil
excess rainfall
prolonged periods of sunlight
prolonged periods of darkness
Auxin will accumulate in plant cells on the shaded side of a stem, causing them to lengthen in an attempt to make the stem bend and grow towards light. This growth response is known as ___.
thigmotropism
gravitropism
phototropism
photoperiodism
Just like animals, plants have hormones that control their growth and response to the environment. Examples of these plant hormones include auxin, ethylene, and cytokinin. These hormones are transported in the plant by which tissues?
vascular tissues
epithelial tissues
stomata
root hairs
Match the part of a flower to its function
egg production and embryo development
production of pollen
attraction of pollinators
What is being demonstrated in this image?
growth towards a light source
growth based on gravity's pull on the plant
the plant is dying
there is no connection between the light and the plant
Why are root hairs important to a plant?
increased surface area for improved water and nutrient absorption
increased surface area for decreased water and nutrient absorption
to make the roots fuzzy and better able to function as an anchor
decreased surface area and increased absorption of water and nutrients
Select all that are growth responses in plants.
phototropism (growth toward light)
gravitropism (growth based on gravity)
thigmotropism (growth in response to touch)
colortropism (growth in response to colors)
Which organelle is NOT present in the root cells of plants?
nucleus
chloroplast
vacuole
cell wall
