A scientist plants seedlings in different conditions to demonstrate how plants respond to their environment. Which of these observations provides evidence of gravitropism?
a
Seedlings planted in containers that are tipped over sideways grow sideways.
b
Seedlings planted in containers that are tipped over sideways extend their roots downward.
c
Seedlings planted near a stick wrap around the stick.
d
Seedlings planted away from a source of sunlight grow toward the light.
Question 2 (1 point)
How do tropisms help plants survive?
a
Plants grow together with other plants.
b
Plants grow toward things they need.
c
Plants create their own food using chlorophyll.
d
Plants limit their needs in harsh conditions.
Question 3 (1 point)
Which processes do plants and animals share in common?
a
photosynthesis
b
absorption of water
c
cellular respiration
d
transpiration
Question 4 (1 point)
What is the name of the process by which plants take in sunlight, carbon dioxide, and water, allowing them to make sugar and oxygen?
a
Photosynthesis
b
Transpiration
c
Absorption
d
Respiration
Question 5 (1 point)
Some plants have leaves that are poisonous to some animals. Which kind of adaptation is this?
a
reproduction
b
survival
c
respiration
d
defense
Question 6 (1 point)
Which component is found in both vascular and nonvascular plants?
a
roots
b
leaves
c
chlorophyll
d
stems
Question 7 (1 point)
A plant is placed near a window. Instead of growing straight up, the plant grows toward the window. What is this plant demonstrating?
a
dormancy
b
thigmotropism
c
gravitropism
d
phototropism
Question 8 (1 point)
What is xylem?
a
tube-like structures that move water through vascular plants
b
tube-like structures that move food through nonvascular plants
c
tube-like structures that move water through nonvascular plants
d
tube-like structures that move food through vascular plants
Question 9 (1 point)
Which issue could cause a plant to have too little water?
a
not enough photosynthesis
b
not enough photosynthesis
c
too much transpiration
d
too much respiration
Question 10 (1 point)
In which part of a flowering plant does photosynthesis occur?
a
flower
b
leaf
c
stamen
d
root
Question 11 (1 point)
Pole beans need something to grow around and up. Which kind of stimuli can encourage this type of growth?
a
touch
b
gravity
c
light
d
water
Question 12 (1 point)
The stem of a plant is experiencing phototropism. Which statement correctly describes the plant’s response?
a
The stem moves toward the light for better photosynthesis.
b
The stem grows upward because larger cells are growing.
c
The stem moves away from the light for better photosynthesis.
d
The stem bends to the sides because there are smaller cells on sides.
Question 13 (1 point)
Which adaptation in a berry plant is for reproduction?
a
flowers on the plant
b
thorns on the stem
c
sugar in the berries
d
chlorophyll in the leaves
Question 14 (1 point)
A plant is observed to have deep roots and tendrils that wrap around objects. Which pair of tropisms correctly describe these responses?
a
hydrotropism and thigmotropism
b
phototropism and thigmotropism
c
geotropism and phototropism
d
hydrotropism and geotropism
Question 15 (1 point)
Which condition is most likely to cause a plant to respond with dormancy?
a
being exposed to cold temperatures
b
growing by nearby water
c
growing in limited sunlight
d
being touched by a stick or branch
Question 16 (1 point)
The stem of a plant is growing upward while the roots grow downward. Which of these stimuli correctly describes the response of the plant?
a
touch
b
gravity
c
light
d
temperature
Question 17 (1 point)
Some plants have sugar in their roots. How does this adaptation help with survival?
a
Having the sugar under the ground keeps animals from finding and eating it.
b
The sugar is used to create new plants.
c
The sugar attracts animals to eat the roots.
d
The sugar can help the plant survive by storing energy.
d
The sugar can help the plant survive by storing energy.