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WorksheetsPlant Structures and Tropisms
Total questions: 50
Worksheet time: 25mins
Name
Class
Date
1.
Tony wanted to see if he could make the roots of a plant grow up instead of down. After several tries, he found that the roots always grew down. Nothing he or his teacher did made the roots grow up. What keeps the roots from growing up?
a)
The roots need water.
b)
Sunlight hits the plants.
c)
Gravity pulls on the roots.
d)
There is plant food in the soil.
2.
This is a survival technique where an organism, usually a plant, is capable of directed physical movement or growth in response to a specific stimulus; such as light, gravity, water, or contact.What is the survival technique described above that is used by plants?
a)
locomotion
b)
migration
c)
pseudopodia
d)
tropism
3.
Tropism is a biological phenomenon where an organism, usually a plant, is capable of directed physical movement or growth in response to a specific stimulus. What is the term for a plant's movement or growth in response to gravity?
a)
geotropism
b)
hydrotropism
c)
phototropism
d)
thigmotropism
4.
Seasonal changes bring about scenes like this one. Plant cells respond to changes in _________________ and as a result, photosynthesis slows and leaves change color.
a)
day length and available oxygen
b)
carbon dioxide and glucose levels
c)
light intensity and temperature change
d)
available oxygen and temperature change
5.
Mr. Walker plants a new plant next to a tall tree in his yard. It is partly in the sun, but is mostly in the shade. He notices that it is growing with all of its leaves on one side. Why is the plant growing this way?
a)
It's dying
b)
It's trying to get sunlight
c)
It's trying to stay in the shade
d)
It wants to be closer to the tree
6.
The plants growing high in the tree canopy send out roots. The roots are searching for water vapor in the humid air of the forest. This response that helps aerial plants find water is called
a)
germination
b)
hydrotropism
c)
phototropism
d)
thigmotropism
7.
Which statement describes how plants respond to heat?
a)
Leaves bud in warm weather.
b)
Roots grow upward in hot soil.
c)
Petals change shape in hot air.
d)
Stems bend away from warm areas.
8.
The days are getting shorter and colder. These trees are responding to the change. Their leaves change color and will soon fall off. Losing leaves during the winter is the response to the external environment called
a)
dormancy
b)
hibernation
c)
hydrotropism
d)
phototropism
9.
In nature, plant roots grow down, and plant stems grow up. For a class experiment, a teacher plants a seed in an upside-down pot. The pot hangs from the ceiling. Soil cannot fall from the pot. What happens to the stem of a plant that is grown upside down?
a)
The stem will not grow at all.
b)
The stem will grow out the hole and then up.
c)
The stem will grow out the hole and then down.
d)
The stem will grow through the dirt by the roots.
10.
Sunflowers seem to follow the path of the sun as it travels across the sky during the day. Plants bending toward or following light is a response called
a)
hydrotropism
b)
photosynthesis
c)
phototropism
d)
thigmotropism
11.
The bee is pollinating the flower. This is an important step in the ____________ of flowering plants.
a)
speciation
b)
regeneration
c)
sexual reproduction
d)
asexual reproduction
12.
Both the euglena and paramecium seen here have
a)
chlorophyll and are producers.
b)
projections that help them move.
c)
specialized cells to detect light.
d)
a macronucleus and a micronucleus.
13.
Farmer Bob decides to use a compound pulley to raise a box up to the top of his barn. What is the purpose of using a simple machine in this case?
a)
to reduce the amount of friction
b)
to reduce the distance the box has to travel
c)
to reduce the amount of work needed to lift the box
d)
to reduce the amount of force needed to lift the box
14.
The heat transfer depicted in the image is MOST likely
a)
circulatio
b)
conduction
c)
convection
d)
radiation
15.
Which would have the GREATEST effect on the rate of photosynthesis in a plant?
a)
oxygen level
b)
light intensity
c)
sugar concentration
d)
starch concentration
16.
Mr. Sang grew a seed inside a clear, plastic bag. He taped the bag to a piece of cardboard. After the roots had grown about 2 inches, he turned the cardboard 90 degrees. Now the stem and roots of the plant were sideways. He left the plant to grow for 2 more weeks. When he took the plant out, it looked like this. What made the plant grow this way?
a)
Being turned made the roots keep growing sideways.
b)
Gravity made the roots grow down when the plant was turned.
c)
Being grown in a plastic bag made the roots grow the wrong way.
d)
Light made the roots change direction when the plant was turned.
17.
Mina observed the flowers of a plant called a moon flower. These plants have flowers that open and close. She wrote what she saw in a table. Using the information in the chart, what makes the flowers open and close?
a)
gravity
b)
heat
c)
light
d)
water
18.
Which part of a tree always grows down because of gravity?
a)
leaves
b)
flower
c)
stem
d)
roots
19.
This plant needs to grow high up in the canopy of the rainforest. It needs support as it moves up the stems and branches of larger trees. The tendrils here know when to cling to their support. This response by the climbing plant is called
a)
gravitropism
b)
hydrotropism
c)
phototropism
d)
thigmotropism
20.
Max did an experiment. He planted and observed flower bulbs. He planted three bulbs in a tray and placed them in the refrigerator. He planted three more bulbs in another tray and placed them in a warm, heated room. Compared to the bulbs in the refrigerator, what changes will Max most likely observe in the bulbs in the warm room?
a)
Their stems will grow downward.
b)
Their leaves will grow more quickly.
c)
Their flowers will bloom more slowly.
d)
Their roots will grow up toward light.
21.
The formation of hurricanes, storms, and other weather events require energy. The original energy source for all of these events is which type of energy?
a)
wind
b)
solar
c)
nuclear fission
d)
geothermal
22.
What is the dependent variable in the experiment shown?
a)
death rate
b)
mass of plant
c)
number of plant
d)
amount of fertilizer
23.
Kevin decides to find out which fertilizer is best for tomatoes. He pots up three plants, all with the same soil, giving one no fertilizer, giving the second type A fertilizer, and giving the third type B fertilizer.In this experiment, what is the control, or Kevin's standard for comparison?
a)
The plant the got soil.
b)
The plant that got no fertilizer.
c)
The plant that got type A fertilizer.
d)
The plant that got type B fertilizer.
24.
Students carry out an experiment to test how white button mushrooms grow best. They begin with identical trays that contain straw, wood chips, and compost, as well as the roots that will form the mushroom caps. The students’ experiment and results are described in the table. Which statement BEST describes the students’ results?
a)
Mushrooms grow better at the cooler temperature.
b)
Mushrooms grow better at the warmer temperature.
c)
Mushrooms grow better when exposed to light for longer periods.
d)
Mushrooms grow better when exposed to light for shorter periods.
25.
A teacher rubbed a match against a piece of sandpaper. The match started to burn. Which statement best describes the energy changes that occurred?
a)
A The chemical energy stored in the match changed to thermal energy and light energy.
b)
B The thermal energy stored in the match changed to light energy and chemical energy.
c)
C The light energy and thermal energy stored in the match changed to mechanical energy.
d)
D The light energy and thermal energy stored in the match changed to chemical energy.
26.
Black walnut trees produce a nontoxic chemical that becomes highly toxic when it is exposed to air or soil. How does this chemical help black walnut trees compete protect themselves from plants growing nearby or animals in the soil?
a)
By attracting herbivores to the other plants
b)
By poisoning animals or plants nearby.
c)
By increasing the photosynthesis rates in the other plants
d)
By limiting the amount of water available to the other plants
27.
What is one condition that is necessary for a hurricane to form?
a)
warm ocean water
b)
a strong cold front
c)
cold ocean water
d)
a strong warm front
28.
In which kingdom should this organism be classified?
a)
fungi
b)
eubacteria
c)
plantae
d)
animalia
29.
Which activities on the list are examples of the use of mechanical energy?
a)
Activities 1, 4, and 6
b)
Activities 2, 4, and 5
c)
Activities 1 and 2
d)
Activities 3, 5, and 6
30.
Which of these correctly describes the energy that makes the carousel turn?
a)
Heat from the candle produces currents of warm air.
b)
Heat from the candle produces currents of cold air.
c)
Light from the candle produces mechanical energy.
d)
Light from the candle produces wind currents.
31.
Many flowering plants have very colorful petals like the lily seen here. What is the main purpose of these colorful petals?
a)
to protect the plant from predators
b)
to capture sunlight for photosynthesis
c)
to distract birds from eating the seeds
d)
to attract insects that pollinate the flower
32.
The foxglove plant, seen in the illustration, produces very toxic chemicals that can cause serious illness and death in any organisms that eats the plant. Why do scientists think the foxglove plant evolved such powerful poisons?
a)
The poisons function to kill invading bacteria and other pathogens that may harm the plant.
b)
The poisons maximize the efficiency of the photosynthetic process, allowing the plant to make more food.
c)
The poisons discourage any animal from eating the plant, preventing damage to the plant from herbivores.
d)
Poisons are likely to be the product of genetic mutations in the DNA of the plant and do not have any useful function.
33.
If a pair of organisms are capable of producing fertile offspring in nature, they must belong to the same
a)
class
b)
kingdom
c)
population
d)
species
34.
The barometer has changed from 1040 to 1021. What type of weather would you predict is coming in the next couple of days?
a)
fair
b)
rainy
c)
sunny
d)
windy
35.
Cumulonimbus clouds are associated with what type of front?
a)
warm
b)
cold
c)
stationary
d)
occluded
36.
What type of energy is used to make the turbines spin in this type of dam?
a)
light
b)
themal
c)
sound
d)
mechanical
37.
Which of these is the best conductor of electricity?
a)
glass rod
b)
cotton string
c)
plastic tubing
d)
copper penny
38.
In addition to mechanical energy, which of these is produced as electric current passes through the circuit of this fan?
a)
heat
b)
mass
c)
light
d)
water vapor
39.
Which organism obtains energy without depending on another organism?
a)
oak tree
b)
mushroom
c)
cottontail rabbit
d)
mountain lion
40.
The light bulb does not glow. Which statement explains this observation?
a)
The battery is not charged.
b)
The lightbulb is not part of a complete circuit.
c)
The circuit does not have a switch.
d)
The bell uses most of the energy from the battery.
41.
Apples and other fruit fall from trees and are eaten by animals. What advantage does fruit provide for the seeds inside?
a)
The fruit protect the seed from water.
b)
The fruit provides the seeds the nutrition they need to grow.
c)
The fruit makes the seeds less appealing to animals and prevents them from being eaten.
d)
The fruit makes the seeds appealing to the animals who disperse the seeds in their waste.
42.
Cacti and succulents can survive in the desert MOST LIKELY because they both...
a)
need direct sun.
b)
can store water.
c)
have long taproots.
d)
have chlorophyll for photosynthesis.
43.
Identify structure G on the flower below.
a)
Petals
b)
Stamen
c)
Pistil
d)
Stem
44.
Identify structure J on the flower below.
a)
Petals
b)
Stamen
c)
Pistil
d)
Stem
45.
Identify which part of the flower is responsible for making pollen?
a)
A
b)
H
c)
K
d)
N
46.
Identify which part of the flower is sticky and collects pollen grains off of pollinators ?
a)
A
b)
H
c)
K
d)
N
47.
This tree is found in hot, tropical areas where there are many large, grazing animals. What is one positive reason why this tree has developed thorns on the bark?
a)
It is a type of camouflage.
b)
Keeps monkeys from climbing in it.
c)
Protects from damage by large animals.
d)
Prevents water loss during hot weather.
48.
The structure that holds up the plant, transports food and water, and can also store food.
a)
stamen
b)
style
c)
stigma
d)
stem
49.
The place in plants where photosynthesis, respiration, and transpiration occurs.
a)
stems
b)
leaves
c)
roots
d)
flowers
50.
Roots with several main branches off that form a root mass are called ___________. Grass, corn and some trees are examples.
a)
taproot
b)
fibrous root
c)
phloem root
d)
brown root
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