WorksheetsPlant Test
Total questions: 20
Worksheet time: 10mins
Most plants have hair-like cells called trichomes that project from the surface and help the plants in many ways. In some plants trichomes secrete toxic substances that most likely perform which function?
Absorb carbon dioxide
Reflect light off leaves
Protect against herbivorous insects
Reduce water loss from evaporation
A student conducted an investigation to study phototropism in grasses. The only difference
between the control group and the experimental group was light conditions. The control group
was provided full light, while the experimental group was shaded on one side. The diagrams show
the average heights and positions of blades of grass in the investigation.
Which statement best explains why the grass tips of the experimental group bent toward the light?
Water evaporated faster on the side of the plant having full light
The xylem in the root system absorbed more nutrients from the shaded side
The side facing the light has a greater chance of absorbing carbon dioxide from the atmosphere
Light sensors in the grass tips stimulated a hormone in the shoot system
Structures represented in the illustration below are found in the lower epidermis of a plant leaf. The illustration at right shows the response to a certain environmental condition.
The response represented in the illustration would most likely be caused by—
Little available water
A reduced supply of oxygen
Long periods of rainfall
High concentrations of glucose
Which of the following is true of plant transport?
Xylem moves glucose from the roots to the leaves
Xylem moves water from the leaves to the roots
Phloem moves water from the roots to the leaves
Phloem moves glucose from the leaves to the rest of the plant
What is the female reproductive structure of a flower?
Pistil
Anther
Filament
Stamen
Some students are instructed to put a celery stalk in a red dye solution for a lab activity. First the students carefully cut the bottom of the stalk with a scalpel. Then they put the stalk in the beaker with the solution and place the beaker on a shelf in the lab room. The next day they check the stalk and make observations. The students note that the leaves at the end of the stalk have changed color from green to red. The students cut across the celery stalk and use a hand lens to see that the small tube openings along the edge of the celery stalk are also red. The cross section is shown in the picture.
How do the plant systems work together to make this movement of liquid possible?
The roots absorb water and minerals and move them up to the stem, while the stem moves food produced in the leaves down to the roots in tiny tubes.
The roots anchor the plant in the soil, and the stem holds the leaves up.
The roots absorb their own water and minerals, while the stem absorbs its water and minerals through the leaves.
The roots lose water vapor to the soil, and the stem loses water vapor through the leaves.
Plant hormones serve as chemical messengers between cells and tissues. Auxin is a plant hormone that causes the cells on the shady side of a plant shoot to elongate. The response enabled by auxin is known as—
Gravitropism
Photosynthesis
Transpiration
Phototropism
The transfer of pollen, containing the sperm cells, to the female part of the flower is called_____; while ________occurs after a tube grows down from the pollen grain through the style to the ovary.
Seed dispersal, pollination
Germination, fertilization
Fertilization, pollination
Pollination, fertilization
Which of the following is NOT a function generally associated with roots?
Transport
Photosynthesis
Anchorage
Storage
What do phototropism and gravitropism enable plants to do?
Prevent invasion by insect colonies
Grow toward needed resources
Respond to stimuli aggressively
Defend themselves against herbivores
In living organisms, cells can be organized into tissues, tissues into organs, organs into systems, and systems work together to keep the organism alive. The 3 principal organs of seed plants, like conifers and flowering plants, are —
roots, leaves, and flowers
stems, fruits, and flowers
stems, roots, and leaves
stems, roots, and fruits
Leaves are part of a plant’s shoot system. The xylem tissues in leaves transports—
The bacteria needed for nitrogen fixation in root nodules
The water and minerals that are absorbed by the roots
The wax required to coat the surface of actively growing tissue
The oxygen that regulates the rate of carbohydrate production
Cytokinins are a class of plant hormones that help regulate growth by promoting cell division. Cytokinins are produced mainly in meristematic tissue, where most plant growth occurs. Which system carries cytokinins produced in the roots to the rest of the plant?
Vascular system
Reproductive system
Dermal system
None of these
The loss of water through stomata is called:
Translocation
Pressure Flow
Cohesion
Transpiration
When an upright plant is placed on its side, the:
plant dies
stem bends and grows downward
stem bends and grows upward
stem continues to develop horizontally
Carbon dioxide enters leaves of green plants through ____________.
Epidermis cells
The cuticle
Palisade cells
Stomata
What is the male reproductive structure of a flower?
Stamen
Stigma
Ovary
Pistil
Several structures work together to allow flowering plants to reproduce. The diagram shows a typical flower.
Which table correctly identifies the function of each structure or group of structures in the reproduction of the plant?
A
B
C
D
Plants called sundews have rounded green leaves with many hair-like structures. The ends of these structures contain enzymes in a sticky liquid that looks like nectar or moisture, as shown in the picture. The hairs do not react to dust or nonliving material but will bend inward when insects get caught in the sticky liquid. Sundews digest trapped insects over a period of a few days.
Based on this information, what functions do the specialized leaves of sundews perform?
Provide water to the plant and perform photosynthesis
Provide nutrients to the plant and respond to stimuli
Respond to stimuli and anchor the plant
Release pollen to insects and perform photosynthesis
F
G
H
J
