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WorksheetsHorticulture Final fall 2025
Total questions: 97
Worksheet time: 49mins
Which of the following describes the correct order of taxonomic classification from broadest to most specific?
Species, Genus, Family, Order, Class, Phylum, Kingdom, Domain
Kingdom, Phylum, Class, Order, Family, Genus, Species
Domain, Kingdom, Phylum, Order, Class, Family, Genus, Species
Phylum, Kingdom, Class, Order, Family, Genus, Species
Which classification grouping would contain the most diverse range of plant species?
Genus
Family
Order
Kingdom
The scientific name for a plant, such as Rosa hybrida, indicates its:
Family and Species
Genus and Species
Order and Family
Class and Genus
Which plant structure is primarily responsible for anchoring the plant and absorbing water and nutrients?
Stem
Leaf
Flower
Root
The primary function of the plant stem is to:
Produce seeds
Absorb sunlight for photosynthesis
Transport water and nutrients throughout the plant
Attract pollinators
Which part of the flower typically contains the ovules that develop into seeds?
Petal
Stamen
Pistil (Ovary)
Sepal
The process by which plants convert light energy into chemical energy (sugars) is called:
Respiration
Transpiration
Photosynthesis
Germination
What are the two primary products of photosynthesis?
Carbon dioxide and water
Glucose and oxygen
Water and oxygen
Carbon dioxide and glucose
Transpiration in plants primarily involves the loss of:
Carbon dioxide gas
Oxygen gas
Water vapor
Mineral nutrients
The study of plant names and classification is known as:
Physiology
Anatomy
Nomenclature
Morphology
The term "xylem" refers to the plant tissue responsible for:
Transporting sugars
Transporting water and minerals from roots to leaves
Storing food
Producing flowers
What is the common name for the physiological process where plants take in oxygen and release carbon dioxide, especially at night?
Photosynthesis
Transpiration
Respiration
Absorption
Which of the following is an example of a herbaceous plant?
Oak tree
Rose bush
Tomato plant
Pine tree
Which of the following is an example of a woody plant?
Lettuce
Rose bush
Tomato plant
Sunflower
An annual plant completes its entire life cycle in:
More than two years
Exactly two years
One growing season
Less than one month
A perennial plant lives for:
Only one growing season
Exactly two years
More than two years
Only until it flowers once
Which characteristic is typical of a tropical plant?
Tolerance to freezing temperatures
Adaptation to long periods of drought
Requires consistently warm temperatures and high humidity
Grows best in cold, dry climates
What are some common signs of a healthy root system in a plant?
Dark, mushy roots
Brown, brittle roots
White or light-colored, firm roots
Roots growing above the soil surface
Which of the following is a common ornamental plant used in landscapes?
Corn
Wheat
Marigold
Soybean
A popular indoor plant known for its ability to tolerate low light conditions is the:
Sunflower
Cactus
Snake Plant (Sansevieria)
Orchid
A primary purpose of a greenhouse ventilation system is to:
Increase light intensity
Introduce pests
Control temperature and humidity
Reduce water evaporation
High humidity in a greenhouse can negatively affect plants by:
Increasing photosynthesis
Promoting fungal diseases
Decreasing plant growth rate
Improving pollination
Increased carbon dioxide (CO2) levels in a greenhouse can directly lead to:
Decreased water absorption
Enhanced photosynthesis
Reduced plant height
Increased pest problems
"Photoperiodism" refers to a plant's response to:
Light intensity
Light duration (day length)
Temperature fluctuations
Soil moisture
Plants that require long periods of darkness to flower are known as:
Long-day plants
Short-day plants
Day-neutral plants
Shade-loving plants
Which of the following best describes an "open environmental system" in horticulture?
A hydroponic system with no external inputs.
A sealed greenhouse with complete recycling of air and water.
An outdoor field where plants are exposed to natural environmental fluctuations.
A grow tent with filtered air circulation.
A closed environmental system (like some advanced hydroponics) aims to:
Maximize water loss
Minimize resource use and waste
Expose plants to maximum sunlight
Increase pest populations
An ideal growing medium should have:
High compaction and poor drainage
Good drainage, good aeration, and adequate water retention
High clay content and low organic matter
Exclusive use of garden soil
Which component is often added to potting mixes to improve drainage and aeration?
Clay
Perlite or vermiculite
Heavy topsoil
Silt
The "finger test" is used to determine:
Soil pH
Nutrient levels
Soil moisture level
Pest presence
Which watering method is best for promoting deep root growth and minimizing surface evaporation for established plants?
Frequent, shallow misting
Daily overhead watering
Deep, infrequent watering
Watering exclusively from a saucer below the pot
Nitrogen (N) is primarily responsible for promoting strong:
Root development
Flower production
Leafy, vegetative growth
Fruit ripening
Phosphorus (P) is crucial for:
Stem elongation
Flower and fruit development, and root growth
Leaf color
Disease resistance
Potassium (K) is vital for:
Photosynthesis efficiency and overall plant vigor
Nitrogen fixation
Preventing wilting
Increasing fruit size only
A soil test report indicates a very low pH. To raise the pH (make it more alkaline) for most plants, you would typically add:
Sulfur
Gypsum
Limestone
Ammonium sulfate
Which type of chemical is used to promote rooting in plant cuttings?
Herbicides
Fungicides
Rooting hormones (auxins)
Insecticides
Plant growth retardants are sometimes used in horticulture to:
Increase stem elongation
Produce taller plants
Keep plants more compact and manageable
Speed up flowering
Which of the following is considered a primary macronutrient needed in large quantities by plants?
Iron
Zinc
Calcium
Nitrogen
The term "cation exchange capacity" (CEC) in soil refers to its ability to:
Drain water quickly
Hold onto positively charged nutrient ions
Promote soil erosion
Encourage pest growth
What are common signs of overwatering a plant?
Wilting leaves that are dry and crispy
Yellowing leaves, stunted growth, and mushy roots
Dark green, healthy foliage
Rapid, vigorous new growth
What are common signs of an underwatered plant?
Yellowing, mushy leaves
Dark spots on leaves
Wilting leaves that are dry and crispy
Mushy roots
Which watering method delivers water directly to the root zone from below the pot?
Top watering
Bottom watering
Misting
Overhead irrigation
Why is good drainage essential for healthy plant roots in a container?
It makes the pot lighter.
It prevents water from standing around the roots, leading to rot.
It increases the soil pH.
It makes the plant grow taller.
When is generally the best time of day to water most outdoor plants?
Mid-day, when the sun is strongest
Late evening, right before sunset
Early morning, before the heat of the day
Any time, it doesn't matter
What is "leaching" in the context of watering?
Water evaporating from the soil surface.
Water flowing through the soil, carrying away excess salts and nutrients.
Water being absorbed by plant leaves.
Water turning into ice in the soil.
What are common signs of nitrogen deficiency in plants?
Purple discoloration of leaves
Yellowing of older leaves, especially between veins
Interveinal chlorosis (yellowing between veins) in new leaves
Stunted roots with no leaf symptoms
What are common signs of iron deficiency in plants?
Overall yellowing of older leaves
Interveinal chlorosis (yellowing between veins) in new leaves
Deep purple coloring of stems
Browning leaf tips
Which primary macronutrient is primarily responsible for overall plant vigor and disease resistance?
Nitrogen
Phosphorus
Potassium
Calcium
To raise soil pH, which of the following is most commonly applied?
Ammonium sulfate
Elemental sulfur
Ground limestone
Iron chelate
What is the main purpose of adding organic matter to soil?
To make the soil heavier
To improve soil structure, water retention, and nutrient availability
To kill beneficial soil organisms
To lower soil pH
Which of the following is a physical property of soil?
pH
Nutrient content
Texture
Microbial activity
The layer of soil most affected by plant roots and biological activity is the:
Subsoil
Substratum
Topsoil
Parent material
When evaluating soil samples, what can a bright-colored soil typically indicate about its drainage?
Poor drainage and low oxygen
Good drainage and good aeration
High clay content
High organic matter content
What does a dull-colored soil, especially with mottle-colored patterns, often suggest?
Excellent drainage and aeration
Poor drainage and periods of waterlogging
Very low organic matter
High sand content
The term "available soil moisture" refers to the water:
That is completely drained from the soil.
That plants can readily absorb from the soil.
Trapped so tightly by soil particles that plants cannot use it.
Found only in the air above the soil.
Which type of soil water is held by cohesive and adhesive forces against gravity and is primarily available to plants?
Gravitational water
Capillary water
Hygroscopic water
Runoff water
Which type of soil water is held so tightly by soil particles that it is generally unavailable for plant uptake?
Gravitational moisture
Capillary moisture
Hygroscopic moisture
Available moisture
When considering a soil profile, which process involves the downward movement of dissolved or suspended materials from one horizon to another?
Additions
Losses
Translocations (Eluviation/Illuviation)
Transformations
The "A horizon" of a soil profile is typically referred to as the:
Substratum
Subsoil
Topsoil
Parent material
What is the primary purpose of a soil survey report?
To list the types of plants growing in an area.
To provide information about soil types, characteristics, and land use suitability.
To predict weather patterns.
To record daily temperature fluctuations.
Which of the following is a direct environmental impact of soil erosion?
Increased soil fertility
Loss of topsoil and degradation of land
Improved water quality in nearby streams
Higher crop yields
How can excessive use of fertilizers for plant nutrients negatively impact the environment?
They increase soil organic matter.
They can lead to nutrient runoff and water pollution.
They reduce the need for irrigation.
They promote beneficial insect populations.
Which type of horticultural production is primarily characterized by growing plants directly in the ground over large areas for eventual harvesting or transplanting?
Greenhouse production
Nursery production (containerized)
Field production
Hydroponic production
When planning a horticultural crop project, which of the following is a crucial first step in determining market feasibility?
Immediately buying all necessary equipment.
Researching market demand and potential customers.
Planting as many crops as possible.
Ignoring transportation costs.
The primary purpose of a greenhouse bench is to:
Provide a place for workers to sit.
Elevate plants to optimize light exposure and airflow.
Store gardening tools.
Collect rainwater.
Selling plants directly to consumers at a farmers' market is an example of what type of marketing?
Wholesale marketing
Retail marketing
Brokerage marketing
Import marketing
A major challenge in packaging and shipping live horticultural products is:
Ensuring the package is brightly colored.
Preventing physical damage and maintaining plant health.
Making the package as heavy as possible.
Using only plastic packaging.
A benefit of wholesale marketing for a horticultural producer is:
Higher individual sale price per plant.
Direct interaction with the end consumer.
Selling large volumes of product to a single buyer.
More control over product display.
To maintain the quality of cut flowers during marketing, florists often:
Expose them to direct sunlight.
Keep them in a cool environment.
Allow them to dry out.
Place them near heating vents.
Which piece of equipment is essential for accurately measuring soil pH?
pH meter
Pruning shears
Soil probe
Watering can
When designing a strategy for vegetable production, "crop rotation" is used primarily to:
Prevent pest and disease buildup and improve soil fertility.
Plant the same crop in the same spot every year.
Increase weeding requirements.
Reduce the need for irrigation.
The concept of "hardening off" plants involves:
Gradually exposing tender plants to outdoor conditions before transplanting.
Giving plants more fertilizer to make them stronger.
Reducing light intensity for indoor plants.
Pruning plants severely to encourage new growth.
What is the primary purpose of pruning plants?
To improve plant shape, promote flowering/fruiting, or remove dead/diseased wood.
To encourage pest infestations.
To stop all new growth.
To make the plant completely dormant.
To overwinter tender perennial plants in a cold climate, a common practice is to:
Bring them indoors or provide protective covering.
Leave them exposed to the elements.
Water them heavily throughout the winter.
Fertilize them frequently in winter.
When harvesting fruits or vegetables, it is important to:
Harvest them at their peak ripeness for best quality.
Harvest them before they are fully mature to extend shelf life.
Handle them roughly to remove dirt.
Harvest all crops at the same time, regardless of maturity.
Which irrigation method is most suitable for crop production aimed at water conservation?
Flood irrigation
Drip irrigation
Overhead sprinklers
Watering during the hottest part of the day
Hydroponics is a method of growing plants:
Directly in soil with added nutrients.
In water enriched with dissolved mineral nutrients.
Using only natural rainfall.
Without any light.
A key challenge in hydroponic systems is:
Managing soil pH.
Preventing nutrient solution contamination and maintaining proper nutrient balance.
Finding enough sunlight.
Dealing with extreme drought conditions.
Which of the following describes a common method for producing new nursery plants from existing ones?
Harvesting only the fruit.
Taking cuttings from the parent plant.
Waiting for spontaneous mutations.
Burning the old plant.
When growing tree fruits, thinning of young fruits is often practiced to:
Increase the total number of fruits.
Improve the size and quality of the remaining fruits.
Accelerate tree growth.
Deter pests.
Which common turfgrass species would you recommend for a high-traffic athletic field in a temperate climate?
St. Augustinegrass
Kentucky Bluegrass
Zoysiagrass
Bermuda Grass
What is the importance of proper sanitation in a horticultural setting?
It makes the greenhouse look nicer.
It helps prevent the spread of diseases and pests.
It makes plants grow faster.
It reduces the need for fertilizer.
Which of the following is a common plant pest that sucks sap from plants and often leaves a sticky residue (honeydew)?
Ladybug
Aphid
Earthworm
Bumblebee
Plant diseases caused by fungi are often characterized by symptoms such as:
Sudden wilting of the entire plant.
Powdery mildew, rust spots, or root rot.
Bright yellow leaves with green veins.
Very rapid, uncontrolled growth.
Which of the following is a common bacterial plant disease?
Apple Scab
Fire Blight
Powdery Mildew
Cedar-Apple Rust
A major advantage of using biological control for pest management is:
It is always faster than chemical sprays.
It introduces beneficial organisms that prey on pests, reducing chemical use.
It is effective against all types of pests.
It is very expensive and difficult to implement.
Before applying any pesticide, the most important step for safety is to:
Mix it with water until it looks clear.
Read and follow the product label instructions carefully.
Apply it when it's windy.
Avoid wearing protective clothing.
If a pesticide gets on your skin, the immediate first aid response should typically be to:
Ignore it, it will dry.
Wash the affected area thoroughly with soap and water.
Apply more pesticide to dilute it.
Rub it vigorously.
Herbicides that are "selective" are designed to:
Kill all plants indiscriminately.
Kill only certain types of plants (e.g., broadleaf weeds but not grasses).
Promote plant growth.
Kill insects on plants.
Pre-emergent herbicides are applied to:
Prevent weed seeds from germinating.
Kill weeds that have already sprouted.
Encourage faster plant growth.
Control insect pests.
The Environmental Protection Agency (EPA) regulates pesticides in the United States primarily to:
Protect human health and the environment.
Increase their effectiveness.
Promote pesticide sales.
Reduce agricultural yields.
Which of the following is a key principle of Integrated Pest Management (IPM)?
Use a combination of pest control methods, minimizing environmental impact.
Always apply the strongest chemical pesticide available.
Eradicate all insects from the environment.
Rely solely on natural predators.
An IPM strategy would likely prioritize which of the following before resorting to chemical sprays?
Regular scouting for pests and cultural controls.
Applying pesticides on a fixed schedule.
Ignoring small pest populations.
Using broad-spectrum insecticides only.
Taking a stem cutting from a plant to grow a new plant is an example of what type of propagation?
Asexual
Sexual
Genetic
Seed
"Stratification" is a technique used to break seed dormancy by:
Exposing seeds to a period of cold, moist conditions.
Soaking seeds in hot water.
Keeping seeds in total darkness.
Applying a strong chemical fertilizer.
To ensure poinsettias are ready for sale by December, a propagation schedule must account for their specific needs, including:
Long-day photoperiod.
Short-day photoperiod for flowering.
Deep dormancy in summer.
Continuous warm temperatures year-round.
A "germination test" is performed to determine:
The color of the seeds.
The percentage of seeds in a batch that will sprout.
The age of the seeds.
The weight of the seeds.
