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WorksheetsEcology Unit Test for 5th semester conducted by Miss Riwa
Total questions: 20
Worksheet time: 20mins
How does light intensity affect plant growth?
Plants grow better in complete darkness.
Higher light intensity always leads to faster growth.
Light intensity affects plant growth by influencing the rate of photosynthesis; optimal levels promote growth, while too little or too much light can hinder it.
Light intensity has no effect on plant growth.
What role does fire play in shaping plant communities?
Fire promotes growth, controlling species, and maintaining diversity.
Fire only benefits a single species of plant.
Fire destroys all plant life completely.
Fire has no impact on plant growth or diversity.
Which of the following has a correct meaning for
edaphic factors?
Edaphic factors are the biological interactions among species.
Edaphic factors refer to the water availability in an ecosystem.
Edaphic factors are primarily related to climate conditions.
Edaphic factors are soil characteristics that impact vegetation by influencing growth conditions and species distribution.
How do soil types influence plant distribution?
Soil types determine the availability of nutrients and water, influencing which plants can thrive in a given area.
Soil types only affect the nutrients availability to the plants
All plants can grow in any soil type.
Soil types have no effect on plant growth.
What is the significance of moisture availability in plant distribution?
Moisture levels only affect animal populations, not plants.
Moisture availability determines the types of plants that can thrive in a given area, influencing biodiversity and ecosystem structure.
All plants require the same amount of moisture to survive.
Moisture availability has no impact on plant growth.
How do climatic conditions interact with physiographic factors?
Climatic conditions interact with physiographic factors by influencing vegetation, soil formation, and local microclimates, which together shape ecosystems and land use.
Vegetation does not change with varying climatic conditions.
Climatic conditions have no effect on soil formation.
Physiographic factors are solely determined by human activity.
Which of the following associate with the relationship between plant distribution and elevation ?
Soil conditions are the only factor influencing plant distribution.
Plant distribution varies with elevation due to changes in climate, temperature, and soil conditions.
Plant distribution is unaffected by elevation changes.
Higher elevations always have more plant species.
Soil organic matter (SOM) influence plant distribution in terrestrial ecosystems by
It increases soil pH, making it more alkaline
It improves water retention and nutrient availability.
It decreases microbial activity in the soil
It reduces the soil's ability to hold carbon.
Which of the following best describes the term "aspect of slopes" in ecology?
The steepness or degree of incline of a slope.
The direction that a slope faces
The length of a slope from the base to the summit.
The type of vegetation found on a slope
Which of the following adaptations is NOT typically found in the anatomical structure of hydrophytes?
Aerenchyma tissue for buoyancy
Thick cuticle to reduce water loss
Large aerenchyma cells for gas exchange
Reduced root systems for anchorage
What is the primary function of aerenchyma tissue in hydrophytes?
Water absorption
Nutrient storage
Gas exchange and buoyancy
Photosynthesis
Which of the following adaptations is NOT commonly found in xerophytes to reduce water loss in arid environments?
Thick cuticle on leaves
Deep root systems
Reduced number of stomata
High leaf surface area
Which of the following is adopted by xerophytic plants?
C3 photosynthesis
C4 photosynthesis
CAM photosynthesis
Both C4 and CAM
How do epiphytes obtain nutrients?
By photosynthesis only
By absorbing moisture and nutrients from the air and debris around them
By parasitizing the host plant
By rooting into the soil
In which type of environment are epiphytes most commonly found?
Rain forest
Desert
Grassland
Tundra
The sponge like tissue found in the roots of epiphytes that help in absorption and storage of atmospheric moisture is called (a)
Pneumatophores are adapted to which of the following conditions?
Dry soil
High altitude
Cold climate
High salinity and waterlogged
Which of the following functions is primarily performed by the salt glands found in roots of halophytes?
Excretion of excess salt
Storage of carbohydrates
Absorption of nutrients
Photosynthesis
Which soil texture is known for having the highest water retention capacity?
Sandy Soil
Loamy soil
Silt soil
Clayey soil
What is the typical pH range for most crops to grow optimally?
4.5 to 5.5
7.0 to 8.5
5.5 to 7.0
8.5 to 9.5
