Ecology Unit Test for 5th semester conducted by Miss Riwa

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