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Pre AP Biology -ECO 3.2 Types of Ecological Communities- MCQ Exam Style Questions -New Syllabus

Pre AP Biology -ECO 3.2 Types of Ecological Communities- FRQ Exam Style Questions – New Syllabus 2025-2026

Pre AP Biology -ECO 3.2 Types of Ecological Communities- FRQ Exam Style Questions – Pre AP Biology – per latest Pre AP Biology Syllabus.

Pre AP Biology – FRQ Exam Style Questions- All Topics

Question

Read these passages from the text and answer the questions that follow.
Terrestrial Biomes
Terrestrial biomes include all the land areas on Earth where organisms live. The distinguishing features of terrestrial biomes are determined mainly by climate. Terrestrial biomes include tundras, temperate forests and grasslands, chaparral, temperate and tropical deserts, and tropical forests and grasslands.
 
Terrestrial Biomes and Climate
Climate is the average weather in an area over a long period of time. Weather refers to the conditions of the atmosphere from day to day. Climate is generally described in terms of temperature and moisture. Temperature falls from the equator to the poles. Therefore, major temperature zones are based on latitude. They include tropical, temperate, and arctic zones (see figure below). However, other factors besides latitude may also influence temperature. For example, land near the ocean may have cooler summers and warmer winters than land farther inland. This is because water gains and loses heat more slowly than does land, and the water temperature influences the temperature on the coast. Temperature also falls from lower to higher altitudes. That’s why tropical zone mountaintops may be capped with snow.
In terms of moisture, climates can be classified as arid (dry), semi-arid, humid (wet), or semi-humid. The amount of moisture depends on both precipitation and evaporation. Precipitation increases moisture. Evaporation decreases moisture.
 
Climate and Plant Growth
Plants are the major producers in terrestrial biomes. They have five basic needs: air, warmth, sunlight, water, and nutrients. How well these needs are met in a given location depends on the growing season and soil quality, both of which are determined mainly by climate.
The growing season is the period of time each year when it is warm and wet enough for plants to grow. The growing season may last all year in a hot, wet climate but just a few months in a cooler or drier climate. Plants grow best in soil that contains plenty of nutrients and organic matter. Both are added to soil when plant litter and dead organisms decompose. Decomposition occurs too slowly in cold climates and too quickly in hot, wet climates for nutrients and organic matter to accumulate. Temperate climates usually have the best soil for plant growth.
 
Question:
1. What is a terrestrial biome? Give two examples.
2. What is the difference between climate and weather?
3. How do precipitation and evaporation affect climate?
4. How does climate determine plant growth?
5. What do plants need to grow? How are these needs affected by climate?

Most-appropriate topic codes (Pre-AP Biology 2021):

• TOPIC: ECO 3.2 — Types of Ecological Communities: Classification of terrestrial biomes by geography and abiotic factors like climate and soil — Questions 1, 4
• TOPIC: ECO 1.1 — Hydrologic Cycle: Understanding how water (precipitation/evaporation) cycles and supports life — Question 3
• TOPIC: ECO 2.1 — Population Structure: Abiotic factors (sunlight, nutrients, temperature) defining the niche and range of tolerance — Question 5
• TOPIC: ECO 1.2 — Carbon and Nutrient Cycles: Importance of nutrient cycling and decomposition for biological systems — Question 5
• Science Area of Focus: Emphasis on Analytical Reading and Writing: Extracting and synthesizing information from scientific texts — General context
▶️ Answer/Explanation
Detailed solution

1.
Terrestrial biomes include all the land areas on Earth where organisms live. Examples include tundras, temperate forests and grasslands, chaparral, temperate and tropical deserts, and tropical forests and grasslands .
Explanation: Terrestrial biomes are classified by geographic locations and the abiotic factors that shape the unique ecological communities. Two major abiotic factors that help define terrestrial biomes are climate (temperature, precipitation) and soil type.

2.
Climate is the average weather in an area over a long period of time, whereas weather refers to the conditions of the atmosphere from day to day.
Explanation: Climate represents the long-term patterns and statistical averages of moisture and temperature, while weather represents the immediate, daily state of the atmosphere.

3.
The amount of moisture depends on both precipitation and evaporation. Precipitation increases moisture, while evaporation decreases moisture.
Explanation: This balance determines the classification of climates (e.g., arid vs. humid). In the hydrologic cycle, water is transferred and stored, driven by energy from the sun .

4.
Climate determines the growing season and soil quality, which affect the five basic needs of plants: air, warmth, sunlight, water, and nutrients .
Explanation: Species have a range of tolerance for abiotic resources such as sunlight, nutrients, and temperature. These factors define the ecological niche and the productivity of the community .

5.
Plants grow best in soil that contains plenty of nutrients and organic matter, which are added when plant litter and dead organisms decompose. Decomposition rates are climate-dependent; temperate climates typically offer the most balanced environment for nutrient accumulation .
Explanation: Elements that are building blocks of macromolecules are transported from abiotic to biotic systems through nutrient cycles. Availability of resources like nitrates in soil can be a limiting factor for plant growth.

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