Plant Biology Worksheet

Growing 100 identical plants in the same environment, but only watering half of them allows for a direct comparison of growth due to water availability, clearly demonstrating the necessity of water for proper plant growth.

The observation that certain plants can be grown successfully in water alone directly supports the claim that soil is not essential for plant growth, demonstrating that plants can thrive without soil.

Photosynthesis is the process by which plants convert sunlight into food energy, using carbon dioxide and water to produce glucose and oxygen. This makes photosynthesis the correct answer.

The leaf is the primary plant structure responsible for capturing sunlight through photosynthesis, allowing the plant to produce food. Flowers, roots, and stems serve different functions and do not primarily capture sunlight.

When the plant is moved, it will receive light from a different angle, causing it to grow towards the light source. This change in light direction will most likely alter the direction in which the plant grows.

A plant's stem acts as a delivery system, transporting water and nutrients from the roots to the leaves and flowers, similar to how a delivery system moves resources between floors in a building.

The energy source for nearly all living organisms can ultimately be traced back to the Sun, as it drives photosynthesis in plants, which are the foundation of most food chains.

Decomposers play a vital role in ecosystems by breaking down deceased organisms, which recycles nutrients back into the environment, supporting new plant growth and maintaining soil health.

The correct choice shows energy flow starting from cattails (producers) to crickets (primary consumers), then to shrews (secondary consumers), and finally to hawks (tertiary consumers), accurately representing the wetland food chain.

In a grassland food web, producers are organisms that create their own food through photosynthesis. Prairie grass is a plant that performs this function, while deer, squirrels, and field mice are consumers.