Algonquin College Health Program Assessment (AC-HPAT) Practice Exam

Which process is vital for the growth of plants as a result of carbon dioxide intake?

1. Transpiration

2. Photosynthesis

3. Respiration

4. Pollination

The correct answer is: Photosynthesis

Photosynthesis is the process through which plants convert carbon dioxide and water into glucose and oxygen using sunlight. This process is critical for plant growth because it provides the necessary energy and organic compounds that plants use to build their tissues and sustain their metabolic functions. During photosynthesis, chlorophyll in the plant cells captures light energy, enabling the conversion of carbon dioxide from the atmosphere and water from the soil into sugar (a form of stored energy) and oxygen, which is released as a byproduct. Transpiration is the process of water movement through a plant and its evaporation from aerial parts, primarily leaves. While it plays a role in nutrient uptake and maintaining plant structure, it does not involve the synthesis of food or energy. Respiration is a process where plants, like all living organisms, break down glucose in the presence of oxygen to produce energy (ATP). However, this process does not directly contribute to plant growth through carbon dioxide intake; rather, it utilizes the glucose produced during photosynthesis. Pollination refers to the transfer of pollen from male to female flower parts, which is essential for reproduction in flowering plants. While pollination is critical for producing seeds and fruit, it does not involve the intake of carbon dioxide for growth. Thus, photosynthesis stands