Question

question 1

the raw materials used by green plants for photosynthesis are ___.

• water and carbon dioxide
• glucose and carbon dioxide
• water and oxygen
• water and glucose

question 2

algae and multicellular plants are autotrophs because they ___.

• decompose dead organisms
• absorb nutrients from soil
• capture sunlight to produce sugars
• break down starches to glucose

Explanation:

Identify raw materials of photosynthesis

The chemical equation for photosynthesis is:

$$6\text{CO}_2 + 6\text{H}_2\text{O} \xrightarrow{\text{light}} \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2$$

The reactants (raw materials) are carbon dioxide and water.

Define autotrophic nutrition

Autotrophs are organisms that produce their own food using light, water, carbon dioxide, or other chemicals. Green plants and algae capture sunlight to synthesize sugars (glucose) via photosynthesis.

Answer:

Question 1

• water and carbon dioxide (Correct answer)
• glucose and carbon dioxide
• water and oxygen
• water and glucose

Question 2

• decompose dead organisms
• absorb nutrients from soil
• capture sunlight to produce sugars (Correct answer)
• break down starches to glucose