Question

1. where does photosynthesis happen in a plant cell?

a. nucleus
b. chloroplast
c. mitochondria
d. cell wall

1. which of these do plants need for photosynthesis?

a. water, sunlight, carbon dioxide
b. food, air, sound
c. soil, sugar, animals
d. rocks, wind, salt

Explanation:

• Question 4: Chloroplasts contain chlorophyll which captures light energy for photosynthesis. The nucleus controls cell activities, mitochondria are for cellular respiration, and the cell wall provides structure.
• Question 5: The photosynthesis equation is \(6CO_2 + 6H_2O+light\ energy

ightarrow C_6H_{12}O_6 + 6O_2\). So plants need water, sunlight, and carbon dioxide. Other options have substances not involved in the core photosynthesis process.

Answer:

1. B. Chloroplast
2. A. Water, sunlight, carbon dioxide