Question

assignment: unit 4: quiz
questions
ch04.05

1. green plants cannot live without light because ______.

a. they need light to breathe
b. light helps to warm them to the optimum temperature for growth
c. it is necessary for the manufacture of food
d. none of the above
6.
7.
8.
9.
10.

Explanation:

Green plants perform photosynthesis to make food, and light is essential for this process (photosynthesis). Option a is incorrect as plants "breathe" (respire) without light too. Option b is not the main reason plants need light. So the correct reason is that light is necessary for manufacturing food (photosynthesis).

Answer:

c. It is necessary for the manufacture of food