A Leaf and Starch Presence

Testing for Starch in a Leaf

A leaf is tested for the presence of starch. When is starch most likely to be present?

1) after rain in the morning

2) after several hours of darkness

3) first thing

4) after a long sunny day

Answer:

4) after a long sunny day.

Explanation:

Sunlight is needed by plants to undergo photosynthesis, so the answer is 4) after a long sunny day.

Hope this explanation helps.