Bench Mark 3

The laboratory setup represented below was used to investigate the effect of light on aquatic plants. Equal amounts of a green water plant were placed in beakers with gas collecting tubes. The beakers were placed in a temperature-controlled environment. The light source was placed at different distances from the beakers. After an hour, the amount of gas collected from the plants in each tube was measured and recorded in a data table. What experiment could we conduct to further our understanding of photosynthesis based on this experiment?

Change the color of lights used in the experiment

Green Light is reflected by a pigment in plants called...

Chlorophyll

The laboratory setup represented below was used to investigate the effect of light on aquatic plants. Equal amounts of a green water plant were placed in beakers with gas collecting tubes. The beakers were placed in a temperature-controlled environment. The light source was placed at different distances from the beakers. After an hour, the amount of gas collected from the plants in each tube was measured and recorded in a data table. What gas was produced by the plants and collected in the tube?

Oxygen

Which of the following processes adds oxygen to the atmosphere?

Photosynthesis

Based on the cycle of photosynthesis, what would be considered the ultimate source of energy for all living things on Earth?

The Sun

Some sea slugs store chloroplasts obtained from algae they have ingested. The chloroplasts continue to carry out photosynthesis within the slugs. What advantage would this activity be to these sea slugs?

The slug with chloroplasts can make some of their own food.

In the 1660s, Flemish physician Jan van Helmont grew a small willow tree in a pot of soil. He added only water to the pot. At the end of five years, he found that the tree had gained 75 kilograms, but there was very little change in the weight of the soil. Van Helmont concluded that the plant gained weight directly from the water. We now know that this conclusion is only partially correct because, in addition to water, photosynthesis also requires...

carbon dioxide from the atmosphere

The model below represents some of the events that take place in a plant cell. The letters X, Y, and Z most likely represent

carbon dioxide, light, and water

In which organelle of a leaf cell does photosynthesis occur?

chloroplast

What does the process of photosynthesis produce?

glucose

The model below represents some of the events that take place in a plant cell. Which process is best illustrated by the model?

photosynthesis

Photosynthesis transforms molecules of water and carbon dioxide into molecules of

sugar and oxygen