Question

for questions 1 and 2, refer to the following paragraph and table. valerie designed and conducted an experiment on potato plants, which are common houseplants. her hypothesis is that the direction of light will affect the growth pattern of a potato plant. to test the hypothesis, she sets up two test groups of potato plants and observes them three weeks later. the table summarizes the test groups and observations. 1. what are the roles of the two test groups in this investigation? test group growth conditions observations 1 light source is only on the side of the plant stems and leaves are bent toward the light 2 light source comes from all directions stems and leaves are not bent a both are experimental groups, and each individually shows the effect of the direction of light (c) both are control groups, but only test group 1 shows the effect of the direction of light (d) both are experimental groups, but only test group 1 shows the effect of the direction of light (e) both are experimental groups, but only test group 2 shows the effect of the direction of light b one is the experimental group and one is the control group, and together they show the effect of the direction of light

Explanation:

An experimental group has a variable being tested. Here, both groups have different light - direction setups. Test Group 1 has light only on one side, showing the effect of light direction as stems and leaves bend towards it. Test Group 2 has light from all directions, so there is no bending. Since both have a manipulated variable (light direction), they are experimental groups.

Answer:

D. Both are experimental groups, but only Test Group 1 shows the effect of the direction of light