A student wanted to investigate the effect of light on the growth of cress seedlings. The student had three pots of seedlings grown in
different conditions. Pot 1 was placed with light from above. Pot 2 was
placed in a cupboard with no light. Pot 3 was placed in a window with
light from one direction only.
The image shows the seedlings at the end of the investigation.
Pot 1
Pot 2 Pot 3
Source Night Cattlin Science Photo Library)
What is the response shown by the cress seedlings in Pot 3? (7.13A)

A. photosynthesis
B. condensation
C. Hrespiration
D. phototropism

D.phototropism

Explanation:

Phototropism is a type of tropism in which a plant or plant part responds to light. According to this question, a student wanted to investigate the effect of light on the growth of cress seedlings. The student used three different pots for the experiment.

Pot 1 was placed with light from above. Pot 2 was placed in a cupboard with no light. Pot 3 was placed in a window with light from one direction only. However, the image attached to this question shows that the plants in the different pots face different directions in response to light, which depicts phototropism

jdjxnbfb

explanation:

jjfnc fdnxnxx

answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e