Phototropism Practice Problems

How does exposure to red light induce germination among small seeds?

The following are the functions of phototropin, except:

Phytochromes are photoreceptors in plants that are sensitive to:

Which of the following describes the movement of plant growth with respect to the light source?

The function of GA hormone in barley plants is:

Charles and Francis Darwin discovered that light is perceived by:

Which one is not an effect of auxin in plants?

A long-day plant has a critical length of 8 hours. What will happen if we expose this plant to 15 hours of light and 9 hours of dark?

Flowering is induced earlier than usual when __________ is exposed to flashes of red light at night.

Which one is true with respect to Heat shock proteins:

______increases cell elongation, which allows the plant to grow more on the shaded side and bend toward the light source.

Auxins are a group of plant hormones (also known as plant growth regulators) that resemble morphogens in certain ways. Which of the following scientists discovered auxin?

Studies on photoperiodism have revealed that the duration of the dark period is important. Therefore, short-day plants are actually long-night plants. If they are grown in short days but have a long night that is interrupted by a brief light period, flowering is _______.

A plant will only flower after exposure to a 13-hours night and an 11-hours day with 1 minute of darkness after 6 hours. This plant will be classified as: