Question

1. ★ staar question ★

students set up a controlled experiment by growing the same type of seedlings in two different locations. after a period of time, the students observed the seedlings and recorded their observations in the table shown.

	group #1	group #2
observation	shoots grew straight and upright	shoots bend in the direction of the window

what caused the shoots of the seedlings on the windowsill to bend toward the window?
○ water produced in response to a nitrogen stimulus
○ hormones produced in response to a light stimulus
○ carbon dioxide produced in response to a water stimulus
○ sugars produced in response to a gravity stimulus

Explanation:

The seedlings on the windowsill bend toward light (window). This is phototropism, where plants produce hormones (auxins) in response to light stimuli, causing uneven growth and bending toward the light source.

Answer:

B. Hormones produced in response to a light stimulus