When a plant's root grow downward, this is an example of:?

0 ⤊

a. a tropism
b. a nastic response
c. photoperiodism
d. response to a soil chemical

2007-02-11 13:26:35 · 2 answers · asked by Tessy 1 in Science & Mathematics ➔ Biology

A. It's a tropism - a plant response to the environment.
In this case, it's positive geotropism or positive gravitropism.

2007-02-11 13:28:56 · answer #1 · answered by ecolink 7 · 0⤊ 1⤋

Geotropism

2007-02-11 13:29:07 · answer #2 · answered by Yosh 3 · 0⤊ 0⤋