Oat Seedlings are Sometimes Used to Study Auxins Because

Question

Oat seedlings are sometimes used to study auxins because
A)they are a readily accessible monocot, and auxins affect only monocots.
B)they have a stiff coleoptile.
C)they green rapidly in the light.
D)their coleoptile exhibits a strong positive phototropism.
E)monocots inactivate synthetic auxins.

Accepted Answer

Oat seedlings are commonly used in studies involving auxins because their coleoptile (the protective sheath covering the emerging shoot) shows a strong positive phototropism, meaning it grows towards light. This characteristic makes it easier to observe and measure the effects of auxins, which are plant hormones that play a crucial role in directing plant growth towards light.