Question

Choose the odd one with reason please​

Answer 1

Explanation:

1. Amoeba because it is protozoan (Protista Division in plants). While other are animals.
2. Thyroxine because it is not steroidal hormone. While other are Steroidal hormones.
3. Thyroid gland because it is Endodermal in origin while other are Ectodermal in origin. Please note that Adrenal gland is Both Ectodermal and Mesodermal but According to question it is ectodermal too.