Question

Mark the odd term in each series: Give category for the rest of terms.

Acrosome; flagellum; spiral mitochondria; spermatozoa

Answer 1

Spermatozoa

1. The acrosome is the cap-like structure present in the head region of the sperm.
2. The long flagellum of the sperm provides it its mobility.
3. Spiral mitochondria in the middle piece of the sperm provide energy for locomotion.
4. Acrosome, flagellum, and spiral mitochondria are parts of the sperm.
5. The sperm is also known as the spermatozoa.

Hence, spermatozoa is the odd one out and the others are parts of the sperm.