Context: This organism is Danio rerio. It is a member of the animal kingdom.
Danio rerio is commonly called a zebrafish. Young zebrafish are see-through! Scientists can easily observe their insides. This trait makes zebrafish a useful organism for scientists to study.
Is Danio rerio made up of one cell?
A. no
B. yes
Choose the right answer from the options and respond with its letter.

A