Naomasa is my best friend.

I think his answer is correct.

This regular tetrahedron is composed of equilateral triangles on all sides.

He made a model of a regular tetrahedron.

The blastula stage is an early stage where the fertilized egg divides and becomes a cell with many cells.

It was found that he has a cyst in his brain.

In plant cells, there is a large bag called a vacuole.

A cnidocyte is a special cell that organisms such as jellyfish and sea anemones possess.

The chromatophores of a frog play an important role in changing its body color.

This regular dodecahedron is a geometric shape with perfect symmetry.