Eugen Bleuler. (Swiss psychatrist)
Only around 10% of bacteria is harmful, so the majority of bacteria is helpful.
Horizontal or transverse or axial cut is if you cutting the object with the horizontal plane. The cut would look like ( -- ).
Vertical or longitudinal is cutting in the vertical plane. The cut would look like ( | )
There is also coronal cuts which were a cut with direction from front to back.
Chloroplasts. Animal cells don’t have chloroplasts only plants