Many scientists claim plants are more complex than animals based on the differences in plant and animal cells. what evidence can scientist use to support their claim?

The plant cells are more complex because it has more structures like the cell wall and chloroplast.

Plant cells can be larger than animal cells. The normal range for an animal cell varies from 10 to 30 micrometers while that for a plant cell stretches from 10 to 100 micrometers. Beyond size, the main structural differences between plant and animal cells lie in a few additional structures found in plant cells. These structures include: chloroplasts, the cell wall, and vacuoles.

Hope this helps.