No, animals did not evolve from plants, and animal ancestors did not have chloroplasts in their cells. While both plants and animals share a common ancestor, they diverged into separate lineages millions of years ago.
Plants and animals belong to different kingdoms in the biological classification system. Plants are mainly autotrophic, meaning they produce their own food through photosynthesis, which requires chloroplasts to capture sunlight. Animals, on the other hand, are heterotrophic and consume organic material for energy.
The common ancestor of both plants and animals likely lived over a billion years ago and was a single-celled organism. Over time, this ancestor evolved in different environments, leading to the diverse life forms we see today. While some early life forms may have had features akin to both plants and animals, the evolution of distinct traits like chloroplasts in plants and the lack of them in animals highlights the divergence of these two groups.
In summary, while plants and animals are related through a distant common ancestor, they have evolved along separate pathways and have fundamentally different cellular structures and metabolic processes.