Depends on the beetle, but I would most likely say plants.
Starvation? the human population can grow so much where we populate faster than we eat food and we use up all of our resources (food).
Answer:
Layer A is the crust and Layer B is the mantle.
Explanation:
Vestigiality is the retention during the process of evolution of genetically determined structures or attributes that have lost some or all of the ancestral function in a given species. Assessment of the vestigiality must generally rely on comparison with homologous features in related species.
Living
Genes
Cells or genes
