In a balanced ecosystem, the number of consumer is?

Modern whales developed their traits through natural selection what occurs during the process of natural selection

How can a geological time scale best be reconstructed? a) comparing vestigial structures in living species b) comparing homologous structures in living species c) examining homologous structures in fossil remains d) examining the written records of scientists from past cultures

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?