What do microbes do when they are threatened

Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment

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

What is the best conclusion based on this data? the hypothesis was not supported because the data indicated that fertilizing plants does not improve plant growth. the hypothesis was supported; to get the best growth, use 5 milliliters of fertilizer per plant. the hypothesis was not supported; the data indicated that too much fertilizer can inhibit plant growth. the hypothesis was supported; to get the best growth, use 15 milliliters of fertilizer per plant.