Zach is conducting an experiment to observe which type of fertilizer will allow a plant to grow the tallest. he put three plants in identical pots and placed them in the same location. He watered the plants each day with the same amount of water. Next, Zach measured the plant growth and then recorded his observations. Which of these is the Test (independent) variable in Zach's experiment?

the darker peppered moth species were favored due to the fact that the industrial revolution had made all the nearby trees a darker color instead of white.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive