PLEASE HELP Word Bank- cell, tissue, organ, organ system

_- The building block of all living things

_-Specialized tissue make up these

_- When more than one thing is working for a common purpose

_- Multiple layer of these create organs

Heredity has an impact on personal health, but environmental factors are important as well. select the best answer from the choices provided

Next pretest: evolution select the correct answer in a laboratory population of flies, the female flies are gray and the males are yellowish gray. biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to successfully reproduce. what phenomenon could explain such a change? a sexual selection b. disruptive selection c. stabilizing selection d. directional selection

This is the interaction of two organisms where one is and the other is neither nor harmed.