Match the following terms and definitions. 1. a degree of organism complexity; either unicellular or colonial
negative feedback
2. the relatively constant state in the internal environment of an organism
system level
3. self-regulation mechanisms that send information to appropriate physiological systems so that appropriate adjustments can be made
positive feedback
4. a control mechanism that inhibits or counteracts an earlier reaction
cellular level
5. a control mechanism that intensifies or enhances an earlier reaction
homeostasis
6. a degree of organism complexity; cells arranged into systems
feedback loops

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

What is true of all organisms in the kingdoms protista, plantae, fungi, and animalia? a. they are multi-celled. b. they are photosynthetic. c. they have cells that contain membrane-bound organelles. d. they contain cells that lack membrane-bound organelles.

Which are reasons cells undergo cell division?