All of these are evidence of a common evolutionary ancestry for cell signaling except 1. both bacteria and eukaryotic cells have receptors for intercellular signaling in their cell membranes

2.both plant and animal cells participate in cell junctioning

3. both plant and animal cell plastids code for cell membrane receptors

4. both unicellular bacteria and yeast have complex cell-signaling systems that use chemical messengers

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

Paint and solvents pose no potential hazard to human health. select the best answer from the choices provided t f

Moving down the ramp from 6 meters to