Water lilies float on the surface of ponds. They grow in shallow ponds, so the roots of the plant can grow down into the mud at the bottom of the pond. Water lilies need about 4–6 hours of sunlight each day, and grow best in tropical areas. Which statement best explains why water lilies cannot survive in the marine biome?
A.
The marine biome has an average yearly rainfall that is too high.
B.
The water in the marine biome is salt water rather than fresh water.
C.
The water in the marine biome is fresh water rather than salt water.
D.
The marine biome has an average yearly rainfall that is too low

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

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.

This is an active transport mechanism by which cells pump sodium and potassium ions against the concentration gradient