Which reason best describes why the cell membrane maintain homeostasis

the cell membrane is selectively permeable
the cell membrane is composed of liquids and phosphates
the cell membrane is both hydrophilic and hydrophobic
the cell membrane is a bilayer structure

Approximately what wavelength of light is best absorbed by chlorophyll a

Which contributions did galileo make to the model of the solar system? check all that apply. a mathematical model for the orbits of the planets scientifically accurate data on planetary orbits data that showed that planets reflected sunlight similar to earth's moon up the idea that stars are other suns that do not move u observations of the moons of jupiter rotating around the gas giant

On a spring day, a middle-latitude city (about 40? north latitude) has a surface (sea-level) temperature of 10 ? c. if vertical soundings reveal a nearly constant environmental lapse rate of 6.5 ? c per kilometer and a temperature at the tropopause of –55 ? c, what is the height of the tropopause?