Why do lipids make effective cell membranes in living cells? -they bond with water so that the cells are aqueous. -they form barriers so undesirable molecules cannot pass through the membranes. -they cells flush out excess water. -they provide hormones that cells reproduce.

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

The blackbody curve for a star name zeta is shown below. what is the peak wavelength for this star ?

Which ocean zone has the most abundant primary producer and why a) the abyssopelagic zone ,du to the absence of light and cold water temperatureb) the bathypelagic zone, due to the absence of light and cold water temperaturec) the mesopelagic zone ,due to uts high light availability and warm water temperature d) the epipelagic zone,due to its high light availability and warm water temperature