Why carbon dioxide and water can pass through the cell membrane but not starch and proteins?

The process by which the temperature of an air mass decreases as the air mass moves over a cold surface is? Why tin is required? What are the various classes of alkanoic acid? Is a part of all living cells and is a necessary part of all proteins enzymes and metabolic processes involved in the synthesis and transfer of energy? What is todays annual salary for an archaeologist? How long does it take to get to light water valley? What is a millisecond? What direction must the coarse adjustment knob be moved to raise the body tube? How do you make map direction? Why are action potentials said to be all or none where as epsps and ipsps are described graded? How is visible light used in photography? Is carbon monoxide an atom an element and a pure substance? How do you astronomers use spectra to determine the composition of a star? What is the low pressure area around equator? Why is high biodiversity is advantageous over low biodiversity? When you look at the earth from above the North Pole does it appear to spin clockwise or counterclockwise? What colour can iron rich limestone be? What are the four nucleotide present in tRNA? What is the risk of compromised blood supply to the bone Name the condition? Which Degree is higher a Bsc or a BA?