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Cells

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GROWING PAINS  As cells divide and grow to replenish and repair organs, accidental mutations may crop up in cancer-associated genes. A new study suggests such random mistakes are the source of 66 percent of mutations in cancer cells (illustrated here) across the board.

Brachypodium distachyon

STOMATA SUPERSTARS  Scientists have gained new insight into why grasses like Brachypodium distachyon have extra-efficient stomata, adjustable pores on leaves that help regulate the exchange of water and gases between a leaf and the outside world. 

cancer cells

OXYGEN DEPRIVATION  Cancer cells (shown in blue) surround a blood vessel (red) in a mouse tumor. Cells on the tumor’s edge are dying, starved of oxygen. But treatments to starve tumors have come up short.

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