Fractionation of carbon isotopes in oxygenic photosynthesis product 3-phosphoglycerate is depleted in C due to the kinetic isotope effect of the above reaction. The overall C fractionation for C3 photosynthesis ranges between -20 to -37‰. The wide range of variation in delta values expressed in C3 plants is modulated by the stomatal conductance, or the rate of CO entering, or water vapor exiting, the small pores in the epidermis of a leaf. The δC of C3 plants depends on the relationship between stomatal conductance and photosynthetic rate, which is a good proxy of water use efficiency in the leaf. C3 plants with high water-use efficiency tend to
Need for Speed: Undercover that sort. Chase Linh will tell you [what] you need to do to get on the inside of a racing group in order to get dirt on them, and then after a race she'll say 'We have enough, let's move in.' [But you're left asking: How did that help at all?]" Finally, the in-game frame rate received little praise, and GameSpot particularly criticized the PS3 version for this problem resulting in a lower score on the platform compared to the Xbox 360 and PC versions. "Need for Speed: Undercover" has sold 1.4 million copies in the United States. Need for