The answer is, "It has membrane-bound organelles."
Recently, we found that across several C 4 grasses, leaf width (LW) correlated positively with g sw and negatively with iWUE. Here, using 48 field-grown genotypes of Sorghum bicolor, a C4 crop suited to dry and hot environments, we validated these correlations. Three times a day, we monitored leaf gas exchange and modeled leaf energy balance together with structural characteristics as possible iWUE predictors.
The underlying causes of variance in intrinsic water-use efficiency (iWUE = net photosynthesis/stomatal conductance for water vapors, gsw), particularly in C4 plants, are not well understood. Recently, we found that across many C4 grasses, leaf width (LW) associated negatively with iWUE and favorably with gsw. Here, using 48 field-grown genotypes of Sorghum bicolor, a C4 crop suited to hot and dry environments, we validated these correlations. Three times a day, we monitored leaf gas exchange and modeled leaf energy balance together with structural characteristics as possible iWUE predictors. LW associated favorably with gsw, interveinal distance of longitudinal veins, and the proportion of stomatal aperture relative to maximum while negatively with iWUE, stomatal density, and interveinal distance. Modeling of the energy balance revealed that broader leaves especially during noon when air temperatures approached 40°C, required to open their stomata more to produce a higher negative leaf-to-air temperature differential. These findings demonstrate the crucial part LW, which affects stomatal aperture and coordinates vein and stomatal characteristics, plays in forming iWUE. LW might therefore be used to forecast sorghum genotypes with greater iWUE.
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Answer:
The leading strand is copied in the 5' to 3' direction and the lagging strand is copied in the 3 to 5 direction.
Explanation:
1. The original DNA molecule remains intact, although it acts as a template for the formation of a copy that contains two new antiparallel strands. - this is false.
DNA replication is said to be "semi conservative". This is because in making a new DNA molecule, one of the strands is from the original DNA molecule and one is new. This is true for each new molecule produced One DNA molecule makes 2 new molecules, each containing one of the original strands
2. The leading strand is copied in the 5' to 3' direction and the lagging strand is copied in the 3 to 5 direction. This is true. The synthesis of each strand occurs through a distinct mechanism. The leading strand is synthesised 5'-3' (towards the replication fork), and the lagging strand is synthesised from 3'-5', away from the replication fork. T
he leading strand is synthesised continuously using an RNA primer to begin the process. The lagging strand is synthesised discontinuously, with several short primer sequences permitting the synthesis of short fragments (Okazaki fragments) that are later joined by DNA ligase. <em>NB: this is easy to remember if you consider that </em><em>3 lags behind 5</em>
3. Both strands are copied to form Okazaki fragments, which are later annealed by DNA Ligase. This is false. Only the lagging strand replicates to form Okazaki fragments
4. The replication process proceeds on both strands in the same direction, which requires that RNA primers bind to the lagging strand. This is false. The strands are synthesised in different directions
A is the answer to this question
