One cannot distinguish whether a plant is C3 or C4 by observing its leaves and other morphological features externally. Unlike C3plants, the leaves of C4 plants have a special anatomy called Kranz anatomy and this difference can only be observed at the cellular level. For example, although wheat and maize are grasses, wheat is a C3 plant, while maize is a C4 plant.
Define a taxon. Give some examples of taxa at different hierarchical levels.
What are the steps involved in formation of a root nodule?
Multicellular organisms have division of labour. Explain.
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