a) The characteristics of the pollen grains that can be used to distinguish taxonomic features include size, shape, symmetry, number and arrangement of pollen units and apertures, exine and intine thickness, internal texture, surface sculpture, etc.
b) Species is a group of organisms characterized by similar anatomical and physiological features, habits, living conditions, and are capable of interbreeding.
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Define the term species and briefly discuss the species concept. Give detail