The growing of plants in nutrient solutions with or without an inert medium to provide mechanical support Monocotyledon a subclass of angiosperm plants based on anatomical characteristics: narrow leaves, one cotyledon, parallel veins in the leaves, flower parts are usually in multiples of threes, scattered arrangement of primary vascular bundles in the stem and fibrous root system rthologs Proteins with the same or similar functions but different amino acid sequences, evolutionarily derived from a common ancestral gene