If these structures are alive, they stain deep red or orange in the tetrazo
If these structures are alive, they stain deep red or orange in the tetrazolium chloride assay. In several species, these structures are attached to lipid-rich appendages called elaiosomes. The process of subjecting these structures to thermal or chemical stress to increase their permeability is called scarification, and the process of subjecting them to cold and moist conditions is called stratification. They are surrounded by a structure made up of the tegmen and testa, which develops from the (*) integuments of their precursors. These structures travel through anemochory, hydrochory, and zoochory; or, by wind, water, and animals. Organisms can be classified as monocots or dicots based on whether these structures contain one or two embryonic leaves. For 10 points, name these structures surrounded by a nutritive coat, from which many plants germinate and grow.
If these structures are alive, they stain deep red or orange in the tetrazolium chloride assay.
seeds [or seed coats; accept plant embryos or similar answers on the first sentence] 