Tough e noughâ¢ race bibs are a line of tear and water resistant bibs printed on a biodegradable paper laminate. 2: Are Tough e noughâ¢ race bibs as durable as synthetic paper (Tyvek)? Tough e noughâ¢ race bibs are as durable as bibs made on synthetic paper because they are made with an inner layer of plastic film.un a greener race with Tough enoughâ¢ biodegradable race bibs. Introducing a new line of tear and water resistant race bibs printed on a biodegradable paper laminate.
A single daisy or sunflower, for example, is not a flower but a flower head âan inflorescence composed of numerous flowers (or florets). An inflorescence may include specialized stems and modified leaves known as bracts.
1 Monoecious plants have both types of imperfect flower on the same plant. 2  Dioecious plants have imperfect flowers on separate plants; that is, some plants are male, some female. 3  Examples include willows, poplars, and the date palm.ome angiosperms are imperfect, having either microsporangia or megasporangia but not both. 1  Monoecious plants have both types of imperfect flower on the same plant. 2  Dioecious plants have imperfect flowers on separate plants; that is, some plants are male, some female.