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.
Some 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. 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.