Design speeds for frontage roads are a factor in the design of the roadway. For consistency, design speeds should be used that match values used for collector streets or highways. For urban frontage roads, the desirable design speed is 50 mph [80 km/h] and the minimum design speed is 30 mph [50 km/h].
Different plants reproduce in different ways. Some plants reproduce asexually, others do use a type of sexual reproduction. Flowering plants in particular reproduce both sexua â¦ lly and asexually. Reproduction in flowering plants involves the production of gametes, the transfer of the male gametes to the female ovules is through pollen.
Why Do Plants Have Flowers? Flowers are used by a plant to have kids....er.....seeds, and new baby plants. Male parts of the flower make pollen, which is a yellow dust that contains all kinds of information on being a plant just like Dad.hy Do Plants Have Flowers? Flowers are used by a plant to have kids....er.....seeds, and new baby plants. Male parts of the flower make pollen, which is a yellow dust that contains all kinds of information on being a plant just like Dad.