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.
Flowering plants reproduce through sex. Like other sexual organisms, flowering plants reproduce by bringing together separate sperm cells and egg cells that combine their genetic material to form a zygote. In plants, the zygote matures into the seeds that will grow the next generation.ross pollination occurs when pollen from one flower is carried to the stigma of another flower of the same variety. Some flowering plants can pollinate themselves if cross-pollinating vectors are not present. In self-pollination, pollen grains from the anther land on the stigma of the same flower.