Agar’s low viscosity also makes it easy to pour into Petri dishes, and its transparency permits observation of microbes growing on its surface.7 Also aiding in this is its low syneresis (extrusion of water from the gel), guaranteeing less surface “sweating”: Once a plate is inoculated, bacterial colonies stay in place and do not mix.
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果实外形也有明显不同。蜡梅果实是坛状或倒卵状椭圆形，种子藏在果实里，果实剥开后，内部种子乍看之下像红豆。而梅花的果实是近球形，有缝合线，被柔毛。