Sorus evolution in ferns
Hand in hand with the reduction in size of single sporangia are seen more and more complex aggregations of sporangia known as sori. The meristematic area. The region of new cell growth. That produces them may continue its activities over a number of weeks, producing sporangia of all ages, older ones being pushed aside as new. A frond is a large, divided leaf. In both common usage and botanical nomenclature, the leaves of ferns are referred to as fronds and some botanists restrict the term to this group. Other botanists allow the term frond to also apply to the large leaves of cycads and palms. Is commonly used to identify a large, compound leaf, but if the. Varens zijn vaste kruidachtige of. Boomvormige planten. Alle europese varens zijn kruidachtige planten. Het bouwplan van de planten. Met de onderdelen stengel, blad en wortel. Gaat voor de varens soms niet goed op, met name voor de fossiele soorten. Port manteaux churns out silly new words when you feed it an idea or two. Ll get back a bunch of portmanteaux created by jamming together words that are conceptually related to your inputs.