Flowering plants return to the sea…

the caspian sea s role in energy supply to china

چکیده ندارد.

Neopolyploidy in Flowering Plants

Justin Ramsey1,2 and Douglas W. Schemske3 1Department of Botany, Box 355325, University of Washington, Seattle, Washington 98195-5325; email: [email protected] 2Present address: Department of Botany, University of Guelph, Guelph, Ontario N1G 2W1, Canada; email: [email protected] 3Department of Plant Biology and Kellogg Biological Station, Michigan State University, East Lansing, Michig...

Sex chromosomes in flowering plants.

Sex chromosomes in dioecious and polygamous plants evolved as a mechanism for ensuring outcrossing to increase genetic variation in the offspring. Sex specificity has evolved in 75% of plant families by male sterile or female sterile mutations, but well-defined heteromorphic sex chromosomes are known in only four plant families. A pivotal event in sex chromosome evolution, suppression of recomb...

REl'RODUCTlVE ALLOCATION IN FLOWERING PLANTS

Leaf morphogenesis in flowering plants.

Leaves, or organs derived from leaves, are the most morphologically diverse structures in a plant (Gifford and Foster, 1989). They occur as prominent photosynthetic structures; as inconspicuous fragments of tissue in tubers, rhizomes, and the stems of many cacti; as nonphotosynthetic storage organs in bulbs; and, in carnivorous plants, as complex structures specialized for catching and digestin...