The extracts from 30 species of the green algae were examined for hemagglutination activity with a variety different animal and human erythrocytes which untreated treated enzymes. Almost all showed at least toward one type tested. Strong was detected in 5 Chlorophyta (Anadyomene plicata, Avrainvillea erecta, Boodlea struveoides, Halimeda velasquezii discoidea) enzyme-treated rabbit sheep erythr...

Molecular evolutionary rates within two protistan and three metazoan taxa were estimated using divergence times derived from fossil records. The results indicate that the small-subunit rRNA sequences within Dasycladales (Chlorophyta) and Bacillariophyceae evolved at a rate approximately two to three times faster than that estimated within Echinodermata, Mollusca, and Actinistia-Tetrapoda. It wa...

To date, the majority of molecular genetic studies in algae have utilized a fairly limited range of markers such as the plastid rbcL gene and spacer, the mitochondrial cox2-3 spacer or the nuclear ribosomal DNA and spacers. The lack of available markers has been particularly problematic in studies of within-species variation. Whilst microsatellites are now being developed in many algal species,...

The male-female dichotomy has evolved independently in nearly all lineages of multicellular organisms. Why this should be the case is still uncertain, but recent studies of mating-type genes in green algae open a promising new way to explore molecular-genetic aspects of the evolution of dichotomous sexes.