Study Set Content:
the male sex structures, slightly resemble dense clusters of tiny grapes on slender branches of the male gametophyte thallus
Spermatangia
Each spermatangium contains a
single spermatium that functions as a nonmotile male gamete.
female sex structures
called carpogonia
Each carpogonium consists of a single cell that looks something like a microscopic bottle with a long neck called a
trichogyne.
combined constitute the cystocarp.
pericarp and carposporangia
Diploid asexual spores called
carpospores
spermatia have no flagella
they cannot move of their own accord,
The red to purplish colors of most red algae are due to varying amounts of red and blue accessory -pigments called
phycobilins
red algae may have been derived from the
cyanobacteria
The principal reserve food is a carbohydrate of a red algae is called
floridean starch
spindle-shaped, has no rigid wall, and can be seen to change shape even as the organism moves along.
Euglena
A superficial microscopic examination of water from such a pool usually reveals large numbers of active green cells, and a closer inspection may reveal one to several of the more than species of euglenoids
750
strips and the plasma membrane are devoid of cellulose and are called a
pellicle
presence of what in euglena which food can be ingested
a gullet, or groove
carbohydrate food reserve of Euglena is called
paramylon
Euglena reproduction
Reproduction is by cell division
caused by the sudden and not fully understood multiplication of unicellular organisms called dinoflagellates.
Red tides
Dinoflagellates
Phylum Dinophyta
number of species of Dinoflagellates
3,000
number of species of Dinoflagellates that can cause a red tide
300
