bio lab quiz 9 Flashcards
role of decomposers in an ecosystem
use nonliving organic matter as a source of energy and return inorganic materials to the environment when they die
what is spirogyra and how does it reproduce
- filamentous freshwater species that possesses ornate spiral chloroplasts
- sexual reproduction through conjugation = tube forms between adjacent filaments
where can algae be found
aquatic areas, tree trunks, sidewalks, buildings, unwashed cars, snow
diatoms and their structure
- uniquely shaped algae that posses a test, or shell, made of 2 halves
how do amoebas move and capture food
their ability to move and capture food is through false feet also called pseudopodia
foraminiferans
group of aquatic and marine amoeboid protists with elaborate, colorful shells composed of calcium carbonate
name of plant like protists
photosynthetic protists
stages of sponge life
???? vegetative growth phase is followed by gemmulation (asexual reproduction) or sexual reproduction, cryptobiosis (resting phase), the hatching of gemmules, and finally regeneration
classes of sponges
- calcarea - small marine sponges with spicules composed of calcium carbonate
- demospongiae - largest class of sponges, brilliantly colored with monaxonal or tetraxonal siliceous spicules somtimes bound together by spongin
- hexactinellida - “glass sponge” because of the six rayed siliceous spicules that are fused into an intricate glass like lattice
be able to identify the 5 images
????????
ostia
pores that allow water into the interior of the sponge
spongocoel
central cavity
choanocytes
the flagellated, collar shaped cells that line the central cavity
osculum
water eliminated from sponge this way
mesohyl
cells of sponges that are arranged in a gelatinous matrix
