Lab Practicum #2 Flashcards
are mollusks protostomes or deuterostomes
protostomes, blastopore becomes the mouth
what are the five phylums of Mollusca
polyplacophora
bivalvia
gastropoda
cephalopoda
scaphopoda
does the clam have a circulatory system like ours?
no, clams have a closed circulatory system instead ofd an open circulatory system like ours. They have closed blood vessels and open blood spaces where blood can flow freely throughout the body.
what is the function of the radula
tongue-like, used to process foods, used to scrape and tear the food before it enters the esophagus.
what are two synapomorphies of Anellida
segmentation, setae
what are setae
bundles of filaments made of chitin and protein
what classes are in phylum annelida
class oligochaeta
class polychaeta
class hirudinea
are class Oligochaeta self-fertilizing
no, they can produce egg and sperm but cannot self-fertilize
what is the typhlosole used for
increase intestine for more efficient nutrient absorption
what is the hirudin and how do leeches use it
leeches saliva makes a substance hirudin, which prevents blood from coagulating and it dilates the blood vessels, allowing the wound to bleed for a long time for the leech to feed.
what is the outer covering of phylum arthropoda called?
cuticle/exoskeleton
what are the four synapomorphies of Phylum arthropoda
exoskeleton, jointed limbs, tagmata, compound eye
what are the four subphyla of phylum arthropoda
trilobita
chelicerata
crustacea
uniramia
how long ago were trilobites living
until 250 million years ago
what is the difference between class Diplopoda and Chilopoda
dipolopoda- millipedes (two pairs of legs each segment)
chilapoda- centipedes (one pair of legs each segment)
