Biology Questions and Answers
Annelids
- What are some examples of
annelids?
Earthworms, leeches and lugworms.
- Which are the
morphological features that
differentiate the beings of the
phylum Annelida from
nematodes and
platyhelminthes?
Platyhelminthes are worms with flat
bodies (flatworms), nworms with cylindricalematod but notes are
segmented bodies (roundworms).
Annelids are cylinsegmented bodies (they aredrical worms with
metameric).
- What is the main
evolutionary novelty
presented by annelids?
The main evolutionary novelty
presented by the beings of the phylumAnnelida is the coelom, the internal
body cavity totally covered by
mesoderm, a farthropods, molluscs,eature also p echinoderms andresent in (^)
chordates. Platyhelminthes are
acoelomate anpseudocoelomate (thd nematodeir interes arenal cavity (^)
is partially covered by mesoderm).
Another important evolutionary novelty
of the annelids is thsystem. e closed circulatory
- What is the morphological
characteristic that
evolutionarily approximates
the beings of the phylum
Annelida to arthropods?
The metameric feature, i.e., the body
segmentation in mapproximates annelids to arthroetameres, (^) pods
since these animals are segmented
beings too. (Bristlesoligochaete and polychaete present iannelids aren (^)
also covered with chitin, the same
substance ofexoskeleton.) the arthropod
- How does digestion in
beings of the phylum Annelida
work and which type of
digestive system do they
have?
Digestion iAnnelida is extracellular. Tn beings of the phylumhese animals (^)
have a complete digestive system, with
mouth and anus.
- Which are the
characteristics and organs of
the digestive system of
earthworms related to the
type of diet of these animals?
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