Biology Questions and Answers
- How do arthropods grow?
Due to the presence of exoskeleton the
growth oDuring the growth pf an arthropod is peeriod the animalriodical. (^)
loses the exoskeleton, grows and
develops a nprocess is named ecdysis,ew exoskeleton. T or moltinhis (^) g.
- How does the presence of
exoskeleton explain the
general small size of
arthropods?
Since they have exoskelperiodic ecdysis, the growth ofeton and
arthropods is limited to avoid the animal
becominharm. Thg vulnerable to environmere are however some ental
arthropod species with rsized individuals, like “giant”elatively large-
cockroaches, crabs and spiders.
- How can the features of the
arthropod exoskeleton explain
the terrestrial adaptation of
some species of the phylum?
In the arthroplayer of wax which od exoskelis impermeable. Thiseton there is a (^)
feature was fuarthropods from the ndamental for primitivesea to survive on (^)
dry land without losing excessive water
to the environment.
- What is the type of
digestive system present in
beings of the phylum
Arthropoda? Are these
animals protostomes or
deuterostomes?
The digestive tube of arthropods is
complete, coArthropods are protostome ntaining mouth animals,and anus. i.e., (^)
in their embryonic development the
blastopore originates the mouth.
- How is the extracorporeal
digestion associated to
predation in arachnids?
Arachnids can inparalyze or kill their preys usingoculate poison to
structures called chelicerae. The prey is
partiallythe arach digested outside thnid by digestive enzymese body of
inoculated together with the venom or
injected extracorporposterieal digestion thorly. After thise food is (^)
ingested and gains the digestive tube of
the predator whdigestion continuere the extracellulares.
- Which organs or
respiratory adaptations do
aquatic and terrestrial
arthropods respectively
present?
In crustaceans,there are richly vascularized g typical aquatic beings,ills that
make contact with water and permit gas
exchange. In terrestrial insectsrespiration is tracheal and gases fl theow (^)
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