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Ch. 35 Study Guide

Biology 2

QuestionAnswer
Segmentation is an advantage for annelid worms because it is accompanied by the duplication of some internal organs
An earthworm uses its setae to grip the soil surface
What feature(s) do both annelids and mollusks share? bilateral symmetry, three germ layers, coelomates with true body cavities, protosomes
Which structure makes the shell in a mollusk? mantle
What is the name of the feeding structure that is used by most gastropods? radula
Which class of Mollusk does not have a radula? Bivalvia
Gastropods undergo a process called _________________ where the visceral mass twists around 180 degrees in relation to the head Torsion
How many siphons does a clam have? 2
Which class of Mollusks have a closed circulatory system? Cephalopoda
How many tentacles does a squid have? 10
Based on a picture, know what class of Mollusks an organism belongs to?
What structure allows water to flow over it for the exchange of carbon dioxide for oxygen. Stomata
One difference between leeches and polychaetes is that leeches do not have setae
All annelids in the classes Oligochaeta and Hirudinea have a segmented coelom
What is the role of the typhlosole? increases surface area available for digestion and absorption
What structure allows earthworms to eliminate cellular wastes and excess water? nephridia
Polychaeta means "many bristles"
Be able to identify a part of internal anatomy in an earthworm from a diagram?
Where is chitin secreted from in an earthworm? clitellum
What is the smallest class (in number) of annelids? Hirudinea (500 species)
Most aquatic mollusks and annelids have a larval stage of development called a nauplius. False
The main function of the gizzard in an earthworm is what? To grind and digest food from soil
What structure allows water to leave bivalves after going over the gills? excurrent siphon
What is a characteristic shared by mollusks and annelids. bilateral symmetry
How do polychaetes differ from earthworms? Polychaetes differ from other annelids because they have antennae and specialized mouthparts.
Created by: user-1969077
 

 



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