Mollusks
True or False? Mollusks are soft-bodied animals that usually have an internal or external shell.
True (p.701)
True or False: Arthropods have a endoskeleton.
False (p.715) They have an exoskeleton (tough external covering).
Which group of Arthropods typically have chewing mouthparts called mandibles?
Crustaceans (p. 720)
True or False? There are more insects in the world than non-insects.
True. (73% insects) - (p.726)
True or False? The skin of an echinoderm is stretched over its endoskeleton.
True. Endoskeleton is also called internal skeleton which is formed of hardened plates of calcium carbonate.(P. 734)
Mollusks are named from the Latin word molluscus meaning ____________?
Soft (Pg. 701)
What does the word “arthropod” mean?
joint foot (p.715)
During molting an arthropod sheds its exoskeleton. What is a disadvantage that the arthropod could face during molting?
It is vulnerable to predators because the new skin is still soft. It takes several hours for molting. Some hide while molting or complete it at night. (P. 719)
Name the 3 parts of an insect.
Head, thorax and abdomen. (P. 727)
A unique feature of Echinoderms is a system of internal tubes called: _______ _________ _______. (3 words)
Water vascular system (P. 735)
What is the name of the body cavity in a mollusk that contains the heart and is surrounded by mesoderm tissue.
true coelom. (P. 702-703)
Arthropods circulation involves a well-developed heart that pumps blood through arteries that branch and enter the tissues. What is the name of this circulatory system?
open circulatory system (p. 717)
How many pairs of feet are attached to the thorax of an insect?
Three (P. 727)
The process by which an insect changes shape and form (egg to grub to pupa to adult) is called what?
Complete metamorphosis (P. 729)
What does the word “Echinoderm“mean?
spiny skin (p. 734)
The body plan of most mollusks have what four parts?
foot, mantle, shell, and visceral mass (p.702)
Insects and Spiders dispose of nitrogenous wastes using ______________ tubules.
Malpighian tubules (p. 717)
What is one thing that the exoskeleton of a arthropod does?
Protects the body
Supports the body
helps prevent loss of body water
( P. 715 )
What are trachael tubes used for in insects?
respiration (p. 727)
Name the 5 classes of Echinoderms.
Sea Urchins and Sand Dollars; Brittle Stars; Sea Cumbers; Sea Stars; Sea Lilies and Feather Stars. (P. 737-738).
Name all 3 groups of Mollusks and give one example of each.
Gastropods (pond snails, land slugs, sea butterflies, sea hares, limpets, and nudibranchs).
Bivalves (clams, oysters, mussels, and scallops)
Cephalopods (octopi, squids, cuttlefishes, and nautiluses
(p. 705-706)
What is the name of the system which controls molting in which an arthropod sheds its entire exoskeleton and manufactures a larger one to take its place?
Endocrine system. (P. 719)
Name each class of Arthropoda with one example for each.
Crustaceans = crab, shrimp, lobster, crayfish, and barnacles. (p. 720)
Spiders and their relatives = Horseshoe crabs, spiders, ticks, and scorpions (p. 722)
Insects and their relatives = centipedes, millipedes, insects (p. 725)
The 3 basic castes (individuals, within an insect society, specialized to perform particular tasks or roles), are __________, ______________, and _________.
Queens, reproductive males, and workers. (P. 732)
What class of echinoderm is mostly carnivorous?
Sea Stars. They prey on bivalves such as mussels. (P. 736, 737).