Download Arthropod Quiz

Arthropod Quiz
Study questions
Arthropods
Arthropods are bilaterally symmetrical and have an _____ made of chitin
exoskeleton
_________ make up the largest phylum of animals.
Arthropods
What is the largest group of arthropods?
A: Crustaceans
To grow arthropods must __________, or shed their exoskeleton.
A: Molt
An arthropods ____ is composed of chitin, and secreted by the underlying layer of tissue.
Exoskeleton
The group crustacea include ____________, ______________, _______________, and _____________.
(barnacles, shrimps, lobsters, crabs)
The arthropod body is _______________ symmetrical. (Bilaterally)
Crustaceans
Crustaceans have a skeleton hardened by ______________ _____________.
Calcium carbonate
Crustaceans use their ___________ to sense their surroundings.
Antennae
Most crustaceans posses gills to obtain ______
Oxygen.
Small Crustaceans
What are the most abundant and important plankton?
(Copepods)
Some copepods keep from sinking in the water by using their?
( antennae)
Where do barnacles usually live?
(Attached to surfaces)
What are the barnacles' legs called?
(Cirri)
A beach hopper is what type of crustacean?
(Amphipod)
Which crustacean can be easily identified by its similar legs and flat back?
(Isopods)
Which crustacean is food source for animals like whales and penguins?
(Krill)
___________ are filter feeders that usually live attached to surfaces, including living surfaces such as whales
and crabs.
Barnacles
___________ are planktonic, shrimp-like crustaceans, and are usually eaten by whales.
Krill
Amphipods have ______________ that are specialized according to function.
appendages
___________ is another name for krill.
Euphausiids
___________ is the shield-like structure that covers the anterior part of crustaceans.
Carapace
___________ are non-larval, planktonic crustaceans.
Copepods
Barnacles are among the types of__________ organisms.
A: Fouling
____________________ are filter feeders that usually attach themselves to surfaces like whale, ships, or
crabs.
(Barnacles)
______ _______ are parasites of fishes and crustaceans. (Fish lice)
Shrimp, Lobsters and Crabs
Crabs, lobsters and shrimp are called decapods: “deca” means ________ and “pod” means __________
(ten, foot)
Decapods have ___________________, which are close to the mouth to sort and push food towards the
mouth.
(Maxillipeds)
Shrimp feed of detritus, meaning they mostly _________________ for food. (Scavenge)
Krill filter feed on ________ and other _______. diatoms, plankton
Are hermit crabs true crabs?
(NO)
The Abdomen in male crabs is __ shaped and in females is __ shaped
(V and U respectively)
Shrimp and lobsters have ___________ compressed bodies.
Laterally
______ are the largest group of crustaceans.
A: decapods
The first five pairs of legs that decapods possess are known as_______.
pereopods
Lobsters eat _____ and _____.
Mollusks and Sea urchins.
Decapods include ________, __________, ____________. (shrimp, lobsters, crabs)
Lobsters are mainly ________ and hunt at night. (nocturnal)
Feeding and Digestion
What is the most common way copepod and other planktonic crustaceans eat?
(Filter Feeding)
The stomach is ___ _______ in decapods
(Two Chambered)
__ _____ is typically carried out by gills attached to some appendages
( Gas Exchange)
___________ are adapted for piercing and sucking in parasitic copepods and isopods
Appendages
Absorbed nutrients are distributed by an ___________ circulatory system.
Open
Crustaceans use specialized ________ to catch and move food.
appendages
The stomach has_________ teeth that are used for grinding food.
chitinous
__________ and _________ crustaceans use filter feeding to eat. (Copepods, planktonic)
Nervous systems
Most crustaceans have small simple brains but _____ ____
(Complex Eyes)
What do crustaceans use for balance?
(Statocysts)
Crustaceans have well-developed ___________ organs.
Sensory
In decapods the compound ___________ are at the end of movable stalks and can be used as periscopes.
Eyes
Crustaceans have well developed _________ organs.
sensory
Reproduction
Female decapods carry their eggs using __________ or ___________ specialized appendages beneath the
body.
pleopods, swimmerets
Mating takes place when the females have a soft__________, right after molting.
exoskeleton
Horseshoe Crabs
Horse Shoe crabs are the only surviving members of the group ______
(Merostomata)
Horseshoe crabs are considered to be ____ _____
(Living Fossils)
Horseshoe crabs often reside in______ and _______ waters.
shallow, coastal
Horseshoe crabs can be identified by their horseshoe-shaped_________.
Carapace
The blood of horseshoe crabs is harvested yearly because their blood contains blood cells that are used to
detect ________ __________ and ____________ in medical products.
Gram-negative bacteria, endotoxins
Sea Spiders
Where are sea spiders the most common?
(Cold Water)
How many legs do sea spiders have?
Four or more
Sea spiders use a large ___________ to feed on soft invertebrates.
Proboscis
Class notes
Horseshoe crabs have blue blood; the blue color is caused by ___________ as opposed to iron in human blood.
Copper
There are ___________ different species of horseshoe crabs.
four
Horseshoe crabs have been dated back _____ million years.
300
The most abundant zooplankton are___________.
copepods
Arthro means______ and pod means______.
A: joint, foot
_______ are arthropods that can reach 10 feet long.
A: giant spider crabs