Question 1

List the five features that have contributed to the success of the arthropods.

Accepted Answer

1. A rigid but jointed exoskel

Question 2

What part of a tapeworm contains both male and female sex organs and becomes filled with developing embryos?

Accepted Answer

A)  proglottids 
B)  scolex 
C)  cyst 
D)  gastrovascular cavity 
E)  nematocyst 
A)  proglottids 
B)  scolex 
C)  cyst 
D)  gastrovascular cavity 
E)  nematocyst

Question 3

The term deuterostome refers to

Accepted Answer

A)  having a spiny skin. 
B)  having three germ layers. 
C)  possessing a notochord. 
D)  the second embryonic opening becoming the mouth. 
E)  the coelom forming by outpocketing of the primitive gut. 
A)  having a spiny skin. 
B)  having three germ layers. 
C)  possessing a notochord. 
D)  the second embryonic opening becoming the mouth. 
E)  the coelom forming by outpocketing of the primitive gut.

Question 4

A closed circulatory system is found in

Accepted Answer

A)  insects. 
B)  snails. 
C)  clams. 
D)  earthworms. 
E)  scorpions. 
A)  insects. 
B)  snails. 
C)  clams. 
D)  earthworms. 
E)  scorpions.

Question 5

Which statement about echinoderms is inaccurate?

Accepted Answer

A)  The exoskeleton is made up of bony tissue. 
B)  Gas exchange occurs through gills on the skin. 
C)  Larvae are free-swimming and bilaterally symmetrical. 
D)  A water vascular system allows the tube feet to produce suction. 
E)  Symmetry is radial in the adult, usually with parts in fives or multiples of five. 
A)  The exoskeleton is made up of bony tissue. 
B)  Gas exchange occurs through gills on the skin. 
C)  Larvae are free-swimming and bilaterally symmetrical. 
D)  A water vascular system allows the tube feet to produce suction. 
E)  Symmetry is radial in the adult, usually with parts in fives or multiples of five.

Question 6

Filter feeders are

Accepted Answer

A)  active predators. 
B)  sessile or relatively inactive. 
C)  always herbivorous. 
D)  classified as cnidarians. 
E)  classified as gastropods. 
A)  active predators. 
B)  sessile or relatively inactive. 
C)  always herbivorous. 
D)  classified as cnidarians. 
E)  classified as gastropods.

Question 7

Identify the features unique to the molluscs.

Accepted Answer

1. Molluscs contain a visceral mass that

Question 8

Which statement about arachnids is inaccurate?

Accepted Answer

A)  Ticks and mites are often parasitic. 
B)  Spiders and scorpions are predators. 
C)  Spiders have trachea for respiration. 
D)  Spiders have a pair of fangs which release poison. 
E)  The body parts include a cephalothorax and an abdomen. 
A)  Ticks and mites are often parasitic. 
B)  Spiders and scorpions are predators. 
C)  Spiders have trachea for respiration. 
D)  Spiders have a pair of fangs which release poison. 
E)  The body parts include a cephalothorax and an abdomen.

Question 9

Which of the following is a feature of arthropods?

Accepted Answer

A)  a solid ventral nerve cord 
B)  a variety of respiratory organs 
C)  a well-developed nervous system 
D)  jointed appendages and a segmented body 
E)  All of the answer choices describe features of arthropods. 
A)  a solid ventral nerve cord 
B)  a variety of respiratory organs 
C)  a well-developed nervous system 
D)  jointed appendages and a segmented body 
E)  All of the answer choices describe features of arthropods.

Question 10

Echinoderms and cnidarians

Accepted Answer

A)  are both radially symmetrical. 
B)  both have three germ layers. 
C)  both have the sac body plan. 
D)  are both deuterostomes. 
E)  are both found in freshwater. 
A)  are both radially symmetrical. 
B)  both have three germ layers. 
C)  both have the sac body plan. 
D)  are both deuterostomes. 
E)  are both found in freshwater.

Question 11

Which of the following is classified as a flatworm?

Accepted Answer

A)  corals 
B)  planaria 
C)  sea anemones 
D)  hydrozoa 
E)  Portuguese man-of-war 
A)  corals 
B)  planaria 
C)  sea anemones 
D)  hydrozoa 
E)  Portuguese man-of-war

Question 12

Which type of organism is characterized by having jointed appendages, ability to molt, and three sets of fused segments?

Accepted Answer

A)  molluscs 
B)  echinoderms 
C)  arthropods 
D)  annelids 
E)  chordates 
A)  molluscs 
B)  echinoderms 
C)  arthropods 
D)  annelids 
E)  chordates

Question 13

The following statements refer specifically to sponges, specifically to cnidarians, or to both sponges and cnidarians. Which statement applies specifically to cnidarians?

Accepted Answer

A)  The larval form is flagellated and able to swim to a suitable location. 
B)  Classification is based on the type of skeletal material. 
C)  They resemble a colony of flagellated cells more than a multicellular animal. 
D)  Specialized stinging cells are used to help capture prey. 
E)  Reproduction can be sexual or asexual. 
A)  The larval form is flagellated and able to swim to a suitable location. 
B)  Classification is based on the type of skeletal material. 
C)  They resemble a colony of flagellated cells more than a multicellular animal. 
D)  Specialized stinging cells are used to help capture prey. 
E)  Reproduction can be sexual or asexual.

Exam 31: Animals: the Invertebrates

List the five features that have contributed to the success of the arthropods.

What part of a tapeworm contains both male and female sex organs and becomes filled with developing embryos?

The term deuterostome refers to

A closed circulatory system is found in

Which statement about echinoderms is inaccurate?

Filter feeders are

Identify the features unique to the molluscs.

Which statement about arachnids is inaccurate?

Which of the following is a feature of arthropods?

Echinoderms and cnidarians

Which of the following is classified as a flatworm?

Which type of organism is characterized by having jointed appendages, ability to molt, and three sets of fused segments?

The following statements refer specifically to sponges, specifically to cnidarians, or to both sponges and cnidarians. Which statement applies specifically to cnidarians?

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