Question 1

There are no parasitic crustaceans.

Accepted Answer

There are parasitic crustaceans, such as the fish louse and the crab louse.

Question 2

The two body forms of some Radiata is an example of alternation of generations.

Accepted Answer

The two body forms of some Radiata (polyp and medusa) represent different stages in their life cycle, but this is not considered alternation of generations. Alternation of generations refers to the occurrence of both sexual and asexual reproductive phases in an organism's life cycle, typically seen in plants and some algae, not the different morphological stages seen in Radiata.

Question 3

Each arm of the starfish differs internally,one being specialized for reproduction,another for respiration,a third for digestion,a fourth for the water vascular system,and the fifth for the nervous and circulatory systems.

Accepted Answer

Starfish arms are not specialized in this manner; each arm generally contains components of all the major systems (reproductive, respiratory, digestive, water vascular, nervous, and circulatory systems), and they are not divided by function among the different arms.

Question 4

All Platyhelminthes are parasitic.

Accepted Answer

Although many Platyhelminthes (flatworms) are parasitic, not all of them are. Some Platyhelminthes are free-living and live in freshwater or marine environments. Examples of free-living Platyhelminthes include planarians and some species of flatworms.

Question 5

Millipedes have a thousand legs whereas centipedes have only a hundred legs.

Accepted Answer

Despite their names, millipedes and centipedes do not have a thousand or a hundred legs, respectively. Millipedes generally have fewer than 400 legs, and centipedes have fewer than 100 legs, with the number of legs varying among species within each group.

Question 6

What would be necessary for a sponge to survive if it had a reduced number of choanocytes?
A)Phagocytic food gathering would have to increase.
B)The outer protective layer would need to thicken.
C)Intracellular digestion by choanocytes would have to increase.
D)Spicule production by amoebocytes would have to increase.

Accepted Answer

Phagocytic food gathering would have to increase because choanocytes are responsible for capturing food particles, so with fewer choanocytes, other cells would need to compensate by increasing their food gathering activity.

Question 7

The invertebrate group most closely related to the vertebrates is the
A)EchinodermatA.
B)Urochordata.
C)Cephalochordata.
D)Ophiouroidea.
E)Notochordata.

Accepted Answer

The answer of The invertebrate group most closely related to...

Question 8

Although a medusa and a polyp look different,they have similar body plans.

Accepted Answer

Both a medusa and a polyp are cnidarians with radial symmetry and have tentacles around their central mouth. Despite their different physical appearances, they are similar in their basic body plan.

Question 9

A sea star suffers from an infection that affects its ampullae.Due to the infection,the ampullae no long function.What do you predict will be the effect on the sea star.
A)No noticeable effect will occur.
B)The sea star will be unable to reproduce.
C)The sea star will be unable to extend its tube feet.
D)The sea star will be unable to store energy.

Accepted Answer

The ampullae are part of the water vascular system in sea stars that help in the extension and retraction of their tube feet. These tube feet are important for locomotion, feeding, and respiration. Thus, if the ampullae are not functioning, the sea star will be unable to extend its tube feet, leading to a significant impact on its ability to carry out essential physiological activities.

Question 10

Echinoderms have an exoskeleton.

Accepted Answer

Echinoderms do not have an exoskeleton. Instead, they have an endoskeleton made of calcified plates or ossicles.

Question 11

Despite your best attempts to convince her otherwise,your friend is very afraid of spiders and all "bugs," which to her means insects.When you note that spiders are not insects,she claims they are the same thing.You finally convince her that spiders are not insects because,for one thing,spiders
A)lack an exoskeleton.
B)have a calcium-carbonate layer outside the exoskeleton.
C)are segmented.
D)have two body segments joined by a pedicel.

Accepted Answer

Spiders are not insects because they have two body segments (cephalothorax and abdomen) joined by a pedicel, while insects have three body segments (head, thorax, and abdomen) and no pedicel. A, B, and C are incorrect choices because they do not differentiate spiders from insects.

Question 12

What is the route of water in the water vascular system of a starfish?
A)Water enters through the madreporite into the ring canal and from thence into the radial canals to the ampullae and finally into the tube feet.
B)Water enters the madreporite into the radial canals and from thence into the ring canal,then the ampullae and finally into the tube feet.
C)Water enters the madreporite into the ampullae and from thence into the ring canal,then the radial canals to the ampullae and finally into the tube feet.
D)Water enters the ampullae and then goes to the tube feet and from thence to the radial canals,then the ring canal,and finally exits through the madreporite.
E)Water enters the ring canal,then goes into the radial canals,and finally through the madreporite to the ampullae and tube feet.

Accepted Answer

Water enters through the madreporite into the ring canal and from thence into the radial canals to the ampullae and finally into the tube feet. This is the correct route of the water in the water vascular system of a starfish.

Question 13

The change of a larval form of insect to a different adult form is known as
A)tagmosis.
B)incomplete metamorphosis.
C)complete metamorphosis.
D)an instar.
E)a chrysalis.

Accepted Answer

The change from a larval form to a different adult form is a process called metamorphosis. In insects, there are two types of metamorphosis: incomplete metamorphosis and complete metamorphosis. Incomplete metamorphosis involves gradual changes in form, with the immature stage called a nymph or a naiad, resembling the adult but smaller and lacking wings. Complete metamorphosis involves a radical change in form, with the immature stage being a larva and the adult stage being a completely different form. Therefore, option C is the best choice because it accurately describes the process of complete metamorphosis.

Question 14

The diversification of insects is related to the diversification of food sources in the environment.

Accepted Answer

Insects have diversified to exploit various food sources available in the environment, including plants, fungi, dead and decaying matter, and other animals. The availability and diversity of these food sources have driven the evolution of different feeding strategies and morphological adaptations in insects.

Question 15

Scorpions do not lay eggs but rather give birth to live young.

Accepted Answer

Scorpions belong to a group of animals known as viviparous animals, meaning they give birth to live young rather than laying eggs.

Question 16

Some vertebrates like frogs and humans do not have a conspicuous tail,yet even humans have the remnants of one known as the
A)sacrum.
B)lumbar.
C)fundus.
D)coccyx.

Accepted Answer

The coccyx is a small bone at the bottom of the vertebral column in humans and other primates. It is considered the vestigial tailbone and is a remnant of the tail that other animals, such as monkeys and dogs, still have. The sacrum and lumbar are part of the vertebral column but are not considered remnants of the tail. The fundus is a term used in anatomy but is not related to the tail.

Question 17

Your lab group is assigned an unknown organism to identify to the level of phylum.You have it narrowed down to either Phylum Porifera or Phylum Cnidaria.Which feature would allow you to identify the phylum of your unknown creature?
A)presence of a central cavity
B)presence of epidermal covering
C)presence of one large external opening
D)presence of pores
E)presence of flagellated cells

Accepted Answer

The answer of Your lab group is assigned an unknown...

Question 18

You are presented with an animal that resembles a jellyfish.As you examine it further,what characteristic would allow you to conclude that it belongs to the Phylum Ctenophora rather than the Phylum Cnidaria?
A)complete digestive tract
B)tentacles
C)gonads
D)stinging cells

Accepted Answer

The answer of You are presented with an animal that...

Question 19

Predict what would happen to a sponge that could no longer produce spicules.
A)Intracellular digestion would cease.
B)Water circulation would be greatly impeded.
C)Gametes could no longer be produced.
D)Vulnerability to predation would increase.

Accepted Answer

The answer of Predict what would happen to a sponge...

Question 20

Match between columns
                        Premises: Gastropoda
Polyplacophora
Bivalvia
Cephalopoda

Accepted Answer

The Answer of clams and chitons and snails and nautili is...

Quiz 25: Animal Diversity: Invertebrates

There are no parasitic crustaceans.

The two body forms of some Radiata is an example of alternation of generations.

Each arm of the starfish differs internally,one being specialized for reproduction,another for respiration,a third for digestion,a fourth for the water vascular system,and the fifth for the nervous and circulatory systems.

All Platyhelminthes are parasitic.

Millipedes have a thousand legs whereas centipedes have only a hundred legs.

What would be necessary for a sponge to survive if it had a reduced number of choanocytes?

The invertebrate group most closely related to the vertebrates is the

Although a medusa and a polyp look different,they have similar body plans.

A sea star suffers from an infection that affects its ampullae.Due to the infection,the ampullae no long function.What do you predict will be the effect on the sea star.

Echinoderms have an exoskeleton.

Despite your best attempts to convince her otherwise,your friend is very afraid of spiders and all "bugs," which to her means insects.When you note that spiders are not insects,she claims they are the same thing.You finally convince her that spiders are not insects because,for one thing,spiders

What is the route of water in the water vascular system of a starfish?

The change of a larval form of insect to a different adult form is known as

The diversification of insects is related to the diversification of food sources in the environment.

Scorpions do not lay eggs but rather give birth to live young.

Some vertebrates like frogs and humans do not have a conspicuous tail,yet even humans have the remnants of one known as the

Your lab group is assigned an unknown organism to identify to the level of phylum.You have it narrowed down to either Phylum Porifera or Phylum Cnidaria.Which feature would allow you to identify the phylum of your unknown creature?

You are presented with an animal that resembles a jellyfish.As you examine it further,what characteristic would allow you to conclude that it belongs to the Phylum Ctenophora rather than the Phylum Cnidaria?

Predict what would happen to a sponge that could no longer produce spicules.

Match each mollusk with the correct taxonomic class.