Question 1

Some animals have no body symmetry or have __________ symmetry like spokes on a wheel.

Accepted Answer

The answer of Some animals have no body symmetry or...

Question 2

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Although most members are enclosed by hardened shells,this phylum name literally means "soft body."

Accepted Answer

The phylum Mollusca is known for having a soft body, despite the fact that many members have shells. Annelida (segmented worms), Arthropoda (insects, spiders, crustaceans, etc.), Echinodermata (starfish, sea urchins, etc.), and Cnidaria (jellyfish, corals, etc.) do not have this specific characteristic as their defining feature.

Question 3

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Members of this phylum have a brain with a ventral nerve cord,a complete gut,and a circulatory system that is usually closed.

Accepted Answer

Annelida is the best choice as it is the only phylum listed that has all three characteristics mentioned - a brain with ventral nerve cord, a complete gut, and a circulatory system that is usually closed. Porifera does not have a true nervous system, while Cnidaria, Platyhelminthes, and Nematoda do not have a complete circulatory system.

Question 4

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-This phylum has the greatest number of species.

Accepted Answer

Arthropoda is the phylum with the greatest number of species, containing over one million described species.

Question 5

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-This phylum has no tissues or organs.

Accepted Answer

Porifera, also known as sponges, lack true tissues and organs, instead consisting of a loose aggregation of cells.

Question 6

Choose the most appropriate answer for each.
-sponges

Accepted Answer

Sponges are sessile suspension feeders.

Answer: NA
 None of the given choices match sponges, so NA or None Applicable is the answer.

Question 7

Choose the most appropriate answer for each.
-echinoderms

Accepted Answer

Sea urchins and sea stars are both examples of echinoderms.

Question 8

Choose the most appropriate answer for each.
-mollusks

Accepted Answer

Mollusks are a diverse group of animals that include snails, squids, and clams.

Answer: G 
 Some mollusks are sessile suspension feeders, meaning they filter food particles out of the water.

Answer: K 
 Sea urchins and sea stars are echinoderms, not mollusks.

Therefore, the best choices are E and G.

Question 9

Choose the most appropriate answer for each.
-This group includes a transparent species that is used as model animal in developmental biology studies

Accepted Answer

Nematodes, specifically the species Caenorhabditis elegans, are widely used in developmental biology and genetics research due to their transparency, simplicity, and well-mapped genome.

Question 10

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Tapeworms are members of this phylum.

Accepted Answer

Tapeworms are members of Phylum Platyhelminthes, which includes flatworms such as tapeworms, flukes, and planarians.

Question 11

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Members of this phylum have a pseudocoelomic cavity.

Accepted Answer

Only Nematoda have a pseudocoelomic cavity. Porifera does not have a true body cavity, while Cnidaria, Platyhelminthes, and Annelida have a true coelom.

Question 12

Choose the most appropriate answer for each.
-chelicerates

Accepted Answer

Chelicerates are a subphylum of arthropods, including spiders, scorpions, ticks, and mites.

Answer: I 
 Crustaceans, ticks, and insects are all examples of arthropods.

Answer: K 
 Sea urchins and sea stars are both examples of echinoderms, which are marine invertebrates that belong to the phylum Echinodermata.

Note: The other options are not related to chelicerates. Planarians, flukes, and tapeworms are flatworms (phylum Platyhelminthes), nematodes are roundworms (phylum Nematoda), snails, squids, and clams are mollusks (phylum Mollusca), sessile suspension feeders can refer to various groups (e.g. sponges, bryozoans), and jellyfish and corals are cnidarians (phylum Cnidaria), while polychaetes, earthworms, and leeches are annelids (phylum Annelida).

Question 13

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Members of this phylum use tentacles to push captured prey through the mouth into their gastrovascular cavity.

Accepted Answer

Members of the phylum Cnidaria, such as jellyfish and coral, have tentacles that contain stinging cells called nematocysts. These tentacles are used to capture prey and push them into the gastrovascular cavity, where digestion takes place.

Question 14

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Members of this group have a brain with nerve cords,have a saclike or branched gut,and lack a circulatory system.

Accepted Answer

Platyhelminthes (flatworms) have a brain with nerve cords, a saclike or branched gut, and lack a circulatory system, fitting the description provided.

Question 15

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-Trilobites were members of this phylum.

Accepted Answer

Trilobites were ancient arthropods and belonged to the phylum Arthropoda.

Question 16

Choose the most appropriate answer for each.
-cnidarians

Accepted Answer

Cnidarians are a phylum that includes jellyfish and corals.

Answer: F
 Mollusca is a phylum that includes snails, squids, and clams.

Answer: G
 Sessile suspension feeders are organisms that attach to a surface and filter food from the water. Many cnidarians, such as coral, are sessile suspension feeders.

Answer: K
 Sea urchins and sea stars are both echinoderms.

Question 17

Choose the most appropriate answer for each.
-flatworms

Accepted Answer

Flatworms include planarians, flukes, and tapeworms.

Answer: J
 Polychaetes, earthworms, and leeches are types of annelids, which are segmented worms.

Answer: K
 Sea urchins and sea stars are echinoderms.

Answer: D
 Nematodes are roundworms.

Answer: E
 Snails, squids, and clams are mollusks.

Answer: F
 Mollusca is the phylum that includes snails, squids, and clams.

Answer: H
 Jellyfish and corals are cnidarians.

Answer: I
 Crustaceans, ticks, and insects are all arthropods.

Answer: G
 Sessile suspension feeders are organisms that remain attached to a surface and filter food particles from the water around them. Examples include barnacles and bivalves.

Question 18

Classification. Respond to the following statements in reference to the five animal phyla listed below.
-The larval stage in this phylum has bilateral symmetry,whereas the adult stage exhibits radial symmetry.

Accepted Answer

The statement describes the characteristics of Echinodermata, which have a larval stage with bilateral symmetry and an adult stage with radial symmetry.

Question 19

Choose the most appropriate answer for each.
-chitons,gastropods,bivalves,and cephalopods

Accepted Answer

The answer of Choose the most appropriate answer for each.
-chitons,gastropods,bivalves,and...

Question 20

__________ are multicelled heterotrophs without cell walls.

Accepted Answer

The answer of __________ are multicelled heterotrophs without cell walls....

Quiz 24: Animal Evolution: The Invertebrates

Some animals have no body symmetry or have __________ symmetry like spokes on a wheel.

Classification. Respond to the following statements in reference to the five animal phyla listed below. -Although most members are enclosed by hardened shells,this phylum name literally means "soft body."

Classification. Respond to the following statements in reference to the five animal phyla listed below. -Members of this phylum have a brain with a ventral nerve cord,a complete gut,and a circulatory system that is usually closed.

Classification. Respond to the following statements in reference to the five animal phyla listed below. -This phylum has the greatest number of species.

Classification. Respond to the following statements in reference to the five animal phyla listed below. -This phylum has no tissues or organs.

Choose the most appropriate answer for each. -sponges

Choose the most appropriate answer for each. -echinoderms

Choose the most appropriate answer for each. -mollusks

Choose the most appropriate answer for each. -This group includes a transparent species that is used as model animal in developmental biology studies

Classification. Respond to the following statements in reference to the five animal phyla listed below. -Tapeworms are members of this phylum.

Classification. Respond to the following statements in reference to the five animal phyla listed below. -Members of this phylum have a pseudocoelomic cavity.

Choose the most appropriate answer for each. -chelicerates

Classification. Respond to the following statements in reference to the five animal phyla listed below. -Members of this phylum use tentacles to push captured prey through the mouth into their gastrovascular cavity.

Classification. Respond to the following statements in reference to the five animal phyla listed below. -Members of this group have a brain with nerve cords,have a saclike or branched gut,and lack a circulatory system.

Classification. Respond to the following statements in reference to the five animal phyla listed below. -Trilobites were members of this phylum.

Choose the most appropriate answer for each. -cnidarians

Choose the most appropriate answer for each. -flatworms

Classification. Respond to the following statements in reference to the five animal phyla listed below. -The larval stage in this phylum has bilateral symmetry,whereas the adult stage exhibits radial symmetry.

Choose the most appropriate answer for each. -chitons,gastropods,bivalves,and cephalopods

__________ are multicelled heterotrophs without cell walls.