Unit 12 Phylum Chordata

1. What is the correct taxonomic classification of Lancelets?

Subphylum CephalochordataClass PteromyzontidaLancelets

Class Cephalochordata Phylum Pteromyzontida Lancelets

Phylum Chordata Order Pteromyzontida Lancelets

Order Cephalochordata Class Pteromyzontida Lancelets

Lancelets belong to the Subphylum Cephalochordata and the Class Pteromyzontida within the phylum Chordata.

Explanation

Lancelets belong to the Subphylum Cephalochordata and the Class Pteromyzontida within the phylum Chordata.

2. What is classified under Phylum Chordata?

Class Mammalia

Subphylum Arthropoda

Subphylum Urochordatasea pork

Order Squamata

Phylum Chordata includes animals with a notochord, dorsal nerve cord, pharyngeal slits, and a post-anal tail. Subphylum Urochordates are a group of animals within the phylum Chordata.

Explanation

Phylum Chordata includes animals with a notochord, dorsal nerve cord, pharyngeal slits, and a post-anal tail. Subphylum Urochordates are a group of animals within the phylum Chordata.

3. Phylum Chordata

Subphylum Annelida/PolycheataClass Polychaeta Marine worms/Errantia

Subphylum Vertebrata/CraniataClass Petromyzontida Lampreys/Ammocoetes

Subphylum Mollusca/GastropodaClass Gastropoda Snails/Helix

Subphylum Arthropoda/InsectaClass Insecta Beetles/Coleoptera

Phylum Chordata is a phylum of animals that includes vertebrates, which belong to the Subphylum Vertebrata. Lampreys and Ammocoetes are specific classes within this subphylum.

Explanation

Phylum Chordata is a phylum of animals that includes vertebrates, which belong to the Subphylum Vertebrata. Lampreys and Ammocoetes are specific classes within this subphylum.

4. Phylum Chordata

Subphylum Urochordata - Ascidia

Class Agnatha - Petromyzon

Class Osteichthyes - Salmo

Subphylum Vertebrata/CraniataClass Chondrichthyes ?Squalus

Phylum Chordata is a diverse group of animals that includes vertebrates, which are further classified into subphylum Vertebrata. The correct answer provides the specific class Chondrichthyes (cartilaginous fish) along with the example Squalus (dogfish shark). The incorrect answers include Class Agnatha (jawless fish) exemplified by Petromyzon (lamprey), Class Osteichthyes (bony fish) represented by Salmo (salmon), and Subphylum Urochordata (tunicates) which includes the example Ascidia (sea squirt).

Explanation

Phylum Chordata is a diverse group of animals that includes vertebrates, which are further classified into subphylum Vertebrata. The correct answer provides the specific class Chondrichthyes (cartilaginous fish) along with the example Squalus (dogfish shark). The incorrect answers include Class Agnatha (jawless fish) exemplified by Petromyzon (lamprey), Class Osteichthyes (bony fish) represented by Salmo (salmon), and Subphylum Urochordata (tunicates) which includes the example Ascidia (sea squirt).

5. What is the subphylum and class of a Perca fish?

Subphylum PlatyhelminthesClass TurbellariaPerca

Subphylum Mollusca/AnnelidaClass GastropodaPerca

Subphylum Vertebrata/CraniataClass ActinopterygiiPerca

Subphylum ArthropodaClass InsectaPerca

The correct answer provides the accurate classification of a Perca fish within the phylum Chordata, subphylum Vertebrata/Craniata, and class Actinopterygii.

Explanation

The correct answer provides the accurate classification of a Perca fish within the phylum Chordata, subphylum Vertebrata/Craniata, and class Actinopterygii.

6. What type of scales are found on the skin of sharks?

Class Chondrichthyes ?Squalus

Class Osteichthyes - Perca

Class Sarcopterygii - Latimeria

Class Agnatha - Petromyzon

Placoid scales are characteristic of sharks, rays, and skates which are all part of Class Chondrichthyes. Squalus is a specific genus of sharks.

Explanation

Placoid scales are characteristic of sharks, rays, and skates which are all part of Class Chondrichthyes. Squalus is a specific genus of sharks.

7. What class of fishes do Ganoid scales belong to?

Class Agnatha (jawless fishes)

Class Chondrichthyes (cartilaginous fishes)

Class Osteichthyes (bony fishes)

Class Actinopterygii(bony fishes)

Ganoid scales are specifically associated with bony fishes, which belong to the Class Actinopterygii. This class encompasses the majority of fish species with bony skeletons and fins supported by bony rays.

Explanation

Ganoid scales are specifically associated with bony fishes, which belong to the Class Actinopterygii. This class encompasses the majority of fish species with bony skeletons and fins supported by bony rays.

8. What type of scales are ctenoid scales?

Class Actinopterygii(bony fishes)

Class Chondrichthyes (cartilaginous fishes)

Class Agnatha (jawless fishes)

Class Osteichthyes (bony fishes)

Ctenoid scales are commonly found in bony fishes, belonging to the class Actinopterygii.

Explanation

Ctenoid scales are commonly found in bony fishes, belonging to the class Actinopterygii.

9. What class do Cycloid scales belong to?

Class Chondrichthyes(cartilaginous fishes)

Class Agnatha(jawless fishes)

Class Amphibia(amphibians)

Class Actinopterygii(bony fishes)

Cycloid scales are characteristic of bony fishes, which belong to the class Actinopterygii. Actinopterygii are a diverse group of fishes known for their bony skeletons and the presence of a swim bladder for buoyancy control.

Explanation

Cycloid scales are characteristic of bony fishes, which belong to the class Actinopterygii. Actinopterygii are a diverse group of fishes known for their bony skeletons and the presence of a swim bladder for buoyancy control.