Question

1- In this filter feeding worm-like nonvertebrate chordate, the four unique embryonic structures persist into adulthood.
Group of answer choices

lancelet

tunicate

lamprey

hagfish

2- In this suspension feeding nonvertebrate chordate, the tail, notochord and the dorsal, hollow nerve cord all cease to exist in the adult animal.
Group of answer choices

tunicate

lancelet

lamprey

hagfish

3- These vertebrate fishes do not have a jaw.
Group of answer choices

lamprey and hagfish

sharks and rays

lungfishes

lancelet and tunicate

4- These jawed fishes endoskeleton is made entirely of cartilage.
Group of answer choices

sharks, rays, skates and ratfish

lamprey and hagfish

coelocanth and lungfish

goldfish and salmon

5- What two unique features do all (and only)mammals share?
Group of answer choices

hair and mammary glands

teeth and four chambered heart

endothermic and closed circulatory system

vertebrae and thoracic breathing

6- These aquatic filter feeding animals lack true tissues and organ systems.
Group of answer choices

sponges

jellies

sea stars

polycheate worms

7- These radially symmetrical aquatic animals have a specialized cell used for defense and prey capture that is unique to these animals.
Group of answer choices

jellies, hydra, coral and sea anemones

sponges

polycheate worms

crustaceans

8- These animals have little hair-like bristles that assist them in digging and anchoring and parapodia appendages on most of their segment which are used for crawling, swimming and anchoring.
Group of answer choices

polychaete worms

roundworms

flatworms

sea cucumbers

Answer 1

ANSWER :

1. Lancelets are also known as amphioxus, which include in the subclass subphylum cephalochordata, and are filter feeding worm like invertebrate chordates. In lancelets, some unique embryonic structures persist till their adulthood.

2. The tunicates are suspension feeding nonvertebrate chordate of marine ecosystem, which have the tail, notochord and the dorsal, hollow nerve cord (embryonic structures), lead to cease all to exist in the adult animal.

3. The hagfish and lamprey fish are included in the "Agatha" group of pisces, that do not have jaw and known as jawless fishes. Hence these obtain their nutrients via sucking blood of other aquatic animals and fish.

4. Chondrichthyes is a group of jawed fishes their endoskeleton made up of cartilage rather than bones. They are mainly classified into two major subclasses; Elasnobranchii and Holocephali. Example :- Sharks, Ray fish, Skate fish etc.