18 Questions for Review n cartilaginous and jpwiess fishes and represent an evol

Question

18 Questions for Review n cartilaginous and jpwiess fishes and represent an evolutionary advancement seen in bony fish alow a bony fish to pass water over its gils while the fish remains stationaty? Why would this be Opercula are absent i viewed as an adaptation? 2 The swim biladder s another evolutionary advancement in bony fish. What advantages do fish with swim biadders have? 3 What anatomical evidence supports the con t tention that fish have keen senses of vision and smell? 4 Match the structures on the left with the systems to which they belong on the right. (Some letters will be used more than once) gills liver pyloric ceca kidney gonad b. excretory c. digestive d. respiratory e. dirculatory ureter spleen urinary bladder Ray-finned FishesCHAPTER

Explanation / Answer

1. In stationary phase the fish is still able to get water passed over the gills due to operculum. This is because operculum covers each gill and acts as a movable flap. This movable flap is responsible for pumping water over the gills. It is an adaptation because it is not found in all fishes but in bony fish so that it can allow water passage even when the fish is stationary.

2. With the presence of swim bladder bony fish is able to be neutrally buoyant in water column. Swim bladder also serves as a means of gas exchange apart from the primary source.

3. The head of fish possess two external nostrils as well as eyes that do not possess any eyelids are anatomical evidence.

4. The structures are matched as follows:
Gills- Respiratory
Liver- Digestive
Pyloric ceca- Digestive
Kidney- Excretory
Gonad- Reproductive
Ureter- Excretory
Spleen- Circulatory
Urinary bladder- Excretory

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.