Q4 FINALS CHORDATES

In vertebrates, the notochord is mostly replaced by the:

• Skull

• Brain

• Vertebral column

• Nerve cord

Which structure becomes the brain in chordates?

• Anterior Dorsal nerve cord

• Dorsal nerve cord

• Notochord

• Endostyle

What structure in chordates is homologous to the thyroid gland?

• Notochord

• Pharyngeal pouch

• Endostyle

• Cloaca

The postanal tail in chordates is used for:

• Mating

• Waste removal

• Reproduction

• Propulsion

Which of the following lacks jaws and paired fins?

• Frogs

• Hagfish

• Sharks

• Bony fish

What enhances oxygen absorption in fish gills?

• Lung sacs

• Countercurrent exchange

• Spiracles

• Swim bladder

Sharks maintain buoyancy using:

• Air sacs

• Swim bladder

• Oil-filled liver

• Lungs

Which structure in bony fish controls buoyancy?

• Liver

• Gills

• Swim bladder

• Spleen

Fish with internal fertilization and live birth are called:

• Viviparous

• Oviparous

• Ovoviviparous

• Asexual

Amphibian skin is characterized as:

• Scaly and dry

• Thin and moist

• Covered in fur

• Hard and keratinized