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Biology Revision II

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which organism

Echinoderms (sea stars)

What is the function of Aristotle's lantern? Who has it?

pecialized feeding apparatus in sea urchins

What is chorda dorsalis or notochord?

The notochord is a flexible, rod-like structure that supports the embryo in vertebrates, and in adults, its remnants persist as part of the intervertebral discs

Provide 3 characteristics of chordates:

Notochord, Pharyngeal slits, Post-anal tail, closed circulatory system,

What is Biological regression?

Larva (tunicates) is better developed than adult

Name cold blooded (Ectotherms) vertebrates (classes)

Chondrichthyes (cartilaginous fish, e.g. sharks, rays) Osteichthyes (bony fish) Amphibia (amphibians) Reptilia (reptiles)

What is difference between Oviparous, Ovoviviparous, Viviparous organisms?

Oviparous = lays eggs Ovoviviparous = Keep eggs inside their body until they hatch. Viviparous = live birth, direct nourishment

What is the material shark's skeleton is made of?

cartilage

Why are scales of the shark different?

they are made of dentin, like sandpaper

What is the function of lorenzini ampullae in sharks?

i allow sharks to detect weak electric fields in the water, helping them locate prey and navigate.

Name 5 species of sharks.

white, hammerhead,tiger,whale, basking shark

Name fins of the fish.

Dorsal fin (1 or 2) Tail (caudal) fin (1) Pectoral fins (2) Pelvic fins (2) Anal fin (1)

How do fish breath?

Fish breathe by drawing water into their mouth, passing it over the gill arches protected by the operculum, where oxygen is absorbed.

How many chambers does fish heart have?

Name 10 species of fish

who has Cutaneous respiration?

Amphibians