Animal Diversity

Question 1

Describe the cleavage in deuterostome development

Answer 1

Radial and indeterminate

Question 2

Describe the cleavage in protostome development

Answer 2

Spiral and determinate

Question 3

Name the two variations on the cnidarian body plan

Answer 3

1) sessile polyp

2) motile medusa

Question 4

Name six types of organism in phylum Mollusca

Answer 4

Snails, slugs, squids, oysters, clams, octopuses

Question 5

Three main body parts of molluscs

Answer 5

1) muscular foot
2) visceral mass
3) mantle

Question 6

Main body parts of arthropods

Answer 6

Hard exoskeleton, segmented body, jointed appendages

Question 7

Four main lineages of arthropods

Answer 7

1) Cheliceriforms e.g spiders
2) Myriapods e.g centipede
3) Hexapods e.g insects
4) Crustaceans e.g crabs

Question 8

Describe the unique water vascular system of echinoderms

Answer 8

A network of hydraulic canals branching into tube feet that function in locomotion, feeding and gas exchange

Question 9

Four key characteristics of chordates

Answer 9

Notochord, dorsal hollow nerve chord, pharyngeal slits/clefts, muscular post-anal tail

Question 10

What class of chordates are sharks, rays and skates in?

Answer 10

Class Chondrichthyes

Question 11

Amniotes

Answer 11

Tetrapods that have a terrestrially adapted egg e.g reptiles and mammals