Lab 5 - Invert Necessities

Question 1

Annelida

Answer 1

Large phylum(17000species) composed of segmented worms. Some organs repeat in segments

Earthworms, leeches, polychaee worms

Coelomates.

Question 2

Anthropoda

Answer 2

1 million species.

All members have jointed appendages, an exoskeleton, and a segmented body.

Spiders, scorpions, horseshoe crabs, centipedes, millipedes, insects, crabs, crayfish, lobsters, shrimp, barnacles, copepodes.

Question 3

Cnidaria

Answer 3

9000 aquatic species.

Stinging cells(cnidocytes).

Jellyfish, Hydra, Anemones, and corals.

Question 4

Echinodermata

Answer 4

7000 marine species.

Starfish, brittle stars, sea urchins, sand dollars, sea cucumbers, crinoids.

“Spiny skins”

Question 5

Mollusca

Answer 5

93000 species.

Large cavity for breathing and excretion and lined with a tissue(“mantle”). 2-3 nerve chords.

Snails, slugs, clams, mussels, squids, octopuses.

Question 6

Nematoda

Answer 6

80000 species.

small narrow worms

1/5 parasitic.

Complete gut and longitudinal muscles

Pseudocoelomates.

Question 7

Platyhelminthes

Answer 7

20000 species.

No circulatory or respiratory organs.

Important human and animal parasites.

Tapeworms, flukes.

Acoelomates.

Question 8

Porifera

Answer 8

Sponges

Lack true tissues.

Unsure if monophyletic or not.

Question 9

Rotifera

Answer 9

2000 species

tiny aquatic pseudocoelomates with cilia surrounds the mouth that appear to rotate while breathing.

Pseudoceolomates.

Question 10

Body Cavity:

Coelomates

Answer 10

Fluid or Air filled body cavity completely lined body cavity.

located between the digestive system and the external body wall.

Surrounded 100% by the Mesoderm.

Question 11

Body Cavity:

Pseudocoelomates

Answer 11

Fluid or Air filled body cavity but it is lined with both Mesoderm and endoderm tissue.

Question 12

Body Cavity:

Acoelomates

Answer 12

Have no body cavity.

Question 13

Kingdom Animalia

Answer 13

Metazoa.

monophyletic group.