d. Recognize coelomates, acoelomates, and pseu he closest relative of various oc

Question

d. Recognize coelomates, acoelomates, and pseu he closest relative of various ocoelomates Ch 33 Invertebrates 1. Know characteristics of the invertebrates we studied in lab ollusca, Annelida, Arthropoda. Echinodermata) from chart Ch 34 Origin of vertebrates 1. 2 phylogeny of Living Chordates ofclades a. Be able to determine closest relatives and characteristics in the tree 2. Be able to describe the four characteristics of chordates. 3. Compare and contrast the characteristics of amniotes, mammals, 4. primates, early human ancestors and the genus Figure Be able to draw conclusions about early human ancestors using 34.45 Ch 47 Animal Development 1. Describe the stages of development in an animal (fertilization, cleavage, gastrulation, organogenesis) 2. Recognize the placement of ectoderm, endoderm and mesoderm in a gastrula 3. Describe the function of the four extraembryonic membranes in amniotes

Explanation / Answer

33)

Charcteristics of invertebrates:

Mollusca: The body has a head, a foot and a visceral mass, all covered with a mantle. The radula is used for feeding and the ventral foot is used in locomotion. In molluscs, the coelom is reduced and represented by the kidneys, gonads, and pericardium. examples are snails and oysters.

Annalida: They are the segmented worms. They have many bristles in their body. They have no legs and no hard skeleton. Earthworm and leeches belong to annalida.

Arthropoda: They are widely distributed throughout the globe and adapted to survive in adverse environmental conditions. Insects like cockroaches and crustaceans form arthropoda. They have a stiff cuticle made of chitin forming an exoskeleton. They have segmented bodies made of head and abdomen. They have distinctive jointed appendages.

Echinoderm: Starfish is an example for echinoderm. They do not have representatives in freshwater and land. Most echinoderms are pentameral having fivefold symmetry.

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