Exam 3

Question 1

In insect/animal development what do hox gene do?

Answer 1

Control morphology and number of flagella

Question 2

What do all animal have in common?

Answer 2

Hox genes

Question 3

What is the significance of flagellated protists?

Answer 3

They are the common ancestor of living animals-resembled modern protists

Question 4

What is the significance of the Cambrian period and today’s animals?

Answer 4

No hard tissue plants- Cambrian Period

Question 5

What would you not expect to find in the Ediacaran period?

Answer 5

There weren’t plants. Soft tissue only

Question 6

During the Cambrian Radiation, waht genetic process was most helpful?

Answer 6

Gene Duplication

Question 7

How would an organism with radial symmetry move?

Answer 7

Drifting

Question 8

What are four definitive characteristics of a sponge?

Answer 8

• Asymmetrical
• No organs
• Muscles
• Nerves

Question 9

What groups contain diploblastic organisms?

Answer 9

Cnidarians, Jellies, sponges

Question 10

What groups contain deuterostomes?

Answer 10

Echinoderms, reptiles and amphibians

Question 11

When does the blastospore first appear?

Answer 11

Gastrulation

Question 12

___________ are spiral and determinate

Answer 12

protostomes

Question 13

What are the characteristics of ecdysozoans

Answer 13

Shed exoskeleton (molting/echdysis)

Question 14

Echinoderms and chordates are _____________

Answer 14

Deuterostomes

Question 15

What factors five influenced the cambrian explosion?

Answer 15

• Predation
• O2 rich environment
• Duplication(Hox genes)
• Endo/Exo. Skeletons
• Different modes of locomotion

Question 16

What do sponges lack that other animal phyla have?

Answer 16

Symmetry and true tissue

Question 17

What are choanocytes?

Answer 17

Cells in sponge, generate water current and ingest suspended food

Question 18

What are amoebocytes?

Answer 18

Found in most animal cells. Help digest and build structureal materials. Chitin spongin calcium carbonate

Question 19

What are cribostatin?

Answer 19

Found in sponges. Create antibiotics

Question 20

Describe the basic body plan of a Cnidarian (jellyfish):

Answer 20

A sac with a gastro vascular cavity, single opening (mouth/anus) 2 types medus and polyp

Question 21

A ________ has tentacles armed with Cnidocytes,cells that defend and capture prey, and Nematocysts, organelles within cnidocytes that eject stinging thread

Answer 21

Cnidaria

Question 22

What members of Cnidaria only occur as polyps?

Answer 22

Anthozoa

Question 23

What are scyphozoan

Answer 23

Jellies, (no pollyps, free swimming)

Question 24

This flatworm, ___________, is not parasitic

Answer 24

Tubellarian

Question 25

What is the intermediate for blood fluke infection?

Answer 25

Snails, freshwater, rice field

Question 26

What symptoms are typical from tapeworm infection?/How do you get it?

Answer 26

Weight loss and fatigue, eating uncooked meat

Question 27

WHat re the characteristics of a Rotifera?

Answer 27

They reproduce by parthenogenesis, females produce offspring from unfertilized eggs

Question 28

How does a tapeworm obtain nutrients?

Answer 28

From host intestine because they lack digestive system. Eggs dispersed by host feces

Question 29

What are the characteristics of mollusk development?

Answer 29

From blastospore. Have visceral mas, muscular foot, and mantle

Question 30

What is a lophophore used for?

Answer 30

Eating (in clams)

Question 31

What molluscan ungoes embyronic torsion?

Answer 31

Gastropoda

Question 32

What classes use radula?

Answer 32

gastropod, cephalophod

Question 33

How do byvalves feed? (clams)

Answer 33

Suspension feeders

Question 34

What class releases anticoagulants and was used medically?

Answer 34

Hirundinia (Leeches)

Question 35

What are the characteristics of a nematode?

Answer 35

Roundworms, found in aquatic habitats, lack circulatory systems

Question 36

All ___________ have jointed appendages, bilateral summetry, less segments than appendages, biggest animal phylum, most successful group on earth, open circulatory system, molts.

Answer 36

Arthropods (insects)

Question 37

What is Chelicera?

Answer 37

Claw-like feeding appendages

Question 38

What has TWO pairs of jointed appendages per body segment?

Answer 38

Millipede

Question 39

What is the difference between complete and incomplete metamorphosis?

Answer 39

Complete:Mature don't look like young (butterfly)

Question 40

What has two pairs of antenna?

Answer 40

Crestaceans

Question 41

What are echinoderms?

Answer 41

Deuterostomes, water vascular system (starfish)

Question 42

Name 2 characteristics of arthropods

Answer 42

- Open circulatory system | - Molting/Ecdysis

Question 43

Echinodermata 3 characteristics

Answer 43

Deuterostomes, radial cleavage, pentaradial symmetry, tube feet

Question 44

What role does the vascualr system play in echinoderms?

Answer 44

Locomotion, feeding, gas exchange

Question 45

What do all chordates have?

Answer 45

hollow nerve cord, post-anal tail, notochord, pharyngeal slits/clefts

Question 46

Describe chordate development

Answer 46

1-Nerve chord 2-notochord 3-Pharyngeal slits 4- Post anal tail

Question 47

What were Chordate pharyngeal slits first used for?

Answer 47

Suspension feeding

Question 48

What are cephalochordates?

Answer 48

Intermediat and immediate ancestor of fish

Question 49

What are the significance of lancets?

Answer 49

Resesmbe early chordates tunicates or sea squirts

Question 50

What do hagfish and lampreys have in common?

Answer 50

Neither have a jaw

Question 51

What group/phylum did jaws first appear?

Answer 51

Acanthodi