Bio Lab: Inverts IV Quiz

What appendages on the crayfish have been specialized and what is their function?

- chelipeds (large claws) for defense and grasping

- maxillipeds for food handiling

- swimmerets modified for reproduction

Name 3 insects that undergo complete metamorphosis.

- Beetles, Butterfly, Bees/Wasp

Name 3 insects that undergo incomplete metamorphosis.

-Grasshoppers, Crickets, Katydids

Are insects seperate male and female?

- yes

What does the word Antrhopoda translate to?

"Jointed appendages"

What are 3 adaptations that have helped Arthropods become the most successful group of animals?

- Exoskeleton

- Segmentation

- Jointed appendages

What are 3 functions of the exoskeleton?

- Waterproof

- structure

- protection

What is one disadvantage of having an exoskeleton?

vulnerable between molts and breathing issues

What is the difference between incomplete and complete metamorphosis?

-Incomplete nymphs resemble adults but are smaller, molting until maturity, while complete their larval stage and the pupal stage

Complete metamorphosis is energetically expensive, what is the advantage of using so much energy to transform the body?

- it eliminates the competition of resources between young and old

Do insects reproduce sexually?

- yes

Do insects have internal or external fertilization?

- internal fertilization

What does Echinodermata directly translate to?

- "spiny skin"

Sea stars are members of Echinodermata, what are 3 other animals that are members of this Phylum?

- Sea urchins

- sand dollars

- sea cucumbers

What makes Echinodermata the most closely realted Phylum to vertebrates?

- Deutrostome is present in both

What is the body symmetry of Echinoderms?

- Bilateral as larvae, radial as adults

How do sea stars feed?

- they invert their stomach secret digestive enzymes; external

What is the path of water through a sea star?

1. Madarporite

2. Stone Canal

2. Ring Canal

3. Radial Canal

4. Tube feet

What are 5 functions of the water vascular system?

1. Circulatory respiration

2. Gamtes expelled

3. Controls feed

4. locomotion

5. Excretion of Waste

Are sea stars separate male and female? (dioecious)

- Yes

Do sea stars reproduce sexually?

- No

Do sea stars have internal or external fertilization?

- External

Where would you look for the madreporite?

- on Aboral side (dorsal view)

What are ampullae?

- a small bulb-like muscular sac located inside the body at the top of each foot.

Crayfish and Sea stars are both aquatic invertebrates with a true coelom and complete digestive tract. What are 3 differences in these animals?

- Crayfish have jointed appendages, bilateral symmetry throughout, and a protostome.

- Sea stars do not have: jointed appendages, no bilateral symmetry fully throughout, and instead are deutrostome.

Crayfish belong to the Arthropod group known as __________, meaning "10 legs", whereas insects belong to _________, meaning "6 legs".

- Decapoda

- Hexapoda

Echinoderms are __________ symmetrical and the second opening to develop is the mouth, so they are ___________.

- bilateral/ larvae and radial/ adult

- deutrostome

Arthropoda is a very successful group of animals, often attributed to their __________ & ___________.

- exoskeleton

- segmenation

Centipedes and millipedes belong to a group of Arthropods known as _____________>

-Myriapods

The ________ connects the madrepoite to the ring canal in the water vascular system.

- stone canal

Grasshoppers have special organs for sensing sounds and vibrations called ____________.

- Tympanum

The opening where water enters the water vascular system in sea stars is the _______________.

- Madraporite

The _____________________________ is responsible for circulation, respirationm and the hydrostatic presure needed fro mobility in starfish and sea urchins?

- water vascular system

Echinoderms have an internal skeleton made of calcaerous plates called _________

- ossicles

Mollusca, Annelida, Arthropoda, and Echinodermata have body cavities that are completley lined with _________, so they are coelomate.

- mesoderm

Mollusca, Annelida and Arthropoda all have an open circulatory system.

FALSE

Sea stars are predators and digest their food externally

TRUE

Grasshoppers undergo metamorphosis and need a pupal stage to become adults

FALSE

Echinoderms and Arthropods have an exoskeleton made of chtin

FALSE

The mouth of a starfish is always located on the ventral surface

TRUE

Arthropods are bilaterally symmetrical, triploblastic protostomes

TRUE

Deutrostome means the first opening to form during development is the anus

TRUE

Water enters the water vascular system on the aboral surface of the starfish

TRUE

Crayfish are predators and typically hunt for bivalves

FALSE

Mobile organisms usually have bilateral symmetry

TRUE

Echinoderms are radially symmetrical, marine-living, triploblastic protostomes.

FALSE

Insects' wings are modified appendages used for flying

FALSE

Some Echinoderms and some Arthropods undergo metamorphosis

TRUE

Fertilization usually occurs inside the female Echinoderms.

FALSE

In Hexapods, an incomplete life cycle means the females fail to lay eggs

FALSE

Arthropods and echinoderms are usually dioecious

TRUE

All arthropods breathe through holes called spiracles.

FALSE

Barnacles and scorpions belong to the Phylum Arthropoda

TRUE

Tube feet have strong muscles since they can open clams

FALSE

Echinoderms are bilaterally symmetrical as larvae

TRUE

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