Bio 160 Lab Exam 2

1. What are the characteristics of Phylum Annelida?

2. Incomplete digestive tract

1. Non-segmented worms

3. No excretory system

1. Segmented worms2. True coelem, complete digestive tract, usually closed circulatory system3. Nephridia for excretion4. Well-developed muscles5. Either dioecious or hermaphroditic

Phylum Annelida is characterized by segmented worms with a true coelom, complete digestive tract, usually a closed circulatory system, nephridia for excretion, well-developed muscles, and can be either dioecious or hermaphroditic.

Explanation

Phylum Annelida is characterized by segmented worms with a true coelom, complete digestive tract, usually a closed circulatory system, nephridia for excretion, well-developed muscles, and can be either dioecious or hermaphroditic.

2. What is the correct identification for Phylum Annelida, Class Polychaeta, Genus Arenicola?

Phylum: Annelida, Class Polychaeta, Genus: ArenicolaCommon Name: Lugworm

Common Name: Earthworm

Common Name: Bobbit Worm

Common Name: Tube Worm

The correct identification for Phylum Annelida, Class Polychaeta, Genus Arenicola is Lugworm, known for its unique burrowing behavior.

Explanation

The correct identification for Phylum Annelida, Class Polychaeta, Genus Arenicola is Lugworm, known for its unique burrowing behavior.

3. What are the characteristics of Class Polychaeta?

Polychaeta has no differentiation of body segments and lacks sensory appendages.

Polychaeta does not possess any respiratory organs or sensory appendages.

Polychaeta ("many long hairs"Many setae (bristles), usually protruding in bundles. Pronounced differentiation of some body segments, well-differentiated head with sensory appendages.Parapodia (lateral fleshy extensions) on most segments. Used for primitive gills or respiratory organs, anchors while in tubes, crawling, and swimming.

Polychaeta primarily relies on a hard exoskeleton for protection.

Class Polychaeta is characterized by many setae (bristles), pronounced differentiation of body segments, a well-differentiated head with sensory appendages, and parapodia on most segments. These features set Polychaeta apart from other classes of marine worms.

Explanation

Class Polychaeta is characterized by many setae (bristles), pronounced differentiation of body segments, a well-differentiated head with sensory appendages, and parapodia on most segments. These features set Polychaeta apart from other classes of marine worms.

4. What is the identification of the organism with the common name 'Clamworm'?

Phylum: Arthropoda, Class: Insecta, Genus: Drosophila

Phylum: Annelida, Class: Polychaeta, Genus: Nereis. Common name: Clamworm

Phylum: Mollusca, Class: Gastropoda, Genus: Helix

Phylum: Cnidaria, Class: Scyphozoa, Genus: Aurelia

The correct identification of the organism with the common name 'Clamworm' is Phylum: Annelida, Class: Polychaeta, Genus: Nereis. It is important to understand the taxonomy of various organisms for accurate identification.

Explanation

The correct identification of the organism with the common name 'Clamworm' is Phylum: Annelida, Class: Polychaeta, Genus: Nereis. It is important to understand the taxonomy of various organisms for accurate identification.

5. What are the characteristics of Class Hirudinea?

Hirudinea ("characterized by being a leech"1. No setae or parapodia2. Many transverse grooves, creating appearance of more segments than it actually has.3. Well-developed midgut with ceca (blind-ended pouches). Ceca allow for storage of food so the leech may be able to go months without eating.4. Have suckers.

Hirudinea does not have any specific characteristics that differentiate it from other classes of organisms.

Class Hirudinea has setae and parapodia, lacks transverse grooves, and does not have a well-developed midgut with ceca or suckers.

Members of Class Hirudinea have exoskeletons, jointed appendages, and undergo metamorphosis during their life cycle.

Hirudinea is a class of annelid worms commonly known as leeches. The correct characteristics include no setae or parapodia, transverse grooves, well-developed midgut with ceca, and suckers.

Explanation

Hirudinea is a class of annelid worms commonly known as leeches. The correct characteristics include no setae or parapodia, transverse grooves, well-developed midgut with ceca, and suckers.

6. What is the identification for a leech that is predatory and eats other leeches, oligochaetes, and snails?

Phylum: Arthropoda, Class: Insecta, Genus: Mosquito

Phylum: Chordata, Class: Reptilia, Genus: Python

Phylum: Mollusca, Class: Gastropoda, Genus: Lymnaea

Phylum: Annelida, Class: Hirudinea, Genus: HaemopisPredatory, eats other leeches, oligochaetes, and snails.

The correct identification for a predatory leech that feeds on other leeches, oligochaetes, and snails is in the Phylum Annelida, Class Hirudinea, Genus Haemopis.

Explanation

The correct identification for a predatory leech that feeds on other leeches, oligochaetes, and snails is in the Phylum Annelida, Class Hirudinea, Genus Haemopis.

7. What is the identification of the organism commonly known as the Medical leech, which is a parasitic species that primarily feeds on frog blood?

Phylum: Annelida, Class: Hirudinea, Phylum: Macrobdella, Species: Macrobdella decoraCommon name: Medical leechParasitic, feeds primarily on frog blood.

Phylum: Arthropoda, Class: Insecta, Species: Apis mellifera

Phylum: Mollusca, Class: Cephalopoda, Species: Octopus vulgaris

Phylum: Chordata, Class: Reptilia, Species: Python bivittatus

The correct identification for the Medical leech is in the Phylum Annelida, Class Hirudinea, Phylum Macrobdella, Species Macrobdella decora. This organism is known for its parasitic behavior and preference for frog blood.

Explanation

The correct identification for the Medical leech is in the Phylum Annelida, Class Hirudinea, Phylum Macrobdella, Species Macrobdella decora. This organism is known for its parasitic behavior and preference for frog blood.

8. What is the identification of an organism found in the nasal cavities of water birds like ducks and American coots that is a blood sucker?

Phylum: Mollusca, Class: Gastropoda, Genus: Biomphalaria

Phylum: Echinodermata, Class: Asteroidea, Genus: Asterias

Phylum: Arthropoda, Order: Diptera, Genus: Culicidae

Phylum: Annelida, Class: Hirudinea, Genus: TheromyzonFound in the nasal cavities of water birds like ducks and American coots. Blood sucker.

The correct answer describes a leech belonging to the Phylum Annelida, Class Hirudinea, Genus Theromyzon, which is known to live in the nasal cavities of certain water birds and feed on their blood. The incorrect answers represent organisms from different phyla and classes that are not associated with living in the nasal cavities of water birds as blood suckers.

Explanation

The correct answer describes a leech belonging to the Phylum Annelida, Class Hirudinea, Genus Theromyzon, which is known to live in the nasal cavities of certain water birds and feed on their blood. The incorrect answers represent organisms from different phyla and classes that are not associated with living in the nasal cavities of water birds as blood suckers.

9. Identify the different parts of earthworm anatomy: setae, prostomium, mouth, clitellum, internal septa, pharynx, esophagus, crop, gizzard, intestine, anus, dorsal blood vessel, 'hearts', seminal receptacles, and seminal vesicles.

Text

Diagram

Video

Image

The question requires visual identification of various parts of earthworm anatomy, making 'Image' the correct answer. The incorrect answers of 'Text', 'Diagram', and 'Video' do not fulfill the visual identification aspect of the question, rendering them incorrect.

Explanation

The question requires visual identification of various parts of earthworm anatomy, making 'Image' the correct answer. The incorrect answers of 'Text', 'Diagram', and 'Video' do not fulfill the visual identification aspect of the question, rendering them incorrect.

10. What is the identification of this organism?

Phylum: Nematoda, Common name: Roundworms

Phylum: Arthropoda, Common name: Ants

Phylum: TardigradaCommon name: Water bearsInteresting fact: can survive up to 10 days in vacuum of space while dormant.

Phylum: Mollusca, Common name: Snails

The correct identification of the organism described is Phylum: Tardigrada, Common name: Water bears. They are known for their ability to survive extreme conditions, such as the vacuum of space, for up to 10 days while in a dormant state.

Explanation

The correct identification of the organism described is Phylum: Tardigrada, Common name: Water bears. They are known for their ability to survive extreme conditions, such as the vacuum of space, for up to 10 days while in a dormant state.

11. What is the phylum of Ectoprocta known for?

Phylum: Chordata (possess a notochord)

Phylum: Arthropoda (jointed-legged animals)

Phylum: Ectoprocta (outside anus)

Phylum: Mollusca (soft-bodied animals)

Ectoprocta, also known as Bryozoa, are aquatic colonial animals that are characterized by their location outside the anus. This phylum is distinct from Mollusca, Chordata, and Arthropoda due to this specific identifying feature.

Explanation

Ectoprocta, also known as Bryozoa, are aquatic colonial animals that are characterized by their location outside the anus. This phylum is distinct from Mollusca, Chordata, and Arthropoda due to this specific identifying feature.