Unit 2 Flashcards

1
Q

What is the reproductive patterns of phylum Platyhelminthes?

A

-Most species are monoecious
-highly regenerative
-Asexual reproduction through fragmentation
-Sexual reproduction, internal fertilization via “penis fencing”

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2
Q

What is the body plan of Nemertea?

A

Bilateral

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3
Q

What are the tissues of the phylum Nemertea?

A

Triploblastic, acoelomate

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4
Q

What is the digestive system of Nemertea?

A

Protostome, complete digestive

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5
Q

What is the defining character of the Nemertea?

A

Eversible proboscis
-harpoons prey
-located in structure called rhynchocoel
-some have barbs

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6
Q

How do Nemertea move and eat?

A

Simple cephalization, most are carnivorous

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7
Q

What os the reproductive patterns of the phylum Nemertea?

A

-Highly regenerative
-Asexual via fragmentation
-Mostly Dioecious
Have gonads along the digestive tract
-typically exhibit courtship spawning
-external fertilization
-larvae, growth through several larval stages

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8
Q

What is the body plan of phylum Nematoda?

A

Bilateral

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9
Q

What are the tissues that Nematoda exhibits?

A

Triploblastic , Pseudocelomate

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10
Q

What is the digestive system of Nematoda?

A

Protosome, complete digestive

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11
Q

What is the common factor of superphylum Ecdysozoa?

A

-All species have cuticle as exoskeleton, all molt to grow
-Nematodes cuticle is made of collagen and chitin

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12
Q

How do they move?

A

Simple cephalization, mostly parasitic so don’t need much movement

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13
Q

Which two body systems are not in phylum Nematoda?

A

No Circulatory System, No Respiratory system

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14
Q

What two body systems are included in phylum Nematoda?

A

Excretory system, Nervous system

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15
Q

What is the reproduction patterns of phylum Nematoda?

A

Reproduction is species specific:
-monoecious
-dioecious
-parthenogenic
In dioecious species, fertilization is internal

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16
Q

What is the placement of the nerves in phylum Nematoda?

A

Dorsal nerve and Ventral nerve

17
Q

What is the body plan of phylum Tardigrada?

A

Bilateral

18
Q

What is the digestive system of Tardigrada?

A

Protostome, Complete digestive system,
- mouth with saliva *

19
Q

What tissues are presented by phylum Tardigrada?

A

Triploblastic, coelomate

20
Q

In superphylum Ecdysozoa, what is the cuticle of a Tardigrade made of?

A

Chitin that is divided into plates

21
Q

What is a unique defining characteristic of phylum Tardigrada?

A

Ability to suspend metabolism, cryptobiosis

22
Q

What is the morphology of Tardigrada?

A

-Cylindrical body with four pairs of legs
-pair of eye spots for sensing light
-sensory papillae & bristles provide sense of touch
- very small, less than 1mm

23
Q

What two body systems are not in phylum Tardigrada?

A

No Circulatory system, No Respiratory

24
Q

What are the two body systems that are in phylum Tardigrada?

A

Excretory system is malpighian tubules, Nervous system

25
Q
A