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Flashcards in Unit 4 Deck (144)
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1

This group of organisms are parasitic on Arthropods but develop into free living adults that do not feed.

Nematomorpha

2

Group of nematomorpha that is parasitic to terrestrial arthropods.

Gordiids

3

Group of nematomorpha that are parasites on marine crustaceans

Nectonematids

4

What three systems are lost in Phylum Nematomorpha

Excretory, circulatory and respiratory

5

Do members of phylum Nematomorpha express cephalization

No, they have no distinct head

6

How do members of Nematomorpha reproduce

They are dioecious meaning they reproduce sexually

7

Are members of Phylum Nematomorpha acoelomates, pseudocoelomates or eucoelomates

Pseudocoelomates- they do not have a true body cavity

8

Rotifers are _________ meaning that all adults possess the same number of cells.

Eutelic

9

Are Rotifers acoelomates, pseudocoelomates or eucoelomates

Pseudocoelomates

10

Some Rotifers produce a shielding plate structure called a ___________

Lorica

11

In the Phylum Rotifer _____________ is practiced; meaning in some instances an underutilized egg can develop into a new individual.

Parthenogenesis

12

Are Rotifers generally monoecious or dioecious

Dioecious but they are able to reproduce both sexually and asexually

13

What type of epidermis is located under the cuticle of a Rotifer

Syncytial (multinucleate) epidermis

14

Rotifers exhibit cryptobiosis, what does this mean?

It is an ametabolic state that they can enter into during harsh environmental conditions. During this state all metabolic process stop, preventing reproduction, development and repair. Once the environment reaches a stable state the organism will rehydrate and resume its metabolic processes.

15

This distinctive feature on a Rotifer is used for feeding and located near the mouth

Ciliated tufts

16

This distinctive feature of a Rotifer is like a pharynx structure

Mastax

17

This distinctive feature on a Rotifer is located in the neck , it is the first step in digestion and grinds the food up.

Trophi (jaw like)

18

This distinctive feature of a Rotifer is used for attachment

Toes

19

The digestive tract in a Rotifer is mouth to anus meaning what?

It is a complete digestive tract

20

Arthropods exhibit ___________ because they have functional clusters called ___________

Metamerism, tagmata

21

What type of circulatory system can be found in Arthropods

Open circulatory system

22

What are some features that Arthropods have

Ecdysis- molting Metamorphosis Paired jointed appendages Chitinous exoskeleton Tagmata

23

What are the the 4 subphyla of Arthropoda

Subphylum Chelicerata Subphylum Crustacea Subphylum Myriapoda subphylum Hexapoda

24

What types of antennae do hexapods have

Olfactory - smell Auditory - sound Tactile - touch

25

Multiple compound eyes found in Subphylum Hexapoda

Ommatidium

26

What is the first tagmata in a hexapod and what structures are found there

Head - salivary glands, pharynx, esophagus, pair of antennea, mouth parts, ommatidium (eyes)

27

What is the second tagmata in a hexapod

Thorax that is devided into prothorax, mesothorax, and metathorax

28

Where can the wings be found on a hexapod

One pair of wings can be found on the mesothorax and another pair of wings can be found on the metathorax.

29

Besides wings, what other structures are located in/on the thorax of a hexapod

Crop, gizzard, gastric caecae, trachea/tracheoles, spiracles, ventral nerve chord (through the entire length)

30

What is the function of the gastric caecae in a hexapod

They produce digestive enzymes