Kolej Matrikulasi Kedah Biology Inveterbrates

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  • Topic: Arthropod, Annelid, Phylum
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  • Published : March 18, 2013
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Kedah Matriculaion College|
I N V E R T E B R A T E S
|
Biology Folio|

By: Siti Nur E’zzati Zaidi & Nur Aida Amira (S3K2P6[B]) [Pick the date]
|

Practical Class Lecturer: Pn Suria
Tutorial Class Lecturer: Miss Lock Shu Ping

Table of contents

Phylum Porifera…………………………………………………..3 Phylum Coelentrata…………………………………………….4 Phylum Platyhelminthes……………………………………..5 Phylum Nematoda………………………………………………6 Phylum Annelida………………………………………………….7 Phylum Mollusca…………………………………………………..8 Phylum Arthropoda…………………………………………….9

Class Crustacea……………………………………………..9
Class Chilopoda…………………………………………….10
Class Diplopoda…………………………………………….11
Class Insecta…………………………………………………..12
Class Arachnida…………………………………………….13
Class Merostomata……………………………………….14 Phylum Echinodermata………………………………………15

Phylum Porifera
Unique characteristic of Porifera
I- Cellular level of organization
II- Mostly marine, some in fresh water
III- Body plan has no definite symmetry
IV- Simplest type of metazoan organization
V- Reproduce sexually by budding and fragmentation; sexually by egg and sperm VI- Mostly monoecious

Example: Leucosolenia (Sponges)

Unique characteristic of sponges:
I- In the mesophyl are the spicule(sharp, calcium carbonate or silica structures) which form the skeletal fibres of many sponges

Phylum Coelentrata/Cnidaria
Unique characteristic of Coelentrata/Cnidaria:
I- Mostly marine except few freshwater forms
II- Radial symmetrical, true tissues but lack organs
III- Simple nerve net in body wall
IV- Sexual and asexual reproduction
V- Life cycle including separate polyp and medusa stages sessile(adult), free floating medusa VI- Exhibit the phenomenon of polymorphism
VII- Carnivorous
Example: Obelia sp. (Hydra)
Class: Hydrozoa

Unique characteristic for Hydrozoa:
I- Alternate polyp and medusa forms in the life cycle although the polyp is the dominant stage II- No mesenteries

Phylum Platyhelminthes
Unique Characteristic of Platyhelminthes:
I- Bilaterally symmetrical acoelomates
II- Free-living forms exhibit cephalization
III- Hermaphroditic(monoecious), possessing both male and female sex organs IV- Unsegmented
V- Body dorsel-ventrally flattened
VI- Presence of flame cells
VII- Digestive system with single opening(has mouth but no anus)

Example: Dugesia sp. (Planarian)
Class: Turbellaria

Unique characteristic for Turbellaria
I- Free-living
II- A coelom is not present
III- Excretory system consists of network of branching tubes.

Phylum Nematoda
Unique characteristic of Nematoda:
I- Triploblastic
II- Bilaterally symmetrical
III- Pseudocoelmate
IV- Unsegmented
V- Narrow body pointed at both ends
VI- Locomotion by contraction of longitudinal muscle fibres VII- Has a mouth and an anus
VIII- Male and female gametes are produces by separate sexes, reproduction always sexual.

Example: Ascaris lumbricoides (roundworm)

Phylum Annelida
Unique characteristic of Annelida:
I- Metameric segmented
II- Body covered by chaetae and non chitinous cuticle
III- Nerve system consist of dorsal cerebral ganglion connected to a ventral nerve cord IV- Locomotion by contraction of circular and longitudinal muscles V- Presence of nepridia for urea excretion

Example: Pheretima (earthworm)
Class: Oligochaeta

Unique characteristic of earthworm:
I- Body with conspicuous segmentation
II- Number of segments variable
III- Coelom spacious and usually divided by intersehmental septa IV- Hermaphroditic

Phylum Mollusca
Unique Characteristic of Mollusca:
I- Metameric usegmented
II- Definite head and foot modified for locomotion
III- Mantle cavity modified into gills or a lung
IV- Open circulatory system
V- Gaseous exchange by gills, lungs, mantle or body surface VI- Metanephridia gather wastes from coelom and discharge to mantle...
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