BIOL 2030 Study Guide - Final Guide: Gastrovascular Cavity, Shear Zone, Bivalvia

139 views26 pages
17 Apr 2012
Department
Course
Professor

For unlimited access to Study Guides, a Grade+ subscription is required.

Lab 1: Kingdom Protista
Taxanomic characteristics
Protista kindgdom is paraphyletic (A group of taxa is said to be paraphyletic if the group contains its last
common ancestor but does not contain all the descendants of that ancestor)
Protists are heterotrophic and motile
all life process is within the single cell
digestion takes place in food vacuole
water regulation is through contractile vacuole
reproduction is though binary fission
classified through locomotion (cilia, flagella, amoeboid)
Euglena (Free living Protozoa)
Phylum: Euglenozoa
Subphylum: Euglendia; have chloroplasts with chlorophyll b
Class Euglenoidea: some are found to have a light-sensitive stigma or eyespot which allows light only from
one direction to strike a light sensitive receptor.
Order: Euglenales
Genus: Euglena
-Euglena is a plant-like flagellate and may contain chloroplast
-freshwater flagellate
-Spindle-shaped body that moves by means of a single anteriorly projected flagellum and a second very short
flagellum also has a function in locomotion
-worm like and expansion of the body is known as “euglenoid movement”
-stigma: found at the base of the flagellum, it’s a photoreceptive pigment or eyespot
-contractile vacuole(used for osmoregulation) found posterior to the reservoir (flagellum arises from a
clear pear-shaped area)
-Cytopharynx is used for ingestion of preys
-most obvious structure are the chloroplasts, the shape and arrangement of the chloroplasts are used to
determine the species of Euglena
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 26 pages and 3 million more documents.

Already have an account? Log in
Trypanosoma
Phylum: Euglenozoa
Subphylum Kinetoplasta: all parasitic in animals and plants; have a unique organelle the kinetoplast which
is part their mitochondrion and is composed of a large disk of DNA
Class Trypanosomatidea
Gensus: Trypanosoma
-all are parasitic in blood of man and vertebrates
-Typanosoma gambiense: agent of African sleeping sickness, transmitted by tsete flies.
-the undulating membrane is made of a row of cilia that form a sheet and beat in synchrony
Identify:
Nucleus
Undulating membrane
Flagellum
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 26 pages and 3 million more documents.

Already have an account? Log in
Plasmodium
Phylum Apicomplexa: all are endoparastites and hosts are found in many animals
Class: Coccide(infects both vertebrates and invertebrates)
Order: Eucoccidia
Genus: Plasmodium
-causes malaria
-involes two hosts, humans and anopheline mosquitoes
-infection occurs through the injection of Plasmodium sporozoites in the saliva of a mosquito into a human
capillary
-sporozoites are then carried in the blood to the liver and for cryptozoites
-after replication merozoites are relased and enter bloodstream
Paramecium
Phylum Ciliophora: possess cilia, two nuclei: macronucleus and micronucleus
Class: Oligohymenophorea
Order: Peniculida
Genus: Paramecium
-cytopharynx: at the base of which the food vacuoles form
-discharge of trichocysts: small bodies in the ectoplasm that expel a long thread-like structure when
simulated (defensive function)
Identify:
Peristome (oral groove)
Cytostome (mouth)
Cytopharynx
Food vacuoles
Contractile vacuoles
Cillia
Macronucleus
Unlock document

This preview shows pages 1-3 of the document.
Unlock all 26 pages and 3 million more documents.

Already have an account? Log in

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
1 Booster Class