Moodle - BIO 106 Lab - Chapter 8 and 9
TRUE
Cnidarians have two germ layers, and are at the tissue level of development. TRUE/FALSE
ostia; osculum
Water flow is an important aspect of any sponge's life. The water flows in through the ____________, and out through the ____________.
FALSE
A nematode is a segmented worm. TRUE/FALSE
FALSE
All members of phylum Nematoda are parasitic and require a host to survive. TRUE/FALSE
FALSE
Earthworms (Lumbricus terrestris) are hermaphroditic. They never mate with another individual. TRUE/FALSE
FALSE
Earthworms have two hearts. TRUE/FALSE
Molting
In nematodes, ecdysis means or is interpreted as
Hirudin
Leeches use an anticoagulate called _________________ to prevent its host's blood from clotting.
Tissue
Sponges (Porifera) are said to have which level of organization?
Cnidocytes
The organism above contains stinging cells that allows it to catch prey and that also give the phylum its name. What are these cells called?
Memorize this
Underside of the worm
Radial
What Symmetry is this?
An oligochaete lacks parapodia
What is the difference between a polychaete and an oligochaete?
Cnidocyte
What is this unique stinging cell called that is possessed by Cnidarians?
Acoelom
What is this?
Coelom
What is this?
Pseudocoelom
What is this?
that the neurophysiology those drugs affect has been conserved since the common ancestor of protostomes and deuterostomes
What would it mean if C. elegans has a similar neurophysiological response to nicotine and alcohol as humans do?
Trematoda
Which of these taxa is characteristically (almost entirely) parasitic?
Mantle, head, visceral mass, muscular foot
Choose the main parts uniting the various groups of mollusks (like synapomorphies for the phylum, like to'ally).
TURE
Mesoderm occurs in flatworms but not in cnidarians or sponges. The mesoderm eventually becomes part of the functional unit of rudimentary organs. TRUE/FALSE
FALSE
The body plan of cnidarians is composed of two cell layers, the epidermis (from ectoderm) and the gastrodermis (from endoderm). Therefore, these simple animals are triploblastic and have well developed organ systems. TRUE/FALSE
Polychaeta
This organism is a segmented worm; to which class does it belong?
What does cephalization mean?
the development of sense organs and nervous system control at the body's leading head.
