Test for Module 13 Flashcards
clitellum
Which phylum of animals discussed in this module has nematocysts
Cnidaria
mantle
a sheath of tissue that encloses the vital organs of a mollusk, makes the mollusk’s shell, and performs respiration
What is the difference between an open circulatory system and a closed circulatory system?
In an open circulatory system the blood is pumped into chambers where it comes in direct contact with tissues and organs. In a closed circulatory system, the blood stays in vessels.
What phylum does a flatworm belong to?
platyhelminthes
hermaphroditic
possessing both the male and the female reproductive organs
What phylum does a jellyfish belong to?
cnidaria
What phylum does a snail belong to?
mollusca
oviduct
nematocysts
small capsules that contain a toxin which is injected into prey or predators
What phylum does a segmented sea worm belong to?
annelida
vertebrates
animals that possess a backbone
What does the term cephalization mean?
the concentration of nerves and sensory organs in the anterior or “head” end of an organism
posterior end
the end of an animal that contain its tail
When an earthworm mates, its seminal vesicles are ___ and its seminal receptacles get ___.
emptied; filled
invertebrates
animals that have a backbone
What is the common mode of asexual reproduction among the organisms of phylum cnidaria?
budding
ganglia
dorsal blood vessel
What function does the cuticle perform in an earth worm?
it allows the earthworm to get oxygen and release carbon dioxide
an organism with two shells
bivalve
What is the difference between a gastrovascular cavity and a complete digestive tract?
A gastrovascular cavity or digestive sac has only one opening for food to enter and wastes to exit. A complete digestive tract is a one-way tube with two openings - a mouth at one end where food enters, and anus at the other end where wastes exit.
What phylum does sponge belong to?
porifera
What do sponges eat and how do they get their food?
the algae, bacteria, and organic matter that is in the water
What is the common mode of asexual reproduction among the organisms of phylum platyhelminthes?
regeneration
What is the difference between a hard, prickly sponge, and a soft sponge?
hard, prickly sponges contain spicules while soft sponges contain spongin
Parasites can have ___ because they need not search for food.
simple nervous system
esophagus
ventral nerve cord
seminal vesicle
an organism with a single shell
univalve
