Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
39 Cards in this Set
- Front
- Back
|
How many species are there in Phylum Rotifera?
|
There are 1,800 Species.
|
|
|
What is the size range of Rotifers?
|
Mostly, Rotifers are microscopic but the largest one is 2mm in size.
|
|
|
How is reproduction in rotifers?
|
They use parthenogenesis where females produce females from unfertilized eggs... but sometimes, when conditions are bad, they produce degenerate males who live long enough to fertilize the eggs.
|
|
|
Rotifers are ______ cellular
|
Multicellular.
|
|
|
How do rotifers eat?
|
They have cilia around their mouth which brings in water & food --> jaw (mastax)
|
|
|
What is a mastax?
|
A grinding organ for rotifers.
|
|
|
What kind of feeders are rotifers?
|
They are suspension feeders & raptorial (predatory)
|
|
|
What is the arrangement of body parts for Mollusks?
|
A ventral MUSCULAR FOOR
a dorsal MANTLE In between -- Visceral Mass |
|
|
What does the visceral mass contain?
|
It contains the internal organs
|
|
|
Do all mollusks have shells?
|
No. Most do have one thats derived from the mantle but some have a lost shell, such as the octopus.
|
|
|
What are the 5 classes of Mollusks?
|
Scaphopods
Polyplacophora Gastropoda Bivalvia Cephalopoda |
|
|
What is torision in Gastropods?
|
It is when the visceral mass is folded by 180 degrees. (Snails)
|
|
|
How many shells do chiton (polyplacophora) have?
|
They have 7-8 shells.
|
|
|
How can a squid and octopus move?
|
They can move by jet propulsion
|
|
|
what class do squids and octopus belong to?
|
Cephalopoda
|
|
|
What is a nautilus?
|
|
|
|
How many known species of phylum arthropoda are there?
|
900,00
|
|
|
What are the major characteristics of an arthropod?
|
Exoskeleton
Jointed Appendages Open circulatory system |
|
|
What is the exoskeleton of an arthropod made of?
|
It is made up of chitin and sometimes called a CUTICLE
|
|
|
Why do arthropods needs to molt?
|
They need to molt because the exoskeleton grows and b/c its a hard shell.
|
|
|
The exoskeleton in arthropods helps prevent ______ loss.
|
Water loss.
|
|
|
What are the four major SUBPHYLA for arthropods?
|
Trilobites (extinct)
Chelicerates Crustaceans Uniramians |
|
|
What is incomplete metamorphosis?
|
A slight change where the young resemble the adults
Ex: Grasshoppers. |
|
|
What is complete metamorphosis?
|
A change where the young look totally different from the adults.
Ex: Caterpillar to butterfly |
|
|
What are the stages of complete metamorphosis?
|
Egg --> Larvae --> Pupae --> Adult
|
|
|
When were Trilobites common?
|
They were common during the Cambrian to the Paleozoic.
|
|
|
What kind of eyes did trilobites have?
|
They had compound eyes.
|
|
|
Trilobites had ______ ______ body parts.
|
They had three longitudinal body parts.
|
|
|
What subphyla do spiders, ticks and scorpians belong do?
|
Spiders, ticks, and scorpions belong to the Chelicerate subphyla.
(lack antennae) |
|
|
Modified, first set of claw like apendages are known as :
|
Chelicerae
|
|
|
What are the two main groups of Chelicerae?
|
Horseshoe crabs (aquatic scavengers)
Arachnids (carnivirious or parasitic) |
|
|
Crustaceans have _____ pairs of antennae.
|
Two!
|
|
|
Crabs, lobsters, isopods, barnaclesm decapos, water fleas, shrimp belong to which subphyla?
|
Crustaceans
|
|
|
What does biramous appendages mean?
|
This means that appendages are branched -- have two branches.
Crustaceans. |
|
|
What phyla are included in the Kingdom LOPHOPHRATES?
|
Phylum Bryozoa and Phylum Brachipoda
|
|
|
How many species are in phylum bryozoa?
|
About 5,000 species
|
|
|
How many species are in phylum Brachipoda?
|
330 living, 30,00 fossil
|
|
|
What are the characteristics of Phylum Bryozoa?
|
They are colonial animals that have a hard exoskeleton. They are aquatic and sessile; some are important reef builders.
|
|
|
What are the characteristics of Phylum Brachiopoda?
|
They resemble clams & bivalvia (mollusks)
THey have DORSAL and VENTRAL shells that DIFFER in size. They are NOT related to Bivalves. They are FILTER FEEDERS and sessile. |
