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;
51 Cards in this Set
- Front
- Back
Unfetilized eggs have a |
Viewable nucleus |
|
Fertilized eggs are called |
Zygotes |
|
Union of male and female nuclei |
Fertilization |
|
What happens once the egg is fertilized? |
Cleavage |
|
2 --> 4 --> 8 --> 16, until a _______ forms. |
Ball called a morula |
|
A hollow ball of cells |
Blastula |
|
Cell of a blastula |
Blastomere |
|
Opening on a blastula |
Blastopore |
|
Blastopores becomes . . . |
Mouth or anus |
|
As it grows larger, a portion of the blastula flattens out, forming . . . |
Gastula |
|
Following the formation of the gastula, ______ occurs |
Invagination |
|
First life was |
Prokaryotic and marine |
|
Unicellular organisms gave rise to |
Metazoans |
|
Most primitive metazoans are |
Cnidaria |
|
Cnidarians have |
Stinging cells |
|
Stinging cells are called |
Cnidoblasts |
|
Inside the cnidoblasts are |
Poisonous threads called neumatocysts |
|
Mouth and anus are |
The same opening |
|
Some cnidarians have |
Tentacles |
|
Cnidarians are |
Diploblastic and have no true muscle |
|
Some can move slightly due to a muscle-like mass called . . . |
Mesaglea |
|
Cnidarians have two body shapes |
Polyp and medusa |
|
Polyp shape is |
Cylindrical and vase-shaped |
|
Medusa shape is |
Cup-shaped |
|
Many cnidarians are . . . |
Monecious (hemaphroditic) |
|
Form structures in the oceans where you can find most of your plants and animals |
Coral |
|
Some coral have _______, which is also found in shells of mollusks |
Calcium carbonate |
|
Everyday term for calcium carbonate |
Lime |
|
Platyhelminthes and all remaining phyla have |
Bilateral symmetry |
|
Flatworms |
Flat and ribbon-like |
|
Flatworms have a . . . |
Specialized cuticle for protection |
|
The most primitive flatworms are . . . |
Triproblastic |
|
Flatworms have . . . |
No body cavity |
|
A body cavity is called a |
Caelom |
|
Flatworms are |
Acaelomic |
|
Tapeworm head end has a ring of hooks called a |
Solex |
|
The solex is used to |
Hold on to the lining of the intestines |
|
Largest part of the tapeworm's body are numerous segments called . . . |
Proglottid |
|
The proglottid is where |
Male and female eggs are fertilized |
|
How do tapeworm eggs get to a new host? |
Parts of the tapeworm with eggs break off, are ingested, and the eggs hatch into another tapeworm. |
|
Round worms |
Nematoda |
|
Round worms are |
Triproblastic, eucaelomic |
|
Some round worms are |
Parasitic, such as the local pinworms |
|
Mollusca |
Triproblastic, Bilateral symmetry, eucalom |
|
Many mollusks have . . . |
A shell |
|
There are three classes of mollusks: |
Bivalvia, Gastrodopa, cephalapoda |
|
Examples of bivalvia are: |
Mollusks with two shells, such as clams |
|
Examples of gastropoda are: |
Snails |
|
Examples of cephalapoda are" |
Squids and octopi |
|
The scheme of classification used today was developed by . . . |
Carl von Linne, a Swedish botanist who worked in the 18th century. |
|
A category is called a . . . |
Taxa (Taxon pl.) |