Term
|
Definition
Animals obtain energy by injesting other organisms multicellular, no cell walls, diverse in form 99% invertebrates, 42,500 vertebrates reproduce sexually and have special type of haploid gamete
|
|
|
Term
|
Definition
| the diploid cell that results from the fusion of male and female gametes (fertilization) |
|
|
Term
|
Definition
| mitotic divisions that zygote undergoes |
|
|
Term
|
Definition
| solid ball of cells that results after cleavage |
|
|
Term
|
Definition
| hollow ball of cells after morula forms |
|
|
Term
|
Definition
| forms when blastula folds inward at one point to form hollow sac with opening at one end (called blastopore). An embryo at this stage is called a gastrula |
|
|
Term
|
Definition
| collections of cells that have joined together and are specialized to perform a specific function |
|
|
Term
|
Definition
"sponges" simplest animals that lack defined tissues and organs but their cells can differentiate over and over again, while most cell types differentiation is irreversible process |
|
|
Term
|
Definition
| multicellular animal, 36 distinct phyla of metazoa |
|
|
Term
|
Definition
| radial symmetry, body design where parats of body arranged around central axis so that any plane passing through central axis divide organism into mirror image halves |
|
|
Term
|
Definition
| bilateral symmetry body design where body has top (dorsal) and bottom (ventral), left and right symmetry, and front (anterior) , back (posterior) ends |
|
|
Term
|
Definition
| phylum of bilaterally symmetrical animals |
|
|
Term
|
Definition
| evolution of a definite brain area and head, in bilaterally symmetrical animals |
|
|
Term
|
Definition
one of body plans for bilateral symmetric animals no body cavity between mesoderm and endoderm, space is filled with cells and organic material
|
|
|
Term
|
Definition
|
|
Term
|
Definition
one of body plans for bilateral symmetric animals called "pseudo" because it is not lined with epithelial tissue has body cavity between mesoderm and endoderm space
|
|
|
Term
3 Germ Layers Endoderm Mesoderm Ectoderm |
|
Definition
Endoderm- inner germ layer that gives rise to epithelium that lines inside of digestive and respiratory tracts Mesoderm- middle germ layer that gives rise to muscle, bone, circulatory, excretory, and reproductive systems Ectoderm- outer germ layer that gives rise to outer epithelium (hair, skin, nails) and nerve tissue including sense organs, brain, spinal cord.
|
|
|
Term
|
Definition
subdivision of body into segments. Has 2 advantages from early development segments can be redundant systems or repeated so that damage to any one segment is not fatal because other segments duplicate purpose locomotion is more efficient when individual segments can move independently because animal as whole has more flexibility of movement
|
|
|
Term
Classifications: Polyphyletic Monophyletic Clade |
|
Definition
Polyphyletic- does not include most recent common ancestor Monophyletic- does include most recent common ancestor or group and all descendants Clade- a monophyletic group
|
|
|
Term
|
Definition
A multicellular heterotroph without cell walls. Cells do not divide by mitosis (haploid cells) Some undergo metamorphosis
|
|
|
Term
How are the major animal phyla (whom is relateed to whom?)classified? |
|
Definition
|
|
Term
| What is difference between Protosome and Deuterosome? |
|
Definition
|
|
