Term
| Changes in Ecological niches |
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Definition
| the total sum of a species’ use of abiotic and biotic resources (“the space” occupied by a species in its environment) |
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Definition
| creates genetic variation |
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Term
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Definition
| differential survival and reproduction (not all members of a group survive to reproduce |
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Term
| What characteristics do all animals share? |
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Definition
Animals are multicellular, heterotrophic eukaryotes with tissues that develop from embryonic layers
Characteristics shared by animals:
1.Nutritional Mode
2.Cell structure & Specialization
3.Reproduction & Development |
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Term
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Definition
| Animals are heterotrophsthat ingest their food |
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Term
| 2. Cell Structure and Specialization |
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Definition
Multicellular eukaryotes
Cells lack cell walls
Bodies are held together by structural proteins such as collagen
Nervous tissue and muscle tissue are unique to animals |
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Term
| 3. Reproduction and Development |
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Definition
A. Most reproduce sexually
B. Diploid stage usually dominates life cycle |
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Term
Sperm fertilizes an egg, to form the zygote
Zygote undergoes |
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Definition
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Term
| Cleavage leads to formation of a |
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Definition
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Term
| The blastula undergoes _________, forming a _____ with different layers of embryonic tissues |
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Definition
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Term
| Gastrulation forms the ______ |
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Definition
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Term
| archenteron opens to the outside via the _______ |
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Definition
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Term
| The ______ of the archenteron develops into tissue lining the digestive tract |
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Definition
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Term
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Definition
sexually immature
morphologically distinct from the adult; it eventually undergoes metamorphosis |
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Term
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Definition
Only found in animals
Highly conserved gene family
Produces wide diversity of animal morphology
Examples:
Sponges
Insects |
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Term
| How do we categorize the great diversity of animals? |
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Definition
Variation in Body plans
e.g., Molecular control of gastrulation –unchanged for more than 500 million years (shared developmental trait) |
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Term
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Definition
| a group whose members share key biological features, not necessarily a clade, or monophyletic group |
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Term
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Definition
Asymmetric
Radial
Bilateral |
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Term
| Characteristics of bilaterally symmetrical animals |
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Definition
A dorsal(top) side and a ventral(bottom) side
A right and left side
Anterior(head) and posterior(tail) ends
Cephalization, the development of a head |
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Term
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Definition
| Collections of specialized cells isolated from other tissues by membranous layers |
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Definition
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Term
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Definition
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Term
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Definition
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Term
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Definition
| ectoderm, endoderm & mesoderm |
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Term
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Definition
| coelom-true body cavity derived from mesoderm |
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Term
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Definition
| pseudocoelom–derived from mesoderm and endoderm |
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Term
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Definition
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Term
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Definition
| Blastopore becomes the mouth |
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Term
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Definition
| Blastopore becomes the anus |
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Term
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Definition
| rigid programming of cell developmental fate in early stages of cleavage |
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Term
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Definition
| cells in the early stages of cleavage retains the capacity to develop into a complete embryo |
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Term
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Definition
(shared derived characters)
morphological and/or developmental traits
genetic traits |
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Term
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Definition
| Morphological & Developmental Support |
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Term
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Definition
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Term
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Definition
| clade of animals (eumetazoans) with true tissues |
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Term
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Definition
| Most animal phyla belong to the cladeBilateria |
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Term
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Definition
| shed their exoskeletons through a process called ecdysis |
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Term
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Definition
| have a feeding structure called a lophophore |
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Term
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Definition
| a distinct developmental stage |
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