Term
| Emergent property principle |
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Definition
| New properties emerge as organisms become more complex |
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Term
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Definition
| New classification system |
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Term
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Definition
| early cellular division of an embryo |
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Term
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Definition
| divide completely and evenly |
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Term
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Definition
| Twisting occurs during cell division |
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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
Germ layers
Ectoderm- Skin and nervous system
Mesoderm- everything else
Endoderm- Lining of digestive tract |
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Definition
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Term
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Definition
| First opening develops into mouth |
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Term
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Definition
| First opening develops into anus |
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Term
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Definition
| Problems with increasing size |
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Term
1) Folding the body surface to increase surface area
2) Flatten one dimension so surface area is similar to volume
3) Developed internal transport systems to transport |
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Definition
| Ways to deal with increase in size |
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Term
- Better buffer against environment
- Greater protection from predation
- More efficient use of metabolic energy |
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Definition
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Term
- Habitat
- Evolutionary history
- Way of life |
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Definition
| Diversity of animal body form constrained by |
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Term
1. Multicellularity
2. Symmetry (bilateral symmetry)
3. Body cavity
4. Segmentation (Metamerism)
5. External appendages
6. Nervous system |
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Definition
| Major evolutionary innovations in animal form |
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Term
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Definition
correspondence in size and shape on opposite sides of a center (or median)
plane |
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Term
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Definition
| Any plane passing through the center divides the body into equivalent halves |
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Term
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Definition
Divided into similar halves by more than two planes passing
through the longitudinal axis
a. Animals usually sessile, freely floating, or weakly swimming
b. Can interact with their environment in all directions → no front or back |
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Term
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Definition
Can be divided along a midline (or sagittal) plane into two
mirrored halves. Are all triploblastic. Part of Blateria. |
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Term
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Definition
Differentiation of a head
- allow you to interact with environment more quickly. Allows for formation of a central nervous system. |
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Term
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Definition
| a fluid-filled space surrounding the gut. Provides a tube-within-a-tube arrangement |
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Term
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Definition
| Most do not have a true coelom or body cavity. Flatworms. Move via cilia |
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Term
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Definition
| Cavity surrounding gut but not composed of mesodermal peritoneum. Single layer of mesodermal tissue lining the inside of the ectoderm. |
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Term
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Definition
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Term
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Definition
| Possess a true coelom. mesodermal peritoneum- holds the organs in place |
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Term
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Definition
| cells split off from ectoderm and endoderm and forming |
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Term
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Definition
| Outpocketing from center part or denteron. |
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Term
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Definition
| Serial repetition of similar body segments along the longitudinal axis of the body. Annelida, Arthropoda, Chordata |
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Term
| Enhance an animal’s ability to move, greater muscle development and nervous system. Modified specialized limbs better controlled, more rapid movement |
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Definition
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