Chapter 27 Bio 110
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12 terms
Terms | Definitions |
|---|---|
 Vascular Tissue | Plants divided into groups based on presence of vascular tissue and seed type. • 4 major groups: • Non-vascular plants • Seedless vascular plants • Gymnosperms • Angiosperms, Plant tissue consisting of cells joined into tubes that transport water and nutrients throughout the plant body. |
| Growth | An increase in number, size, and volume of cells (quantitative) |
| Development | A series of stages in which specialized tissues, organs and organ systems form in heritable patterns (qualitative) |
| (homeostasis) | Detecting and responding to changes is a characteristic trait of all living things and the key to homeostasis |
| Chordates | Vertebraes: have a notochord which supports their bodies • Cephalochordates, Urochordates, Jawed Fishes, Bony Fishes, Amphibians, Reptiles, Birds, Mammals |
| Invertebrates | are the largest group of animals • Sponges, Cnidarians, Flatworms, Segmented Worms, Mollusks, Cephalopods, Rotifers, Roundworms, Arthropods |
| Negative feedback mechanisms | A change leads to a response that reverses that change • Example: A furnace turns off and on to maintain a set temperature; similar mechanisms maintain human body temperature |
| Positive feedback mechanisms | A chain of events intensifies the change from the original condition, leading to a change that ends feedback • Example: Childbirth contractions |
| Chordates Examples | Jawed fish and Birds |
| Invertebrates Examples | Roundworms and Sponges |
| homeostasis in animals | Receptor- such as a free nerve ending in the skin. Integrator- Brain and spinal cord. Effector- a muscle or gland. |
| homeostasis in plants | Mechanisms that control homeostasis in plants are not centrally controlled • Systemic acquired resistance: Affected cells release signaling molecules that cause release of protective organic compounds • Compartmentalization walls injured and infected tissues with resins and toxic compounds |
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