| A | B |
|---|
| vertebrates | animal with backbone |
| invertebrates | animal without backbone |
| bilateral symmetry | describes animals that have body parts arranged in the same way on both sides of their body |
| radial symmetry | Describes animals that have body parts arranged in a circle around a central point similar to a bicycle wheel |
| setae | in a segmented worm, bristle like structures on the outside of the body that help it grip soil and move |
| crop | in an earthworm, a sac inthe digestive system that sores soil eaten by the worm |
| gizzard | in an earthworm, a muscular structure in the digestive system that grinds up soil |
| exoskeleton | on an arthropod, the hard lightweight external covering that sheilds, supports, and prtects their bodies |
| cold blooded | describes an animal whose body temp. varies with the temp. of its surroundings |
| warm blooded | describes an animal whose body temps. stays the same, regardless of temp. changes in its environment |
| predator | an organism that kills and eats prey to obtain energy |
| prey | an organism that is eaten by a predet |
| scales | hard,thin, overlapping plates that cover and protects a fish's body |
| amphibians | a cold blooded vertebrate whose permeable skin, strong skeleton and hibernation or estivation abilities adapt it to water and on land |
| hibernation | an adaption for winter survival during which an animal becomes inactive and all body processes slow down |
| reptile | a cold blooded vertebrate that has dry, scaley skin and lays eggs covered with a leathery shell |
| amntiote egg | a type of egg that provides a complete environment for the developing embryo |
| mammary glands | glands in female mammals that produce milk for feeding young |
| mammals | a warm blooded vertebrate with insulating ar and mammary glands |
| instinct | a complex pattern of innate behavior involving multiple actions |
| behavior | the way n organism acts toward its environment |
| learning | the processof developing a behavior through experience---- trial and error |
| placental | a mammal whose young develop inside the female in a uterus |
| marsupial | a mammal with a pouch on its abdomen for carrying and nursing its young |
| monotremes | a mammal that lays eggs having a tough leathery shell |
