Chapter 24 Flashcards
_____ is a rod of stiff but flexible connective tissue that runs the length of the body in chordate larvae or embryos, and supports it.
Notochord
_____ are chordates with a brain case of cartilage or bone. Most are vertebrates.
Craniates
_____ is an animal with a backbone.
Vertebrate
_____ are vertebrate with four legs, or a descendant there of.
Tetrapod
_____ is a vertebrate in which the embryo develops, surrounded by fluid enclosed, by membranes inside the egg.
Amniote
_____ are jawless fish with a cranium (skull case) but no backbone.
Hagfish
_____ are jawless vertebrates with a backbone of cartilage. Some are parasites of other fish.
Lamprey
_____ are fish with a skeleton of cartilage. Gills are visible at the surface. They include sharks and rays.
Cartilaginous fishes
_____ are the most diverse, including salmon, sardines, bass, swordfish, trout, tuna, halibut, carp, and cod. These are fish with fins supported by thin rays derived from skin; member of most diverse lineages of fishes.
Ray-finned fishes
_____ include coelacanths and lung fishes. It is a fish with fleshy fins that contain bones.
Lobe Finned Fishes
_____ are the first tetrapods who branched off from the lobe-finned fishes. They typically live in water then later live on land as a carnivore with lungs.
Amphibian
Where do amphibians spend most of their time?
Most spend some time on land, but return to water to reproduce.
_____ is an egg with internal membranes that allow the amniote embryo to develop away from water.
Amniote egg
_____ is an amniote subgroup that includes lizards, snakes, turtles, crocodiles and birds.
Reptiles
_____ is an animal that controls its internal temperature by altering its behavior; for example, a lizard.
Ectotherms
_____ is an animal that generates heat by its metabolism; for example, a bird or a mammal.
Endotherm
_____ are descendants of feathered dinosaurs and is an animal with feathers.
Birds
_____ are diversified after dinosaurs were gone. They are an animal with hair or fur; females secrete milk from their mammary glands.
Mammals
_____ are egg laying mammals.
Monotremes
_____ are mammals in which young are born at an early stage and complete development in a pouch on the mothers surface.
Marsupials
_____ are mammals in which a mother and her embryo exchange materials by means of an organ called the placenta.
Placental mammals
_____ is a mammal having grasping hands with nails. They include humans, prosimians, monkeys, and apes.
Primates
_____ are the most recent mammalian lineage. They include apes, humans or extinct human like species.
Hominids
What are the 5 key trends in primate evolution?
- Structures of the face have changed
- Teeth and jaws were modified for mixed diets
- Bipedalism (upright standing and walking on two feet)
- Hands developed to increase dexterity
- Braincase and brain increased in size and complexity
