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Alana T.

Created: 2011-04-27
Last Modified: 2011-07-08

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Campbell Biology: Concepts & Connections with MasteringBiology� (7th Edition)

What 4 features do Chordates have?

1) Dorsal

2)hollow nerve cord

3) stiff notochord

4) pharyngeal

5) muscular post anal tail

The simplest chordates are...

tunichates, lancelets

Amniotes means...

they have eggs in a fluid-filled sac

Lampreys are...

vertebrates that lack hinged jaws and paired fins

TMJ stands for

temporo mandibulara joint

Jawed vertebrates with gills and paired fins include

sharks, ray finned fishes, and lobe finned fishes

Sharks can also be called

chondrichthyans

Sharks dont have a...

swim bladder (a device inside a fish where they can put gas in it to float)

ray finned fishes have..

a skeleton reinforced with a hard matrix of calcium phosphate, they also have an operculun that moves water over they gills and a swim bladder

finned fishes have...

muscular fins supported by bones

Amphibians were the first

tetrapods

tetrapod

vertebrates with 2 pairs of limbs

reptiles

amniotes, they are tetrapods with a terrestrially adapted egg

ectothermic means:

cold blooded, absorb body heat from environment

Dinosaurs are considered reptiles that were...

endthermic (they produced their own body heat)

Birds

feathered reptiles with adaptations, endothermic

what were the early functions of feathers prior to flight usage?

courtship display

insulation of organism

other adaptations that birds have that allow flight

reduced weight, high metabolic rate, acute senses, powerful muscles, excellent circulation

Mammals are...

endothermic amniotes with hair, which insulates their bodies, and mammary glands, which produce milk

what are the three mammalian groups?

monotremes, marsupials, euthenans

Platypus and echidnas are...

monotremes and they lay eggs

Marsupial offspring complete development...

attatched to mother's nipple, usually inside a pouch

placenta

a temporary organ present only during pregnancy that is part of the fetus and part of the mother

eutherians

placental mammals, complete development before birth

ecology

the scientific study of the interactions of organisms with their environments

biosphere

total of all of Earth's ecosystems

the biosphere is a ___ system

closed (except for heat loss and sunlight)

abiotic factor

anything that affects the biosphere that isnt living

predation

biological interaction where predator feeds on prey

competition

rivalry between individuals or groups for territory or resources

5 primary biomes

aquatic, forrest, deserts, grasslands, tundra

climate

average and variations of weather in a region over a long period of time

biome

ecosystem largely determined by climate usually classified according to vegetation and characterized by organisms adapted to a particular climate

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Biology 1543 with Roberts at University of Arkansas - Fayetteville †

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