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119 Cards in this Set
- Front
- Back
What domain are vertebrates in? |
Eukaryota |
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Three characteristics of the kingdom animalia |
heterotrophic, multicellular, and lack cell walls |
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4 characteristics of chordata |
notochord, pharyngeal slits, dorsal hollow nerve cord, and post-anal tail
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3 subphyla of chordata |
urochordata, cephalochordata, and vertebrata |
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what does "urochordata" mean? |
tail chord |
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3 traits of urochordata |
marine filter-feeders, adult is sessile, and larva is mobile |
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common name of urochordata |
tunicate/sea squirt |
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what does"cephalochordata" mean? |
head chord |
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What is the common name of cephalochordata? |
amphioxus/lancelet |
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2 characteristics of cephalochordata |
marine filter feeders and semi-sessile |
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3 ways cephalochordates are similar to vertebrates |
closed cardiovascular system with muscular heart, similar muscular proteins, and similar organization of cranial nerves |
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2 differences between cephalochordates and vertebrates |
Cephalochordates have protonephridia the filters coelomic fluid, but vertebrates have nephrons that filter blood. Cephalochordates have alternate spinal nerves, but vertebrates have successive pairs |
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3 characteristics of vertebrates? |
cranium/braincase, backbone (either notochord or vertebral column), and paired appendages/limb girdles |
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14 vertebrate groups |
Myxini, Cephalaspidomorphi, Chondrichthyes, Actinopterygii, Sarcopterygii, Caudata, Caecilians, Anura, Turtles, Crocodilia, Birds, Tautara, Squamates, and Mammals |
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Approximate number of total vertebrate species |
57,000 |
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8 anatomical terms |
anterior (towards head), posterior (towards tail), distal (towards end of appendage), proximal (towards body concerning an appendage), dorsal (back), ventral (belly), medial (towards mid-line), and lateral (away from mid-line) |
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Describe the body form of a fish |
Made of a head, trunk, and tail. Fusiform and hydrodynamic |
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What type of locomotion is the fusiform body shape associated with? |
aquatic |
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Describe the body form of a terrestrial vertebrate |
movable head of constricted, elongated neck. Caudal region constricted and used for balance and communication rather than locomotion. larger, more pronounced limbs |
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Type of locomotion that frees forelimbs for functions other than terrestrial locomotion. Walking on two legs |
bipedal locomotion |
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Type of locomotion that uses strong hind limbs with large bones and associated musculature. Jumping locomotion |
Saltatory locomotion |
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Type of locomotion associated with short, rigid bodies. Flying or gliding |
Aerial locomotion |
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Some functions of vertebrate integument (10) |
Protection, temperature regulation, calcium storage, vitamin D synthesis, water/electrolyte balance, excretion, gas exchange, microbial defense, sensory, and production of pheromones |
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2 layers of vertebrate integument |
epidermis and dermis |
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Describe the two layers of fish integument |
Epidermis: a thin layer of living cells that secretes mucus. Dermis: Bony dermal scales |
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2 functions of terrestrial vertebrate epidermis |
protection from dessication and protection from abrasion |
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2 layers of terrestrial vertebrate epidermis |
Stratum germinativum and stratum corneum |
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Describe amphibian integument |
thin, moist, and highly vascularized |
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What kind of scales do reptiles have? |
epidermal scales |
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Describe bird integument |
thin, covered in either scales or feathers |
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Describe mammal integument |
Thick dermis and covered in hair/fur |
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4 integument accessory structures |
claws, nails, hooves, and beaks |
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What is a vertebral column? |
A sequence of individual vertebra |
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3 parts of a vertebra |
centrum, neural arch, and hemal arch (in fish only) |
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What are the functions of the neural and hemal arches? |
Neural arch: protects spinal cord. Hemal arch: protects the large blood vessel in fish |
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2 vertebral column regions in fish |
trunk and caudal |
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5 vertebral column regions in tetrapods |
cervical, thoracic, lumbar, sacral, and caudal |
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Function of the skull |
supports and protects the brain and sensory organs |
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what three groups have a chondrocranium? |
Myxini, Cephalaspidomorphi, and chondrichthyes |
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How many gill arches did primitive vertebrates have? |
7 |
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How did jaws evolve? |
elements of the first anterior gill arches evolved into jaws and became encased in dermal bone |
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What kind of dentition do amphibians, reptiles, and some mammals have? |
homodont dentition |
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Define homodont dentition |
simple, conical, and numerous teeth that evolved for grasping/holding food |
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3 places that fish have teeth |
palate, tongue, and pharynx |
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Define heterodont dentition |
teeth adapted for different function |
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What type of dentition do most mammals have? |
heterodont |
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4 types of heterodont teeth |
incisors, canines, premolars, and molars |
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In what group of animals are teeth completely lost? |
Baleen Whales |
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In what two groups of animals have teeth been replaced by beaks? |
Turtles and birds |
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What did tetrapod appendages evolve from? |
the fins of lobe-finned fishes |
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3 elements of tetrapod appendages |
proximal, intermediate, and terminal |
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2 characteristics and 2 functions of tetrapod appendages |
characteristics: robust bones and very muscular. Functions: support and move the body |
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Why are posterior limb larger in cursorial animals? |
to provide rapid acceleration and support more body weight |
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Describe the digits of cursorial animals |
reduced |
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What is a homologous structure? |
structures that developed from the same embryonic tissues in two or more organisms sharing a common ancestor |
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What is an analogous structure? |
structures that resemble one another superficially and are uses for the same purpose, but may or may not arise from the same evolutionary structure |
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What is convergent evolution? |
when organisms that are not closely related become similar due to independent adaptations to similar enviroments |
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What type of muscular is prominent in fish? |
axial |
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what are the axial muscles of fish called? |
myomeres |
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describe the axial and appendicular musculature of tetrapods |
the axial musculature is reduced and the appendicular musculature is better developed |
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define "gas exchange" |
the diffusion of oxygen from water or air into the bloodstream, and the diffusion of carbon dioxide from the bloodstream into water or air |
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What are the plate-like structures in fish gills called? |
lamellar structures |
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Describe the two ways air breathing animals draw air into the body |
Amphibians: force air into the lungs. Reptiles, birds, and mammals: reduce the atmospheric pressure of the lungs to pull air in |
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3 animals/groups that use integumentary gas exchange |
amphibians, bats, and turtles |
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What structure in fish is homologous to lungs? |
swim bladder |
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what are the two possible functions of a swim bladder? |
buoyancy control and to supplement gill breathing |
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What system in vertebrates is strongly tied to respiration? |
circulatory system |
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5 main components of the circulatory system |
heart, arteries, capillaries, veins, and blood |
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What are the two components of blood? |
cells (erythrocytes and leukocytes) and plasma |
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6 things blood can transport |
oxygen, carbon dioxide, metabolic products, nutrients, hormones, and antibodies |
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What does endothermic mean? |
can regulate body temperature |
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what does homeothermic mean? |
maintains a constant body temperature |
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describe the circulatory system of a fish |
2 chambered heart, single circuit |
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describe the circulatory system of lung breathers |
3 or 4 chambered heart and increasingly divided circuits |
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Why are increasingly divided circuits important to lung breather circulatory systems? |
increases the concentration gradient of oxygen and carbon dioxide so gas exchange becomes more efficient |
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7 components of the digestive system |
mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus/cloaca |
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Contrast the digestive systems of fish to that of terrestrial vertebrates |
Fish: short, straight tube through the body. Terrestrial vertebrates: longer, more coiled tube. digestive organs move posterior to accommodate increasingly large lungs |
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What do aquatic vs terrestrial digestive systems use for lubrication? |
Aquatic: water. Terrestrial: mucus and saliva |
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3 digestive specializations |
gizzards in bird, chambered stomachs in ruminants, and spiral valves in sharks |
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4 parts of the nervous system (3 are brain) |
forebrain, midbrain, hindbrain, and spinal cord |
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8 components of the forebrain |
olfactory bulb, cerebrum, optic lobe, parietal eye, pineal body, thalamus, hypothalamus, and pituitary |
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In what groups is the forebrain best developed and why? |
hagfish, lampreys, and cartilaginous fish because they locate food using olfactory cues |
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In what groups is the midbrain best developed and why? |
bony fish and amphibians because of the importance of vision in obtaining food |
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What are the 3 parts of the hindbrain? |
cerebellum, medulla, and pons |
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What is the purpose of the cerebellum? |
muscular control and coordination |
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In what group is the hindbrain best developed and why? |
birds because of the need for coordination in flight |
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contrast the nasal region of non-sarcopterygian fishes to all other vertebrates |
non-sarcopterygian fishes: paired, blind ended pits called nasal sacs. Other vertebrates: the nasal region is connected to the oral cavity |
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In what types of vertebrates is vision lost or reduced? |
cave dwelling or subterranean species |
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4 groups that have a parietal eye |
hagfish, lamprey, tuatara, and some squamates |
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What kind of hearing receptors do fish have? |
neuromasts located in the lateral line |
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In what type of vertebrates is hearing best developed? |
noisy |
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4 functions of hearing |
warning, mate attraction, location of food, and social contact |
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2 animals that can hear infrasounds |
elephants and manatees |
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animal that can hear ultrasounds |
bats |
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what is the purpose of the endocrine system? |
to control chemicals in the body |
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What glands secrete hormones |
endocrine glands |
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3 purposes of the kidney |
nitrogenous waste removal, excess salt removal, and water balance |
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2 adaptations of freshwater fish that allow them to survive in water with lower concentration than their body fluids |
large nephrons and very dilute urine |
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Adaptation of bony marine fish and cartilaginous marine fish to help them survive in water with salt concentrations higher than their own body fluids |
bony fish: small nephrons and can excrete salt through gills. Cartilaginous fish: retain urea in body fluids, raising their osmotic pressure |
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2 adaptations that help terrestrial vertebrates retain water |
small filtering components of nephrons and large tubules for reabsortion |
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3 types of kidneys |
pronephros, opisthonephros, and metanephros |
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3 characteristics of pronephros |
developmental stage in all vertebrates, functional in larval fish and amphibians, and the adult kidney in hagfish |
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What are opisthonephros? |
the functional kidneys of adult lampreys, fishes, and amphibians |
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What are metanephros? |
the functional kidneys of birds and mammals |
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What does dioecious mean? |
Species that have a male and female
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Monomorphic vs dimorphic |
monomorphic: males and females are identical. Dimorphic: males and females are distinct |
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What is parthenogenesis? |
When eggs develop without fertilization |
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4 types of species recognition |
sight, sound, smell, and touch |
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3 factors that influence reproductive output |
endotherms vs ectotherms, environmental factors, and method of fertilization |
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Characteristics of external fertilization |
lots of gametes produced, and a low chance of fertilization and survival for each individual offspring |
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Characteristics of internal fertilization |
fewer gametes produced, and a much higher chance of fertilization and survival |
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7 components of an amniotic egg |
shell, chorion, allantios, yolk sac, amnion, amnionic fluid, and embryo |
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What the the purpose of the amnion? |
protection |
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What is delayed fertilization, and what 3 animals can do it? |
Females can store viable sperm for long periods of time. bats, snakes, and turtles |
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4 characteristics of R strategists |
High reproductive rates, small animals, large number of offspring, and reproduce at an early age
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3 characteristics of K strategists |
Low reproductive rates, takes longer to reach reproductive age, and larger animals |
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define precocial |
Well developed at birth or hatching, very independent |
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define altricial |
Underdeveloped at birth or hatching, very dependent on parental care |
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3 modes of reproduction |
oviparous (egg-laying), viviparous (live young), and ovoviviparity (retain eggs in body) |