animal kingdomwickscience.weebly.com/uploads/1/1/9/1/119136830/animal_present… · exoskeleton...
TRANSCRIPT
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Animal Kingdom
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We are going to study the following animal phyla:A) Porifera- spongesB) Coelenterata (Cnidaria) - jelly fishC) Platyhelminthes- flat wormsD) Aschelminthes (Nematoda) - round wormsE) Annelida- segmented wormsF) Mollusca- soft bodied (octopus)G) Arthropoda- joined legged with exoskeletonH) Echinodermata- spiny skinned (star fish)I) Chordata- back bone
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Symmetry
Four Types of Symmetry
• SPHERICAL
• RADIAL
• BILATERAL
• ASYMMETRIC
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Spherical - Body plan is a sphere.
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Radial- Body radiates out from one point and is on only
one plane.
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Bilateral - Body is made in two identical mirror images.
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Asymmetric - No definite body plan. The body shows
random growth.
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Body Plan Terminology
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Phylum: Porifera•asymmetrical•egg turns to free swimming larva that attaches to rock and undergoes metamorphosis into adult •the body wall consists of two cell layers•the pores of the body wall are connected to an internal canal system•collar cells - have flagellum that create (1 way) current to draw water and food in to gut•no tissues, organs, nervous system, or brain•no circulatory system (no heart, blood or veins)•no muscle (sessile - do not move)•internal skeleton (endoskeleton) of spicules•example sponges
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Sponge
Body
Plan
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Scuba Sponge
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Tube Sponges
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Phylum Coelenterata (Cnidaria)• radially symmetrical• have true tissue (nerve, muscle, digestive)• have nerve net but no brain• nematocysts – sac containing coiled threadlike
tubes that shoot out and inject toxin (1 tentacle can have over 1000)
• 2 body forms1) free swimming medusa (jelly fish) 2) polyp – sessile (doesn’t move around) tube like body with mouth surrounded by tentacles
• saclike cavity for digestion with single opening• examples: jellyfish, coral, hydra, sea anemone
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Jellyfish
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Coral
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Sun Coral
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Hydra
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Sea anemones
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Phylum Platyhelminthes(Flat Worms)
•free living and parasitic forms
•bilateral symmetry
•first life form to have mesoderm (3rd cell layer)
•true organs – digestive system but with only one opening
•first life form to show cephalization (concentration of nerve tissue in head resembling brain)
•2 ventral nerve cords
•no circulatory system
•examples: tapeworms, planaria, liver flukes
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Human tapeworms have lost most sensory receptors and their digestive tract but have a highly evolved reproductive system. Modified epidermis “tegumant” protects against digestive enzymes and the immune system.
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Head (scolex) of Tapeworm
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Planaria
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Flukes
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Sheep Liver Flukes
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Human Liver Fluke
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Phylum Aschelminthes(Nematoda) - round worms
•are parasitic or free-living
•are bilaterally symmetrical
•has no circulatory or respiratory system
• have a digestive tube with mouth and anus
•lateral ventral nerves running along body
•examples: ascaris, hookworm, trichinella, filaria
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Ascaris (Intestinal Roundworm)- These nematodes are found in humans (and pigs) and are present mostly in unsanitary areas without modern plumbing. Around one in six people worldwide are infected by Ascaris. A study conducted in Cameroon focused on school children and found that 65.5 % were infected with Ascaris parasitic roundworms. Ascaris eggs are spread through feces, and, when ingested, hatch and bore through the intestinal wall. They move to the heart, the lungs, and finally out the breathing passages where they are swallowed, thus perpetuating the cycle. Females lay hundreds of thousands of eggs each day and can reach nearly 30 centimeters in length. The life cycle of the disease was finally discovered in Japan in 1922 when Shimesu Koino, a researcher, infected both a volunteer and himself, and then traced the progress of the disease.
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Ascaris
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Mouth of Hookworm
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Trichinella- This nematode is responsible for the most serious roundworm-caused disease, which is known as trichinosis. They live in pigs’ intestines and produce young that make their way to muscle tissue and form tough cysts. When uncooked pork is ingested by humans, the roundworms cause trichinosis, which can sometimes be fatal. This parasite is also found in bears. In the United States it is suspected that almost two and a half percent of the population are infected with trichinosis.
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Phylum Annelida (Segmented Worms)
•marine, freshwater, or terrestrial
•bilaterally symmetrical
•the body is internally and externally segmented
•appendages are non-jointed or lacking
•the nerve cord is in a ventral position, solid and often paired
•setae – four pairs of bristles on each segment for movement
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Phylum Annelida (Segmented Worms)
• first group to have closed circulatory system(blood flows in closed vessels)
• digestive system includes: mouth, muscular pharynx, esophagus, intestine, anus
• examples: earthworm, leeches, polychaetes
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Earthworm
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Leech
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Marine Polychaete
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Phylum Mollusca (soft body)
•marine, freshwater, or terrestrial
•bilaterally symmetrical or asymmetrical
•no segmentation
•have well-developed digestive and circulatory systems
•highly developed nervous system with large brain with many ganglion (some have image forming eyes)
•extensively folded gills with “gill heart” (pumpsblood back to “systemic heart”)
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Phylum Mollusca (soft body)
• has an organ called a mantle (fold of tissue over the body) which secretes a hard shell
• muscular mantle for water flow & jet power for fast swimming
• examples: octopus, squid, cuttle fish, clams, oysters, mussels, scallops, tooth shells, snails, slugs
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Octopus
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Squid
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Cuttle fish
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Clams
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Oyster
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Mussels
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Scallops
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Tooth Shells
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Land Snails
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Aquatic Snail
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Slugs
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Phylum Arthropoda
• marine, freshwater, or terrestrial
• there are over 1 million types of arthropods (more than any other animal phylum!)
• bilaterally symmetrical
• has a ventral, main nerve cord and dorsal blood vessel
• nerve cord is solid
• muscles are inside the skeleton, it has an exoskeleton
• the body is segmented, but the segments are often fused
• has jointed appendages
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Phylum Arthropoda Class Insecta
•there are more different species of insects than all other animals combined
•there are approximately 1,800,000,000,000,000,000 insects living on the planet
•has one pair of antennae
•the body is divided into 3 parts - head, thorax, and abdomen
•has three pairs of legs on thorax
•examples: butterfly, bee, grasshopper
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A grasshopper’s two large eyes are compound eyes. They are made
up of many separate lenses. The lenses work together to form a
complete picture. A grasshopper uses its compound eyes to see.
Scientists aren’t sure how a grasshopper uses its smaller eyes.
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Leaf Mimic Insect
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Cockroach
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Praying Mantis
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Walking Stick
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Wasp
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Honey Bee
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Phylum ArthropodaClass Arachnida
• two body parts (cephalothorax and abdomen)
• has four pairs of legs
• no antennae
• has no jaws – the feeding appendages may resemble claw-bearing legs
• all spiders have poisonous glands and fangs, but only a few are harmful to humans
• some (orb weavers) spin silk webs
• examples: spider, scorpion, ticks, mites
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Orb Weavers – spin webs
to catch their next
meal!
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Jumping Spider - internal hydraulic system (blood) extends their
limbs by altering the pressure of within them. This enables the spiders to
jump up to 80 times the length of its body without having muscular legs.
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Tarantula
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Black Widow
Adult female
black widow
spiders are
gloss black
with an
hourglass
shaped
marking on the
underside of its
abdomen.
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Scorpion
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Deer Tick
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Dog Tick
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Wood Tick
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Common household dust mites live in the fine layer of minute dust
particles that continually settles on household items. They are associated
with allergies.
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Dust mites favor homes with high humidity levels and
constant warm temperatures.
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Rear end of
tiny mites
feeding on
the dead
skin cells of
an eyelash
hair follicle.
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Rust mite – live on white pine needles
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Flat mite – common in and on various
citrus fruits
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Phylum Arthropoda Class Crustacea
• mainly marine
• has 2 pairs of antennae
• 3 body parts with first two often fused (cephalothorax)
• has respiration by gills
• examples: crab, lobster, crayfish, shrimp, barnacles
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Fiddler Crab
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Lobster
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Crayfish
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Phylum ArthropodaClass Chilopoda
• carnivorous
• has one pair of long antennae
• the entire body is segmented, but flat
• there is one pair of legs on each segment
• has a pair of poison glands behind head
• example: centipede
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House Centipede
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Soil Centipede
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Giant Centipedewith its young!!!
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Chinese Redhead Centipede
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Phylum ArthropodaClass Diplopoda
• feed on plants – herbivorous
• has one pair of long antennae
• there are two pairs of legs on each segment
• has no poison glands
• it curls into a ring when disturbed
• example: millipede
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Common Millipede
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Phylum Echinodermata
•all are marine
•adults are radially symmetrical
•larvae are bilaterally symmetrical
•oral and radial nerve cord
•has an internal limy skeleton, usually with many projecting spines
•a system of water-filled tubes, acting on the suction principle, catches food and assists in locomotion
•examples: starfish, brittle stars, sea urchin, sea cucumber, and sand dollar
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Starfish
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Sea star
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Brittle Star
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Sea urchin
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Sea Cucumber
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Sand Dollar
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Phylum Chordata• marine, freshwater, or terrestrial• bilaterally symmetrical• spinal cord: hollow dorsal nerve tube • notochord: is a flexible rod beneath spinal cord
(which may be lost or replaced during development)• muscles cover skeleton (endoskeleton)• several pairs of pharyngeal slits (through which
water is taken in and passed out) in the throat region (these may be changed or lost during development)
• some segmentation, especially in muscles and nerves
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There are three classes of fish
that are separated based on two
characteristics:1) What type of jaws they have
a) sucker (no jaw)
b) jaw
2) What their skeleton is made of
a) cartilage
b) bone
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Phylum ChordataClass Agnatha
• has no jaws
• has no paired fins
• has a skeleton of cartilage
• has a two-chambered heart
• examples: hagfish, lamprey
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Hagfish
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Lamprey
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Brook Lamprey
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Phylum Chordata
Class Chondrichthyes (Cartilaginous Fish)
• has a jaw and skeleton of cartilage
• has five or more pharyngeal slits externally visible
• has a ventral mouth and nostrils
• has a two chambered heart
• no swim bladder
• lateral line (predatory adaptation for detecting vibrations)
• examples: sharks, skates, rays
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Reef Shark
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Leopard Shark
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Great White Shark
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Hammerhead Shark
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Skates
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Manta Ray
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Stingrays
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Spotted Stingray
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Fresh Water Stingray
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Phylum Chordata
Class Osteichthyes (Bony Fish)
• has a jaw and a skeleton of bone• the pharyngeal slits are covered and are
not externally visible• has a two-chambered heart• have a swim bladder • lateral line (predatory adaptation for
detecting vibrations) • examples: salmon, trout, cod, perch
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Sockeye Salmon
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Coho Salmon
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Ling Cod
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Yellow Perch
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Northern Pike
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Phylum Chordata
Class Amphibia
• have a three-chambered heart
• lack claws on their toes
• seldom have scales
• the eggs have no shells and must be laid in water
• most have lungs (adult) – may also breathe through moist skin
• are cold-blooded
• examples: frog, toad, salamander
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Gray Frog
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Poison Dart Frog
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Baw Baw Frog
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Tomato Frog
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Toad
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American Toad
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Spotted Salamander
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Grotto Salamander
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Cave Salamander
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Phylum Chordata
Class Reptilia
•have scales on skin
•breathe by lungs
•are cold blooded
•have three-chambered heart (except crocs have 4)
•have two pairs of appendages with claws (small and lacking in some)
•egg – leathery shell
•examples: snake, lizard, turtle
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Diamondback Rattlesnake
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Spitting CobraSpitting cobra spit venom from their mouth when defending themselves against
predators which can cause permanent blindness if introduced to the eye. Some species
can "spit" their venom a distance as great as two meters. While spitting is typically their
primary form of defense, all spitting cobras are capable of delivering venom through a
bite as well.
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Bull Snake
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Red-tailed Boa (our snake)
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Python
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Earless Lizard
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Spiny Lizard
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Chuckwalla
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Box Turtle
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Snapping Turtle
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Giant Tortoise They can weigh as much as 300 kg (660 lbs) and can grow to
be 1.3 m (4 ft) long. They are one of the world's longest-living
animals, with an average lifespan of 100 years or more.
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Galapagos Sea Turtle
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Green Sea Turtle
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Komodo Dragon
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Crocodile
Can reach 70 years, 15 feet, 2000 lbs
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Phylum Chordata
Class Aves
•have feathers
•they lay eggs with a hard calcareous shell
•they have wings
•have a four-chambered heart
•are warm-blooded
•examples: sparrow, chicken, ostrich
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Peregrine FalconFastest animal on the planet
in its hunting dive, the stoop,
which involves soaring to a
great height and then diving
steeply at speeds of over
322 km/h (200 mph) hitting
one wing of its prey, so as not
to harm itself on impact. Has
body length of 34–50 cm
(13–20 in) and a wingspan of
around 80–120 cm (31–47 in)
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Bald Eagle
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OstrichCan run at speeds of about
65 km/h (40 mph). Male
ostriches weight up to
155 kg (340 lb). Male
ostriches can be 2.7 m
(9 ft) in height. At one
year of age, ostriches
weigh around 45 kg
(100 lb). An Ostrich can
live up to 75 years.
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Mallard Duck
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Canadian Goose
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Peacock
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Emperor PenguinAdults average about
1.1 m (3 ft 7 in) tall and
weigh 35 kg (75 lb).
Diving penguins reach
velocities of 27 km/h
(17 mph), reach a depth
of 565 m (1,870 ft) and
stay submerged for up to
22 minutes.
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Phylum Chordata
Class Mammalia
• they have hair• the mammary glands (modified sweat glands)
of female secrete milk• give birth to live young• are warm-blooded• have a four chambered heart• the teeth are usually of four well-defined
types: incisors, canines, premolars & molars• examples: primates, cats, bats, whales, etc.
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Male Lion - can exceed 250 kg (550 lb) in weight.
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Lionesses hunt in groups and stalk their chosen prey. They can
reach speeds of 59 km/h (40 mph) for short bursts and must
sneak up to the victim until they reach a distance of
approximately 30 m (98 ft).
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Brown Bat
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Humpback WhaleAdults range in length from 12–16 metres (40–50 ft) and
weigh approximately 36,000 kilograms (79,000 lbs)
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Killer Whale
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Blue Whale - up to 33 metres (110 ft) in length and
181 metric tonnes, it is believed to be the largest
animal ever to have existed.
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Star-Nosed MoleThe mole's most distinctive feature is a circle of 22 mobile, pink,
fleshy tentacles at the end of the snout. These are used to identify
food by touch, such as worms, insects and crustaceans.
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Duck Billed PlatypusThey are the only mammals that lay eggs rather than giving birth to
live young. The male Platypus has a spur on the hind foot that
delivers a venom capable of causing severe pain to humans
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Female
kangaroo and
her joey are
from the
marsupial
family.
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New born joey sucking on teat of
mother in pouch.
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Large males can be 2 metres (6 ft 7 in) tall, weigh
90 kg (200 lb) and reach speeds of up to 70 km/h.