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some chordates do not have
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an animal whose body temperature changes depending on the environment
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Animals 2
| Question | Answer |
|---|---|
| some chordates do not have | gills |
| an animal whose body temperature changes depending on the environment | ectotherm |
| the three major groups of fishes are distinguished from one another by the types of ______ they have | skeletons |
| gills and lungs enable ______ to get into an animal's blood | oxygen |
| amphibian means | double-life |
| most snakes have only one | lung |
| which of the following groups descended from reptiles | mammals and birds |
| unlike most fishes, sharks cannot | pump water over their gills |
| small bones called _______ line up in a row to form the backbone | vertebrae |
| the skeletons of lampreys and hagfishes are made of | cartilage |
| a _________ helps a bony fish stabilize its body at different depths in the water | swimbladder |
| ___________ are reptiles whose bodies are covered by a protective shell | turtles |
| most fishes have _____ fertilization | external |
| a paleontologist is a scientist who studies ____ | fossils |
| during metamorphosis, most salamander larvae lose their _____ | gills |
| an animal in whose bodies are produce internal heat | endotherm |
| _______ and _____ lay their eggs externally in water | fish, amphibians |
| all kinds of birds and all kinds of mammals | are endotherms |
| the difference in _____ above and below a wing causes lift | air pressure |
| birds usually sit on their eggs to | keep the eggs warm |
| all kinds of birds | lay eggs |
| all mammals feed their young with | milk |
| both a mammal's fur and a bird's feathers function to help the animal | keep warm |
| _____ feathers trap air next to a bird's body | down |
| birds can store food in an organ called a _____ before the food goes to the stomach | crop |
| all mammals are | vertebrates |
| _____ feathers help a bird keep its balance during flight | contour |
| the angle and shape of a bird's _____ provide lift | wing |
| what are four characteristics that all birds share? | endothermic, vertebrate, feathers, lay eggs |
| what are three adaptations that enable birds to fly? | hollow bones, contour feathers, wing angle |
| vertebrates with soft, unsegmented bodies that are often protected by a hard outer shell | mollusks |
| an organ in a mollusk that can crawl, dig, or catch prey | foot |
| organs that remove oxygen from the water | gills |
| a system in which the blood is not always inside blood vessels and the heart pumps blood into a short vessel that opens into the body spaces containing the internal organs | open circulatory system |
| mollusks have _____ symmetry | bilateral |
| the three major groups of mollusks are ________, _____, and _____ | gastropods, bivalves, cephalopods |
| the larger group of mollusks including snails and slugs and have a single shell or no shell at all | gastropods |
| animals that eat only plants | herbivores |
| animals that eat only other animals | carnivores |
| mollusks that have two shells held together by hinges and strong muscles that include oysters, clams, scallops, and mussels | bivalves |
| animals that eat both plants and animals | omnivores |
| an ocean-dwelling mollusk whose foot is adapted to form tentacles around its motuh | cephalopod |
| cephalopods are the only mollusks with a _____ circulatory system | closed |
| cephalopods swim by ____ _____ | jet propulsion |
| a tissue that covers internal organs | mantle |
| the major groups of arthropods are _______, ________, _________ and ________, and _________. | crustaceans, arachnids, centipedes, millipedes, insects |
| invertebrates that have an external skeleton, a segmented bdoy, and jointed attachemnts called appendages | arthropods |
| arthros means | joint |
| pod means | leg |
| the process of shedding an outgrown exoskeleton | molting |
| an appendage attached to the head that contains sense organs | antenna |
| the bodies of arthropods are ______ | segmented |
| an arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae | crustacean |
| _____ includes crayfish and lobster | crustaceans |
| a process in which an animal's body undergoes dramatic changes in form during its life cycle | metamorphosis |
| _______ and _______ are arthropods with two body sections and many pairs of legs | centipedes, millipedes |
| millipede means | thousand feet |
| centipede means | hundred feet |
| arthropods with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings | insects |
| the midsection to which wings and legs are attached | thorax |
| a process with four diferent stages: egg, larva, pupa, and adult | complete metamorphosis |
| wings, legs, and antennae form inside a protective covering | pupa |
| a system has no distinct larval stage | gradual metamorphosis |
| an egg hatches into a stage which usually looks like the adult insect without wings | nymph |
| at some point _______ will have a notochord | chordates |
| a nerve cord that runs down their back, and slits their throat area | notochord |
| a felxible rod that supports a chordate's back | notochord |
| a ______ has a backbone that is part of an internal skeleton | vertebrate |
| many similar bones that the backbone is formed by | vertebrae |
| the body temperature of most fishes, amphibians, and reptiles is ____ to the temperature of their environment. birds and mammals have a _____ body temperatue that is often warmer than their environment | close, stable |
| a vertebrate that lives in water and uses fins to move | fish |
| most fishes are _______, obtain oxygen through gills, and have scales | ectotherms |
| most fishes have _____ fertilization | external |
| three major groups of fishes are ____ fishes, _________ fishes, and ____ fishes | jawless, cartilaginous, bony |
| a vertebrate that is ectothermic and spends its early life in water | amphibian |
| amphibian means | double life |
| after beginning their lives in ____, most amphibians spend their adulthood on ____, returning to ____ to reproduce | water, land, water |
| the larva of a frog or a toad | tadpole |
| organs of air-breathing vertebrates in which oxygen gas and carbon dioxide gas are exchanged betwen the air and the blood | lungs |
| chambers of the heart | atria |
| the specific environment in which it lives | habitat |
| lay eggs on land | reptiles |
| an ectothermic vertebrate that has lungs and scaly skin | reptile |
| organs that filter wastes from the blood | kidneys |
| watery fluid in which waste is excreted | urine |
| an egg with a shell and internal membranes that keep the embryo moist | amniotic egg |
| reptiles have ____ fertilization | internal |
| both lizards and snakes are reptiles that have skin covered with ______ scales | overlapping |
| a reptile whose body is covered by a protective shell that includes the ribs and the backbone | turtle |
| unlike most other reptiles, crocodiles and alligators ____ for their eggs and newly hatched young | care |
| the hardened remians or other evidence of a living thing that exxisted a long time ago | fossil |
| the scientists who study extinct organisms, esamine fossil structure and make comparisons to present-day organisms | paleontologists |
| vertebrates are a subrgroup of | chordates |
| a fish | has fins |
| a tadpole is the larva of a | frog or toad |
| a reptile | lays eggs |
| layers of clay, sand mud, or silt harden and become | sedimentary rock |
| a bony fish uses its _____ to stsabilize its position in the water | swim bladder |
| _______ obtain oxygen through gills and have scales | fishes |
| an _______ is a characteristic of reptiles | amniotic egg |
| ________ are scientists who study fossils | paleontologists |
| how do fishes reproduce | externally |
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stephaniedo