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| A flatworm has what type of symmetry? |
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| The animal's digestive tract form from the _______. |
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| The embryo layer that forms the skin and nervous tissue is the _______. |
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| A sponge is _____________. |
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| The most complex systems developed from coelom are the __________. |
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| When a cnidarian's tentacles touch a source of food the _______ dishcharge. |
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| Because sponges are sessile, they get their food through _________. |
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| Sponges develop asexually by _______. |
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| Clams are examples of a ________. |
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| Egg, larva, pupa, and adult are ______stages of metamorphosis. |
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| Egg, larva and adult are _________stages of metamorphosis. |
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| Crabs, lobsters, shrimps, and pill bugs are members of the class ________. |
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| The typical tick body consists of _____segments. |
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| Most insects have one pair of ______that are used to sense vibrations, food, and pheromones in the environment. |
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| When a spider bites, it uses its _____. |
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| How many pairs of jointed appendages do arachnids have? |
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| The characteristic that most distinguishes arthropods from other invertebrates is ____________. |
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| When you see a picture of an octopus what clue tells you immediately that it is an arthropod? |
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Definition
| it has no jointed appendages |
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| An animal that retains its chordate features throughout life is the _____. |
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| A seastar can hold tightly to the surface it is touching because of the suction in the ____. |
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| Bony fishes belong to the class _____. |
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| What structure do birds share with no other animals? |
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| What mammal is a monotreme? |
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| The main advantage of hair is that it ____. |
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| A ________ is the sexual form of a cnidarian that has a body form like an umbrella with tentacles hanging down. |
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| A __________ is the asexual stage form of a cnidarian. |
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| Sponges are considered _______because it can produce both eggs and sperm. |
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| A parasitic tapeworm has a knob-shaped head called a ________. |
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| During feeding, planarians extend a tubelike, muscular organ, called the ______, our their mouths. |
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| _________ capture prey by means of nemocysts. |
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| An animal whose blood moves throughout its body within blood vessels has a __________ circulatory system. |
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| The _______is a tongue-like organ with rows of teeth that is used by gastropods to scrape, grate or cut food. |
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| Annelids have a digestive organ called a _______ that grinds organic matter, or food, into small pieces so that is can be absorbed as it passes through the animal's intestine. |
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| A rodlike structure in chordates that becomes a backbone in vertebrates. |
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| The long, spine-covered, tapered arms of seastars are called ______. |
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| The __________ pouches are paired openings located in the pharynx behind the mouth. They are only present during embryonic development in some chordates. |
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| Adult sea squirts retain only their _____slits as indicators of their chordate relationship. |
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| Amphibians are ______ because their body temperature changes with the temperature of the surroundings. |
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| The skeletons of lampreys, hagfishes, and sharks are made of a tough, flexible material called _______. |
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| Many bony fishes possess a ________, which helps control its depth in the water. |
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| Amphibians body temperature changes with the temperature of the __________. |
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| Sharks have ________ fertilization. |
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| A mammal that carries its young inside the uterus until birth is a ______. |
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| A _________ is a mammal that reproduces by laying eggs. |
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| A ________ is a mammal in which the young have a short period of development inside a pouch. |
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| The time during which young placental mammals develop inside the uterus is called _______. |
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| Nourishment of the young inside the uterus occurs through an organ called the ______. |
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| The _________is a hollow muscular organ in female mammals in which the development of offspring takes place |
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| Female mammals have _________ glands that secrete milk, enabling them to nourish their young until the young are mature enough to find food. |
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| A ________ is the sheet of muscle located beneath the lungs that is used to expand and contract the chest cavity of mammals. |
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| Mammalian hair is thought to have evolved from reptilian ________. |
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| An example of a placental mammal is a ____. |
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| An example of a marsupial is the _____. |
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| The type of symmetry found in all adult echinoderms is ____________. |
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