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Learn about invertebrates and vertebrates, as well as the different body structures and classifications found in various animals.
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Animals that have no backbone, or vertebral column, are called • Invertebrates • Vertebrates • Ectoderms
A blastula is a stage in the development of an embryo that consists of a • Solid ball of cells • Hollow ball of cells • Flat sheet of cells
Which of the following animals has an asymmetrical body plan? • Jellyfish • Coral • Sponge
When an animal zygote undergoes a series of divisions to form a hollow ball of cells, it is called a(an) • Blastula • Spicule • Ectoderm
An animal that has distinct left and right sides shows • Bilateral symmetry • Several planes of symmetry • Radial symmetry
Animals that have a backbone, or vertebral column, are called • Vertebrates • Invertebrates
The opening through which wastes leave a digestive tract is the • Mouth • Coelom • Anus
Animals that do not have backbones are called • Vertebrates • Invertebrates
Hollow Ball Of Cells Blastula
Concentration of sense organs and verve cells at the front end of the body Cephalization
The most active mollusks are the • Gastropods • Cephalopods • Bivalves
The thin layer of tissue that covers a mollusk’s body is called the • Mantle • Foot • Visceral mass
A pond snail is an example of a(an) • Gastropod • Flatworm • Roundworm
The skeleton of an echinoderm is an • Exoskeleton made of calcium carbonate • Exoskeleton made of chitin • Endoskeleton made of calcium carbonate
In an echinoderm, the structure that operates like a living suction cup is the • Madreporite • Tube foot • Stomach
The echinoderms that look like warty, moving pickles are • Sea urchins • Sea cucumbers • Sea stars
The foot of most cephalopods is divided into eight or more arms called • Chelipeds • Mandibles • Tentacles
The function of mandibles is to • Bite and grind food • Sense the environment • Propel an arthropod when it swims
An example of a chelicerate is a • Spider • Lobster • Crayfish
Spiders feed by • Swallowing their prey whole • Biting off and swallowing pieces of their prey • Sucking up prey tissues that have been liquefied by enzymes.
An insect can detect minute movements in its environment by using its compound eyes and its • Tracheal tubes • Malpighian Tubules • Sensory hairs
Which of the following explains why flying has been beneficial to insects? • Nymphs can escape most predators. • Insects can disperse long distances and colonize a variety of habitats. • Insect societies can communicate without using pheromones.
What does molting enable arthropods to do? • To breathe • To reproduce • To grow
Insects are classified as • Crustaceans • Arachnids • Uniramians
How many pairs of legs are there on most body segments of a centipede? • One • Two • Five
The compound eyes of insects • Are made of many lenses • Are located on the thorax • Produce an image that is more detailed than what humans see.
The body of an insect is divided into a • Head and a thorax • Head and a cephalothorax • Head, a thorax, and an abdomen
Unlike plants, sponges are • Heterotrophic • Autotrophic • Unicellular
Sponges reproduce sexually through a process called • Cephalization • Internal fertilization • Radial symmetry
Cnidarians have two basic body types, a medusa and a (an) • Larva • Tentacle • Polyp
The nerve cells of cnidarians make up a (an) • Nerve net • Hydrostatic skeleton • brain
What is a digestive chamber with one opening called? • Gastrovascular cavity • Central cavity • Blastula
The class of Scyphozoa contains • Jellyfishes • Hydras • Corals
The stinging cells of cnidarians are called • Thigmotropism • Cephalization • Cnidocytes
What are specialized cells hat remove excess water from the body? Flame Cells
In free-living flatworms, what organ pumps food into the digestive cavity? • Coelom • Ganglia • Pharynx
Many flatworms can detect changes in the amount of light in their environment using groups of cells called • Nerve cords • Eyespots • Flame cells
In the tapeworm, both male and female reproductive organs are contained in each mature • Scolex • Proglottid • Cyst
In a pseudocoelom, mesoderm partially lines the • Germ layer • Body cavity • Blood vessels
In annelids, nitrogen-containing wastes are eliminated by • Clitella • Parapodia • Nephridia
The tube like structure which water enters and leaves a mollusk’s body is the • Sinus • Siphon • Coelom
Some flatworms have clusters of nerve cells that control the nervous system. Each cluster is called a (an) • Ganglion • Brain • Eyespot
Which of the following is a parasitic roundworms? • Trichinella • Schistosoma • A tapeworm
Roundworms have a digestive system • With two openings • With one opening • Within a true coelom
The body of an annelid has • A backbone • An external shell • Segments
In most fishes, the structures that are most important for obtaining oxygen from water are the • Scales • Gills • Lungs
After passing through the gills of a fish, blood circulates through the rest of the body and then collects in the • Sinus venosus • Atrium • Bulbus arteriosus
A frog’s tympanic membranes would be most useful for • Enabling the frog to jump long distances • Filtering wastes from the frog’s blood • Listening to the mating calls of other frogs
A vertebrate is any chordate that has a • Backbone • Notochord • Hollow nerve cell