Test 3 Bio

specialized segments

A characteristic of arthropods that has allowed for their great success is the presence of ________.

amphibians

According to this phylogenetic tree, the animals most closely related to reptiles and mammals are _______.

molluscs

According to this phylogenetic tree, the clade that includes echinoderms and chordates is most closely related to the clade the includes _________ .

octopus

An ________ is an example of a mollusc that does not have a shell.

sponges lack true tissue

How do sponges differ from all other animals?

rotifers

Nematodes are most closely related to _________.

Nematoda

Roundworms are classified in the phylum _______.

chitin

The arthropod skeleton is composed of _______.

medusa

The mobile stage of the cnidarian life cycle is the _________ stage.

they have a digestive system with two openings

Which of these statements is true of nematodes?

insects

_______ are the most diverse group of arthropods.

a soft shell

a characteristic of cnidarians is __________.

a backbone

a distinguishing feature of vertebrates is the presence of ______.

segmentation

a distinguishing feature of vertebrates is the presence of ________.

cnidaria

a sea anemone belongs to which phylum?

echinodermata.......nematoda

a sea star and hookworm to the phyla _________ and _______, respectively.

porifera

a sponge belongs to which phylum?

arthropods

according to this phylogenetic tree, annelids are most closely related to _______.

platyhelminths

according to this phylogenetic tree, cnidarians are most closely related to ________.

precambrian

animals can trace their lineage to a common ancestor that lived in the ______.

are segmented worms

annelids ________.

exhibit radial symmetry

as adults, sea stars ________.

motility and active predation and escape

bilateral symmetry in the animal kingdom is best correlated with

giant squid and snail... mollusca

consider the following list of animals: giant squid, earthworm, largemouth bass, snail, tapeworm, coral, and sea star. The two that belong to the same phylum are the ________, and the __________, and their phylum is _______.

annelida

earthworms are in the phylum _______.

leeches

earthworms are most closely related to ________.

have true tissues

flatworms are similar to cnidarians in that both _______.

have true tissues

flatworms are similar to cnidarians in that both __________.

bilateral symmetry

flatworms are the simplest animals with _______.

Arthropoda

grasshoppers are classifies in the phylum _______.

spiracles and teacheae

grasshoppers respire via _________.

the chitinous exoskeleton cannot grow

in arthropods, molting is necessary because _______.

are soft-bodied and usually covered by a shell

members of the phylum mollusca _________.

a body plan with only one was to split it into two equal halfs - right down the midline

one body plan, called bilater symmetry represents a major branch point in a animal evolution and can be described as

echinoderms

sea stars and sand dollars belong to a group of spiny marine animals called _______.

mollusca

snails are classified in the phylum _______.

filtering small particles from water

sponges feed by

flatworm

the figure below shows a planarian. Bilateral symmetry, the leaflike shape, and the highly branched gastrovascular cavity all suggest that the planarian is an _______.

annelid

the legless, segmented body of the animal below suggests that is is an _________.

digestion

the water vascular system of a sea star functions in _________.

a water vascular system

what characteristic is unique to echinoderms?

choanocytes

what name is given to the food-trapping cells of sponges?

radial

what type of symmetry does this organism exhibit? *jellyfish*

stinging cells, radial symmetry

which of the following are found in members of the phylum cnidaria?

a sponge

which of the following is an invertebrate?

a definite "head end"

which of the following is associated with bilateral symmetry.

a doughnut

which of the following is radially symmetrical?

an alimentary system with two openings

which of these characteristics is common to both snails and earthworms.

tube feet

which of these is a characteristic of sea stars?

they have a nerve net

which of these statements is true of cnidarians?

they have a body cavity

which of these statements is true of earthworms

arthropoda

while on a biological expedition, you discover a new species with the following characteristics: has an exoskeleton, exhibits bilateral symmetry, and has jointed appendages. What phylum does this new discovered organism belong to?