Test #6 (ch.28)

Bilaterally symmetrical animals - tend to be active and move forward. - tend to exhibit cephalization. - have right and left sides when cut longitudinally. - All of the choices are correct.

All of the choices are correct. All of the choices are correct. Bilaterally symmetrical animals tend to be active and move forward, tend to exhibit cephalization and have right and left sides when cut longitudinally.

Which method of reproduction is used by members of Phylum Echinodermata? - sexual - asexual - budding - fragmentation - Both sexual and asexual

Both sexual and asexual

Which phyla are classified in the Deuterostomia? - Mollusca & Chordata - Arthropoda & Vertebrata - Chordata & Vertebrata - Echinodermata & Chordata - Annelida & Mollusca

Echinodermata & Chordata

Which of the following list of features describes the molluscs and bivalves but not the annelids? - Lack of cephalization, contain a muscular foot and a mantle, may posses a hard outer shell and have a complete digestive system. - Presence of cephalization, contain a muscular foot and a mantle, may posses a hard outer shell and have a complete digestive system. - Lack of cephalization, contains circular muscles that enable them to move, may posses a hard outer shell and have a complete digestive system. - Lack of cephalization, every member of the group will have a hard outer shell as well as a complete digestive system. - None of these lists describes the molluscs and bivalves but not the annelids.

Lack of cephalization, contain a muscular foot and a mantle, may posses a hard outer shell and have a complete digestive system. The features found in the molluscs and bivalves but not the annelids include lacking cephalization, containing a muscular foot and a mantle, may posses a hard outer shell and have a complete digestive system.

Which statement is NOT correct about the roundworms? - There are three layers of tissues in the body. - Roundworms have a tube-within-a-tube body plan. - There is an internal body cavity called a pseudocoelom. - Roundworms have a smooth unsegmented outside body wall. - Roundworms are all parasitic.

Roundworms are all parasitic.

Which of the following is NOT a characteristic of all animals? - Animals are heterotrophic by ingestion or absorption. - Animals produce gametes by meiosis. - Animals digest their food internally. - Animals are multicellular eukaryotes. - The adult form is diploid in an alternation of generation life cycle.

The adult form is diploid in an alternation of generation life cycle.

Which statement is NOT true about echinoderms? - The exoskeleton is made of spiny plates. - Gas exchange occurs through skin gills and tube feet. - Larvae are free-swimming and bilaterally symmetrical. - A water vascular system allows the tube feet to produce suction. - Symmetry is radial in the adult, usually with parts in fives or multiples of five.

The exoskeleton is made of spiny plates.

What is the function of the buds formed by hydras? - They aid in digestion. - They develop into cnidocytes and can be used in defense. - They develop into the nerve net and are used to detect prey. - They produce new epidermal tissue to replace the old tissue. - They are a form of asexual reproduction.

They are a form of asexual reproduction.

Identify which of the following feature(s) are found in the cnidarians but not in the comb jellies. - They are free swimming invertebrates. - They contain a capsule called a nematocyst. - Produce movement by the beating of cilia. - Much of the body is composed of a jellylike substance called mesoglea. - These species can be found in the marine environment.

They contain a capsule called a nematocyst. The only feature unique to the cnidarians is the presence of a capsule called a nematocyst.

Which body structure describes the freshwater hydra? - a swimming medusa with the mouth pointing downward - a swimming medusa with the mouth pointing upward - a sessile medusa with the mouth pointing upward - a sessile polyp form with the mouth pointing downward - a freely moving polyp with the mouth pointing upward

a sessile polyp form with the mouth pointing downward A hydra is best described as a sessile polyp with the mouth pointing downward.

Flukes are divided into Monogenea and Digenea. Monogenea have a posterior holdfast with hooks, clamps, and suckers; Digenea have suckers but never hooks and clamps. Monogenea have only one host in the life cycle, and usually live on gills or skin of fish and amphibians; Digenea have at least two hosts and often three or more, and are named because they have two reproductive states in their life cycle (an adult and intramolluscan phase). From what you now know, the blood fluke Schistosoma would therefore be - an endoparasite and Monogenean. - an endoparasite and Digenean. - an ectoparasite and Digenean. - an ectoparasite and Monogenean.

an endoparasite and Digenean. The blood fluke is an endoparasite and a Digenean.

Which of these statements is NOT correct about the flatworms? Flatworm(s) - embryos are triploblastic. - are deuterostomes. - have a sac body plan with an incomplete gut. - are free-living or parasitic. - are in Phylum Platyhelminthes.

are deuterostomes.

A person working in a rice paddy in Asia becomes infected with the liver fluke by - eating infected snails. - drinking water contaminated with eggs. - eating infected fish that was undercooked or raw. - swimming or wading in infected water, where the cercariae enter the skin.

eating infected fish that was undercooked or raw. A person working in a rice paddy in Asia becomes infected with the liver fluke by eating infected undercooked or uncooked fish.

Human tapeworm infections occur by - eating insufficiently cooked infected pork or beef. - being bitten by a mosquito. - ingesting eggs in contaminated water. - eating freshly peeled fruit. - All of the choices are correct.

eating insufficiently cooked infected pork or beef. Human tapeworm infections occur by eating insufficiently cooked infected pork or beef.

Which reproductive method would most likely lead to the greatest chance of success in sea stars? - fragmentation - sexual reproduction - budding - None of these methods would be successful.

fragmentation Fragmentation would lead to the greatest chance of success.

Marine annelids (polychaetes) are different than earthworms in that polychaetes - lack the setae that earthworms have. - have paddle-like parapodia that earthworms do not have. - have segments, whereas marine annelids do not. - lack a larval form, whereas earthworms have a larvae form. - marine annelids have a well developed coelom, whereas earthworms do not.

have paddle-like parapodia that earthworms do not have.

Which of the listed organisms do not possess the necessary features to be classified as a member of phylum Mollusca? - clams - squids - lobsters - nautiluses - snails

lobsters Lobsters are not in Phylum Mollusca, but are crustaceans in Phylym Arthropoda. Clams, squids, nautiluses, and snails are molluscs.

Animals are classified according to all of the following features EXCEPT - presence or absence of segmentation. - mode of reproduction. - type of body symmetry. - number of germ layers. - molecular data.

mode of reproduction. Animals are classified according to presence or absence of segmentation, type of body symmetry, germ layers present, and molecular data. They are not classified according to mode of reproduction.

Which of these is a bivalve? - slug - octopus - earthworm - snail - oyster

oyster

Roundworms and arthropods are both ecdysozoans. This means they - have a trochophore larvae. - have a body cavity that is completely lined with mesoderm. - have the anus arise at or near the blastopore. - periodically shed their outer covering. - None of the above are true.

periodically shed their outer covering. Roundworms and arthropods are both ecdysozoans. This means they periodically shed their outer covering.

The easiest method of preventing sea stars from moving is to ____________. - plug their madreporite - cut off 2 of their arms - squeeze the tube feet as they are extended from the body - lay them on their arboreal side - None of the above would prevent a sea star from moving.

plug their madreporite Plugging the madreporite would prevent the function of their water vascular system which would prevent them from moving .

In _______, the mouth develops at or near the blastopore. - gastrocoelomates - blastocoelomates - protostomes - deuterostomes - triploblastics

protostomes In protostomes, the mouth develops at or near the blastopore.

The only animal in which digestion occurs within cells is - comb jellies. - flatworms. - sponges. - cnidarians.

sponges. The only animal in which digestion occurs within cells is the sponge.

Sponges feed differently than comb jellies because a sponge feeds by - acting as a net in a current that sweeps food particles into its central cavity and digests them externally. - squeezing the spongocoel cavity and sucking debris in and out through the osculum. - the beating of collar cells' flagellae, which form a current; the current brings food particles which are engulfed and digested by collar cells. - the beating collar cells form a current from osculum to pores; the food is engulfed by amoebocytes in the central cavity of the sponge.

the beating collar cells form a current from osculum to pores; the food is engulfed by amoebocytes in the central cavity of the sponge. A sponge feeds by the beating of collar cells' flagellae, which form a current. The current brings food particles which are engulfed and digested by collar cells.

Which statement most accurately describes the colonial flagellate hypothesis? - Animals are descended from an ancestor that resembles a spherical colony of flagellated cells. - Both animals and fungi are descended from an ancestor that resembles a spherical colony of flagellated cells. - All animals are descended from an ancestor that resembles a single celled organism that was a flagellated cell. - None of these describe the colonial flagellate hypothesis.

Animals are descended from an ancestor that resembles a spherical colony of flagellated cells. The colonial flagellate hypothesis states that animals are descended from an ancestor that resembles a spherical colony of flagellated cells.

Which of the following features are found within the lophotrochozoa? - Bilateral symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as protostomes. - Bilateral symmetry at some point in their life, two germ layers as embryos, are aquatic, and are classified as protostomes. - Bilateral symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as deuterostomes. - Bilateral symmetry at some point in their life, three germ layers as embryos, are terrestrial, and are classified as protostomes. - Radial symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as protostomes.

Bilateral symmetry at some point in their life, three germ layers as embryos, are aquatic, and are classified as protostomes.

Which statement concerning body symmetry is not correct? - In radial symmetry, two identical halves are obtained regardless of how the animal is sliced longitudinally. - The evolution of bilateral symmetry is accompanied by cephalization. - Asymmetrical animals have no body shape. - Bilaterally symmetric animals are usually sessile. - Radial symmetry is useful because the animals can reach out in all directions.

Bilaterally symmetric animals are usually sessile.

Which list of traits is characteristic of the ecdysozoans? - Periodically shed their outer covering, non-segmented body plan and pseudocoelom on some, contain an exoskeleton and undergo metamorphosis. - Periodically shed their outer covering, non-segmented body plan and contain a layer of jellylike fluid called mesoglea, contain an exoskeleton and undergo metamorphosis. - Periodically shed their outer covering, segmented body plan and pseudocoelom on some, contain an endoskeleton and undergo metamorphosis. - None of the these are correct.

Periodically shed their outer covering, non-segmented body plan and pseudocoelom on some, contain an exoskeleton and undergo metamorphosis. Ecdysozoans periodically shed their outer covering, non-segmented body plan and pseudocoelom on some, contain an exoskeleton and undergo metamorphosis.

Which of the following features is common among the roundworms as well as the arthropods? - Periodically shed their outer covering. - Radial symmetry. - Endoskeleton. - Undergo metamorphosis. - Segmentation is readily apparent.

Periodically shed their outer covering. Both roundworms and the arthropods will periodically shed their outer covering.

Molluscs share a three-part body plan consisting of a - scolex, proglottids, and an anus. - corona, stomach, and intestines. - visceral mass, mantle, and foot. - eyespots, digestive system, and nervous system.

visceral mass, mantle, and foot. Molluscs share a three-part body plan consisting of a visceral mass, mantle, and foot.