BIO101- Unit 7

Sponges exhibit radial symmetry. Select one: True False

False

What system do the cnidaria have that sponges lack? Select one: a. respiratory b. nervous c. circulatory d. excretory e. reproductive

nervous

The segments of a tapeworm consisting primarily of eggs, which hang in bags as a long chain behind the head, are called Select one: a. proglottids. b. cercariae. c. sporocysts. d. scolexes. e. glycocalyxes.

proglottids

Which statement is NOT true about echinoderms? Select one: a. The exoskeleton is made up of bony tissue. b. Gas exchange occurs through gills on the skin. c. Larvae are free-swimming and bilaterally symmetrical. d. A water vascular system allows the tube feet to produce suction. e. Symmetry is radial in the adult, usually with parts in fives or multiples of five.

a. The exoskeleton is made up of bony tissue.

Which type of animal symmetry produces mirror images of each other no matter how the animal is sliced longitudinally? Select one: a. radial symmetry b. asymmetrical symmetry c. bilateral symmetry d. asymmetrical symmetry and bilateral symmetry e. None of these.

a. radial symmetry

Which pair exhibits the closest relationship? Select one: a. spider—tick b. housefly—mite c. earthworm—grasshopper d. crayfish—planarian e. scorpion—clam

a. spider—tick

The insect organ most equivalent to the human lung in function is the Select one: a. tracheae. b. midgut. c. crop. d. gizzard. e. Malpighian tubule.

a. tracheae.

If echinoderms are radially symmetrical, why are they considered primitive relatives of cnidarians? Select one: a. Echinoderms branched from cnidarians but are considered more advanced because they also gave rise to chordates. b. The echinoderm larvae are originally bilaterally symmetrical but metamorphose into a radially symmetrical adult. c. Radial symmetry is maintained as a primitive state by all animals in the embryonic stage and can appear anywhere. d. Echinoderms are the most primitive of the deuterostomes and evolution begins in each group with radial symmetry. e. Echinoderms have a five-sided bilateral symmetry that just appears to be radial.

b. The echinoderm larvae are originally bilaterally symmetrical but metamorphose into a radially symmetrical adult.

Which of the following is NOT a characteristic of echinoderms? Select one: a. adult is radially symmetrical b. locomotion by muscles c. endoskeleton of spiny, calcium-rich plates d. larva is bilaterally symmetrical e. both sexual and asexual reproduction

b. locomotion by muscles

An adaptation exhibited by the tapeworm for survival in a host's intestine is Select one: a. proglottids coated with calcium carbonate. b. alkaline secretions from the scolex. c. a protective lining of chitin. d. eggs before the proglottids are digested. e. a tough integument resistant to host digestive fluids.

e. a tough integument resistant to host digestive fluids.

Which of the following are NOT cnidaria? Select one: a. corals b. planaria c. sea anemones d. hydrozoa e. Portuguese man-of-war

b. planaria

Planaria feed by Select one: a. attaching with a sucker(s) and extracting blood. b. tearing and sucking food particles via a muscular pharynx. c. slurping food particles through a mouth and excreting waste via an anus. d. soaking all nutrients from the environment through its thin epidermal surface. e. grabbing food with tentacles and pulling them into a ventrally located mouth.

b. tearing and sucking food particles via a muscular pharynx.

Which of the following organisms show the typical method of acquiring food that is found in animals? Select one: a. Euglena, who are autotrophic and heterotrophic. b. Basidiomycetes, club fungi, who decompose wood and other plant material. c. Earthworms, annelids, who feed on any available organic matter that they can take into their mouths d. Volvox, a colonial alga that is autotrophic e. Archaea, who are chemotrophic.

c. Earthworms, annelids, who feed on any available organic matter that they can take into their mouths

Which statement about arachnids is NOT true? Select one: a. Ticks and mites are often parasitic. b. Spiders and scorpions are predators. c. Spiders have trachea for respiration. d. Spiders have a pair of fangs which release poison. e. The body parts include a cephalothorax and an abdomen.

c. Spiders have trachea for respiration.

Which of the following is NOT true about protostomes? Select one: a. They are types of advanced invertebrates. b. They form a true coelom. c. The first opening during embryonic development becomes the anus. d. They will become mollusks, annelids, and arthropods. e. They are more advanced than acoelomates, but not as advanced as deuterostomes.

c. The first opening during embryonic development becomes the anus.

Earthworms possess both male and female organs on separate segments; thus mating consists of "parallel parking" in opposite directions and cross-fertilizing. Given this, which of the following is/are true? Select one: a. This is evidence of a primitive state that is generally less efficient than separate sexes. b. This is primarily to allow them to self-fertilize if no other worm is in their sector of the soil. c. This is an advantage since they can mate with any other earthworm of the same species that they encounter. d. Maintaining any system not clearly male or female is disadvantageous; the earthworm is trapped in an evolutionary dead end. e. This demonstrates the how ineffective self-fertilization is as a means of reproduction.

c. This is an advantage since they can mate with any other earthworm of the same species that they encounter.

When an earthworm secretes a slime layer to receive eggs and sperm and form a ''cocoon,'' this secretion is produced by the Select one: a. annulations. b. peritoneum. c. clitellum. d. nephridium. e. prostomium.

c. clitellum.

Ascaris is considered to be a(n) Select one: a. flatworm. b. earthworm. c. roundworm. d. cnidarian. e. arthropod.

c. roundworm.

Which statement about sponges is NOT correct? Select one: a. The larval form is flagellated and able to swim to a suitable location. b. Sponges are classified on the basis of their type of skeletal material. c. Sponges resemble a colony of protozoan cells more than a multicellular animal. d. Sponges are thought to be on the evolutionary pathway leading to more complex animals such as corals and worms. e. Sponges can reproduce sexually or asexually.

d. Sponges are thought to be on the evolutionary pathway leading to more complex animals such as corals and worms.

Which of the following statements about hydra morphology is correct? Select one: a. The hydra has a long single tentacle containing numerous nematocysts. b. The hydra has a single polyp that is filled with gas and keeps the organism afloat. c. The hydra is bell shaped and has multiple tentacles. d. The hydra is a tube shaped polyp that has two layers of tissue. e. The hydra is bilaterally symmetrical.

d. The hydra is a tube shaped polyp that has two layers of tissue.

Which of the following characteristics is NOT true about deuterostomes? Select one: a. The second opening during embryonic development becomes the mouth. b. They include the echinoderms and humans. c. They have a coelom. d. They include the simplest of invertebrates.

d. They include the simplest of invertebrates.

A closed circulatory system is found in Select one: a. insects. b. snails. c. clams. d. earthworms. e. scorpions.

d. earthworms.

A recent study of the marine hawksbill turtle's stomach contents revealed that sponges constitute a major portion of their diet. Sponge beds are generally protected from predators by the sponge's calcium and silica crystals, but these were found in quantity in the turtles' digestive systems. These structures that protect the sponges from most predators, but not turtles, are Select one: a. amoebocytes. b. the osculum. c. choanocytes. d. spicules. e. spongin.

d. spicules.

Which statement is NOT true about invertebrate animals? Select one: a. The vast majority of animal species are invertebrates. b. Many invertebrate species live in a marine environment. c. Most animal phyla are invertebrates. d. All major invertebrate groups arose from protistan ancestors. e. Invertebrates lack a nervous system.

e. Invertebrates lack a nervous system.

Which of the following is NOT characteristic of earthworms? Select one: a. segmentation b. expanded dorsal surface of the intestine called a typhlosole c. hermaphroditic d. paired nephridia in each segment e. dorsal solid nerve cord

e. dorsal solid nerve cord