Questions 12-13: Refer to the given below A scientist discovered a new species and was unsure how to classify it, so she decided to undergo thorough observation accompanied by some experiments to have a clear idea of the species. The results of her observations and her experiments are found in the table below. \begin{tabular}{|l|l|} \hline Observation/experimentation & Result \\ \hline Symmetry & bilateral symmetry \\ \hline circulatory system & closed circulatory system \\ \hline excrete wastes through & nephridia \\ \hline body segmentation & present \\ \hline \end{tabular} 12.In which of the following phyla could this living organism be placed in? A. Porifera B. Cnidarian C. Annelida D. Mollusk E. Arthropod
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Step 1: Analyze the given characteristics of the new species: - Bilateral symmetry - Closed circulatory system - Excretes wastes through nephridia - Body segmentation present Show more…
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Question 13 This animal belongs to the Phylum: Arthropoda Porifera Annelida Nematoda Platyhelminthes
Suman K.
What types of organisms are in the phylum Platyhelminthes? A) Flatworms B) rotifers C) Segmented worms (earthworms) D) corals 2: A primitive animal discovered by scientists is clearly multicellular and shows no symmetry. It is a sponge. This animal is placed in the phylum A) Ctenophora B) Cnidaria C) Porifera D) Platyhelminthes 3: The primary means of locomotion for mollusks is the A) mantle B) radula C) shell D) foot 4: In addition to asymmetry, what is another characteristic of sponges that distinguishes them from all other animals (Eumetazoa)? A) They do not acquire nutrition B) They do not reproduce sexually C) Lack of true tissues D) Autotrophy 5: Cnidarians usually exhibit one of two basic body forms: ______- are cylindrical and sessile (like sea anemones), while ______ are umbrella-shaped and free-living (like jellies) A) medusae: polyps B) medusae: amoebocytes C) choanocytes: polyps D) polyps: medusae 6: Jellies (jellyfish) are members of the class A) Turbellaria B) Scyphozoa C) Hydrozoa D) Anthozoa 7: Which of the following is NOT a general feature of animals? A) Multicellularity B) Active movement C) Heterotrophy D) Cell walls 8: Over evolutionary time, we first see a ------------- within the cnidarians, allowing for some basic coordination of these mobile animals. Flatworms later developed a ------ allowing for directionality of their movements. Finally, within the mollusks we see a -------- and a ----------, allowing for larger and more complex bodies not dependent on diffusion for nutrients. A) bilaterally symmetrical body: respiratory system: circulatory system; nervous system B) circulatory system; respiratory system; nervous system; bilaterally symmetrical body C) respiratory system; circulatory system; nervous system; bilaterally symmetrical body D) nervous system; bilaterally symmetrical body; circulatory system; respiratory system 9: Which of the following mollusks are correctly paired with their taxonomic class? A) Clams and oysters = Bivalvia B) Snails, slugs, and nudibranchs = Gastropoda C) Chitons = Polyplacophora D) Squids, nautiluses, and octopuses = Cephalopoda 10: What types of organisms are in the phylum Annelida? A) segmented worms (EARTHWORMS) B) Flatworms C) corals D) rotifers
Shaiju T.
QUESTION 55 Most mollusks have an open circulatory system, but some mollusks have a closed circulatory system, which is more efficient in delivering blood (oxygen) to body tissues. Which of the following does NOT have a closed circulatory system, but has an open circulatory system? A. squid B. octopus C. cuttlefish D. snail QUESTION 56 An example of an animal of the class Oligochaeta (Phylum Annelida) is the A. leech B. polychaete, which is very abundant in the ocean C. garden slug D. earthworm QUESTION 57 What is the excretory organ that is found in earthworms? A. flame cells B. nephridia C. Malpighian tubules D. tiny kidneys QUESTION 58 Snails have a "rasp-like" mouth that scrapes food into the digestive tract. This structure is called the A. radula B. planula C. gastrula D. lophophore QUESTION 59 A recognizable "clump" of nervous tissue that can be referred to as a brain first appears in which group of animals? A. clams B. snails C. sea cucumbers D. earthworms QUESTION 60 Arthropods have an exoskeleton made of this substance... A. silica B. collagen C. chitin D. cellulose QUESTION 61 Latrodectus hesperus is the scientific name for A. medical leech B. black widow spider C. termite D. common housefly QUESTION 62 This arthropod can produce cyanide gas as a defense mechanism. A. trap-door spider B. water flea C. aphid D. millipede QUESTION 63 What is the muscle that "curls" the abdomen of a crustacean, enabling it to swim, or rapidly flip itself backward out of reach of predators? (This is the big muscle that you eat when you eat lobster, or shrimp, or crayfish "tails") A. flexor muscle B. extensor muscle C. adductor muscle D. longitudinal muscle QUESTION 64 All of the following arthropods (insects) have wings except A. "true bugs" B. ants C. fleas D. praying mantis QUESTION 65 The three phyla (Ectoprocta, Brachiopoda, Phoronida) have which of the following features in common? A. lophophore B. nephridia C. radula D. setae QUESTION 66 Trochophores, the free-swimming larvae of many mollusks, are propelled through the water by A. flagella B. cilia C. flame cells D. nephridia QUESTION 67 Radula modification allowed all of the following functions in gastropods except A. scraping algae off rocks (and aquarium sides) B. eating vegetation (especially cutting off soft stems of plants at ground level) C. boring holes in other mollusk shells D. protecting themselves with stinging nematocysts QUESTION 68 Which of the following organs found in cephalopods (octopus) resemble those of the vertebrates? A. arms, tentacles B. functioning kidneys C. eyes D. digestive tissues, glands, and intestines QUESTION 69 Annelids possess all of the following except A. longitudinal and circular muscles for movement B. ganglia to respond to light, and to respond to other environmental cues C. setae in each body segment D. adductor muscles QUESTION 70 Which of the following Molluscan classes and their examples is mis-matched? A. Class Polyplacophora--example: chitons B. Class Gastropoda--example: garden slugs and snails C. Class Bivalvia--example: octopus and squid D. Class Cephalopoda--example: nautilus QUESTION 71 Suppose a marine biologist is conducting research on animals that have a lophophore and two calcified shells. Based on this information, this animal must belong to the phylum A. Brachiopoda B. Phoronida C. Ectoprocta D. Bryopoda QUESTION 72 Which class of arthropods contains members with two pairs of antennae, and legs on the thorax, and modified biramous "soft" legs on the ventral surface of the abdomen? A. Insecta B. Arachnida C. Chilopoda D. Crustacea QUESTION 73 The most successful class of Arthropods (being most numerous and occupying many different niches in nature) is the A. Arachnida B. Insecta C. Chilopoda D. Diplopoda QUESTION 74 Spiders lack jaws or mandibles, and are described as A. Agnatha B. Amandibulata C. blood suckers D. chelicerates
Josee P.
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