Which of the following organisms exhibits cephalization? a. snail b. sea anemone

Question

Which of the following organisms exhibits cephalization? a. snail b. sea anemone c. sea star d. sponge e. Trichoplax The most successful of the invertebrate phyla with respect to the numbers of species is a. Annelida. b. Arthropoda. c. Mollusca. d. Echinodermata. e. Nematoda. Which of the following is mismatched? a. insects: exoskeleton b. tapeworms: proglottids c. flatworms: bilateral symmetry d. roundworms: incomplete digestive system e. rotifers: false coelom Earthworms perform all EXCEPT which of the following? a. chewing of food b. respiration c. tillage of the soil d. movement using setae e. excretion of water A feature found only in echinoderms is the a. radula. b. water-vascular system. c. nephridium. d. nematocyst. e. mandible. Which of these is NOT a crustacean? a. copepod b. horseshoe crab c. pill bug d. barnacle c. shrimp Tissues derived from mesoderm are absent in a. sponges. b. cnidarians. c. flatworms. d. sponges and cnidarians. e. sponges, cnidarians, and flatworms. Which of the following is a deuterostome? a. bird b. squid c. fly d. earthworm e. centipede Sponges live in a. shallow tropical seas. b. fresh water. c. cold, Antarctic seas. d. deep-sea trenches. e. all of these Which of the following are deuterostomes? a. annelids b. chordates c. arthropods d. mollusks e. all of these Which of the following are deuterostomes? a. annelids b. chordates c. arthropods d. mollusks e. all of these Which of the following is true of deuterostomes? a. The first opening into the embryo becomes the anus. b. The coelom arises differently than in protostomes. c. They include the echinoderms and chordates. d. The blastopore becomes the posterior opening to the gut. e. All of these are true. Hookworms, pinworms, and guinea worms are a. roundworms b. flatworms. c. annelids. d. circular worms. e. flukes. A radula is which of the following? a. foot b. feeding organ c. car d. sensitive hair e. balance organ Which annelid structure resembles the ancestral structure from which the vertebrate kidney evolved? a. trachea b. nephridium c. mantle d. parapods. e. all of these A major trend in the evolution of animals includes a. cephalization. b. the development of types of symmetry c. variation in coelomic cavities. d. the development of segments. e. all of these

Explanation / Answer

53. A. Snail

Cephalization is considered an evolutionary trend, whereby nervous tissue, over many generations, becomes concentrated toward one end of an organism. This process eventually produces a head region with sensory organs.

54. The most successful of the invertebrate phyla with the respect to the numbers of species is Arthopodia

55.

56. Earthworms can perform all but which of the following?
a. chewing of food

57.  One characteristic that is found only in echinoderms is
b. a water-vascular system.

58. Which of the following invertebrates is not a crustacean?

Horseshoe crab

59. Mesodermal tissue is absent in
a. sponges.

60. All options are correct (Plz check this)

61. (e.)

Sponges live in all types of regions all over the region. They are able to thrive in most environments. 99% of all sponges live in marine water, but some sponges made of spongin fiberlive in freshwater.

62. (e)

63. (e)

64. Hook worms, pin worms, and guinea worms are? Round worms

65. A radula is which of the following?
B. feeding organ

66. Which annelid structure may resemble the ancestral structure from which the vertebrate kidney evolved

Nephridium

67. (e)

68. poriferans are herbivores

69. Which of the following is NOT an organ for excreting excess water from the body?
c. trachea

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