Why aren’t sponges eaten more by predators?a. They are protected by silica spicules.b. They are protected by toxic defensive chemicals.c. They are eaten; it’s just that the leftover cells reaggregate into new,smaller sponges.d. a and b are correct.e. a, b, and c are correct
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Why aren’t sponges eaten more by predators?
a. They are protected by silica spicules.
b. They are protected by toxic defensive chemicals.
c. They are eaten; it’s just that the leftover cells reaggregate into new,
smaller sponges.
d. a and b are correct.
e. a, b, and c are correct
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- Flatworms can reach a maximum size of around 40cm. Whilst this is big for a worm, there are certainly larger animals on earth. What might it be that restricts the flatworms body size? A. They have an exoskeleton that restricts their growth. B. They do not have a circulatory system. C. They are exothermic animals that have limited energy for growth. D. They are acoelomates and so the growth of their internal organs is restricted by growth of the outer body wall.Which of the following results from sexual reproduction in sponges? a. Parenchymula b. Gemmule and parenchymula c. Parenchymula and external bud d. Gemmule e. Gemmule and external bud d. External budWhich of the following is responsible for the process of filter feeding in a sponge? a. flame cells b. cnidocytes c. collar cells d. mesoglea
- Which features are true of sea cucumbers? A. use the water vascular system to move on the seafloor and suction to mollusks to feed on B. have leathery skin, least like the other organisms in the phyla, long lanky body C. feed on algae, no true arms, have 5 layers of tube feet D. thrash arms around to move, feed using the water vascular system 8 Copyright © 2003-2022 International Academy of Science. All Rights Reserved. search O R. T. H 64°F Mostly cloudy A O LCorals belong to which of the following? a. comb jellies b. rotifers c. sponges d. None of these are correct. e. cnidariansWhich of these locomotor organs would likely be the shortest? a. a flagellum b. a cilium c. an extended pseudopod d. a pellicle
- Which statement about protists is true? a. Protists have many different metabolic lifestyles. b. Almost all protists are parasitic. c. All protists use pseudopods or cilia to locomote. d. All marine protists rid themselves of excess water by means of contractile vacuoles. e. Protists are found only in aquatic habitats.Based on the diagram, which of the following pairs of organisms have the closest evolutionary relationship? A. Radiolarians and Forams B. Diatoms and Euglenozoans C. Ciliates and Radiolarians D. Diplomonads and EuglenozoansWhich of the following is NOT true about the mesohyl? a. It is devoid of cells. b. Archaeocytes and other cells move about it. c. None among the other choices. d. It is a gelatinous extracellular matrix that forms a non-living middle layer in sponges. e. All of the other choices (except "None among...")
- "Stalked jellyfishes" belong to which class? A. Staurozoa B. Scyphozoa C. Anthozoa D.Hydrozoa E. CubozoaIn flatworms, flame cells are involved in what metabolic process?a. reproduction c. locomotionb. digestion d. osmoregulationWhich of the following conclusions is supported by the diagram and the data table? Number of cell types Platyhelminthes 30 Cnidaria 34 Nematoda 38 A. Platyhelminthes has the greatest complexity, and it is more closely related to Nematoda than to Cnidaria. B. Nematoda has the greatest complexity, and it is more closely related to Platyhelminthes than to Cnidaria. C. Cnidaria has the greatest complexity, and it is more closely related to Platyhelminthes than to Nematoda. D. The complexity is equal among all three groups, but Platyhelminthes is more closely related to Cnidaria than to Nematoda.