The outer cell layer in sponges is Multiple Choice spongin. collagen. pinacoderm. mesohyl or mesenchyme.
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Sponges are simple aquatic animals that have a unique body structure, which includes different layers and types of cells. Show more…
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Question 7 (2 points) Reproductive unit of sponges that is a mass of archaeocytes surrounded by spicules and mesoglea. Question 7 options: Collar cells (choanocytes) Mesoglea Spicules Pinacocytes Archaeocytes (Amoebocytes) Gemmules Question 8 (2 points) Which class of sponges encompasses about 95% of all sponge species? Question 8 options: Sclerospongia Demospongiae Hexactinellida Calcarea Question 9 (2 points) Flagellated cells lining the pore of sponges; responsible for water movement and food capturing. Question 9 options: Collar cells (choanocytes) Mesoglea Spicules Archaeocytes (amoebocytes) Question 10 (2 points) A 1cm diameter, 10cm long Leuconia sponge can circulate ____ liters of water in 24 hours. Question 10 options: 15 liters 150 liters 1,500 liters 15,000 liters Question 11 (2 points) Which class of sponges encompasses the glass sponges? Question 11 options: Sclerospongia Demospongiae Hexactinellida Calcarea Question 12 (2 points) Specialized cells with subcellular organelle that fires a harpoon-like structure containing toxin. Used for defense and prey capturing by most Cnidaria. Also known as stinging cells. Question 12 options: Harpoon Filopodia Pseudopodia Nematocysts Question 13 (1 point) Which one of the following is NOT a characteristic of Ctenophora (comb-jellies)? Question 13 options: Bioluminescent Nematocysts (stinging cells) Transparent 8 plates of fused cilia for movement and food capturing Question 14 (2 points) Colonies of polyps that secrete CaCO3 covering, but do NOT have nematocysts in their tentacles. Question 14 options: Millipora (Fire corals) True corals Mnemiopsis (sea walnut) Cassiopeia Question 15 (2 points) Coral polyps are heterotrophic, capturing particles of organic matter with their tentacles. Question 15 options: True False Question 16 (2 points) Colonies of polyps that secrete CaCO3 covering and HAVE nematocysts in their tentacles. Question 16 options: Millipora (Fire corals) True corals Mnemiopsis (sea walnut) Cassiopeia
Shaiju T.
In sponges; cells differentiate into sperm or eggs in the Only are released into the water: mesohyl; spicules mesohyl; sperm cavity; sperm mesohyl: choanocytes cavity; choanocytes
Madhur L.
Spicules found in sponges are secreted by choanocytes. a) choanocytes b) porocytes c) amoeboid cells d) pinacoderm e) sperm cells
Adi S.
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