Which is/are true of choanocytes of sponges: O produce spicules O produce sperm and eggs. trap organic/food particles. Allow sponges to move across the substrate. O pump water using a single flagellum.
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Q17: select all that apply
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- Which of the following is responsible for the process of filter feeding in a sponge? a. flame cells b. cnidocytes c. collar cells d. mesogleaWhich of the following in sponges form the outermost epithelium-like layer that is in contact with the external, aquatic environment? a. Pinacocytes and choanocytes b. Pinacocytes only c. Choanocytes and collencytes d. Pinacocytes and collencytes e. Choanocytes only f. Collencytes onlyRelative to asconoid organization in sponges the syconoid form exhibits smaller body size increased spongocel volume relative to pumping surface area reduced spongocel volume relative to pumping surface area larger body size
- These differ from the other classes of sponges in that their cells are syncytial (multinucleate and only a few cells or even one cell can cover the entire skeleton) Hexactinellida Calcerea Demospongia HomescleromorphaWhich of the following sponge body types would have the lowest amounts of gas exchange and feeding? Synconoid Asconoid Leuconoid_____________________________________ cells produce the water currents that carry food into a sponge
- Cells of a sponge that have cilia and direct water flow through the sponge are called_____. Question 15 options: a) Osculums b) Choanocytes c) Cnidocytes d) NematocystsThe function of the contractile vacuole in many freshwater protozoans is to: a) aid in mechanical digestionb) store carbon dioxidec) eliminate wastes such as ammoniad) eliminate excess waterMicorgnathozoans are characterized by (check all that apply) - dorsal plates - ventral plates - cellular epidermis - ciliary adhesive pad
- Alternate contractions of ______________muscles bend the body of a cephalochordate, propelling it through the water column. Group of answer choices longitudinal longitudinal and circular notochordal circular transverseIf a lung occurs in a snail, where would it be located? mantle cavity coelom incurrent siphon visceral mass excurrent siphon Which one of the following arthropods has biramous appendages? scorpion mite millipede lobster horseshoe crab pls help with these two questionsChoose three characteristics of an arthopod mantle longitudinal muscles only tagma close circulatory system radula incomplete digestive system open circulatory system exoskeleton protonephridia diffusion across the skin