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Why are the intestines of many sea cucumbers and sea urchins greatly elongated compared to sea stars
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- Unlike the turbellarians earthworms have a complete digestive system. This means that; The earthworms do not have a typical stomach like other animals do The earthworms have a digestive system with only one opening The earthworms feed similar to fungi; by absorbing materials across the body wall The earthworm digestive system has both a mouth and an anusHow does the digestive system of a nematode or annelid differ from that of a flatworm? In what ways is the digestive system of an annelid worm more efficient than that a flatworm?"While the aminotic egg offers many advantageous, it also has limitations. Which of the following is a limitation of reproduction in amniotes? External fertilization is not possible in amniotes. Amniotic eggs must be laid in water or the embryos will dry out before hatching. Amniotes must be smaller than non amniotes at hatching because of the difficulty getting oxygen through the external membranes.
- What advantage does a digestive system with twoopenings have relative to digestive systems with only a single opening(like that of the flatworms)?Nutrition and Digestion Identify the different modes of feeding mechanisms found in the Animal Kingdom, describe each and give 2 example animals for each mode. Why do Cnidarians, Flatworms and Protists have simple or no extensively developed digestive system? (clue: mention their digestive structure and their mode of feeding) What are the structural adaptations of snakes that allowed them to eat and digest a whole prey? Why do insects of one species have a changing diet requirement during their life history? Different birds have varying food habits, discuss the structural and physiological adaptations that allow them to process these foods. What are the four stages of the digestive process, describe each stage/step and indicate what are the products/substances produced and their fate? Discuss the role of the endocrine system in controlling digestion. (no plagiarism pls, thank u!)What part of the earthworm's digestive system would you see in a cross-section anterior to the gizzard? the gut the sperm receptacles the crop the pharynx the oral cavity
- Which of the following sets of adaptations most likely describes an organism with a carnivorous diet? sharp teeth for biting and tearing, shortened intestines, a small cecum and appendix flat teeth for grinding, long intestines, enlarged cecum and appendix both sharp and flat teeth, medium length intestines, small cecum and appendixWhich of the following not only increases surface area for nutrient absorption, but also slows down passage of food through the digestive system to allow for a longer time for absorption? the glomerulus the endostyle the amphibian typhlosole the spiral valve the columella O the pneumatic ductYou are investigating a new kind of flatworm and give it food attached to charcoal pieces so that the digestive system can be seen under a microscope. When you look, you can see what you think is a mouth but cannot see an anus. What kind of digestive system would this worm have? -a hematocoel system -a closed digestive system -none of these choices are correct -an incomplete digestive system -radially symmetrical
- How does digestion in beings of the phylum Annelida work and which type of digestive system do they have?Is there any relationship among fish lice, bird lice, and land mammals, except that they are lice?Figure 27.9 Which of the following statements about diploblasts and triploblasts is false? Animals that display radial symmetry are diploblasts. Animals that display bilateral symmetry are triploblasts. The endoderm gives rise to the lining of the digestive tract and the respiratory tract. The mesoderm gives rise to the central nervous system.