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- Archaeocytes are associated witha. digestion in bacteria.b. the digestive tracts of sponges.c. the filter organs of continuous feeders.d. the human appendix.e. the ingestion and distribution of food in sponges.1. State the function of the following parts of the genus Romalea (grasshopper): antenna, tympanum, spiracles, ovipositor (female), gastric caeca, malphigian tubules, tracheae, air sacs What are the hairlike appendages called that anchor into the skin of annelids? What structures do earthworms have to help dispose of nitrogenous wastes? Briefly describe how earthworms reproduce and what structures are involved.Figure 28.45 Which of the following statements about insects is false? Insects have both dorsal and ventral blood vessels. Insects have spiracles, openings that allow air to enter. The trachea is part of the digestive system. Insects have a developed digestive system with a mouth, crop, and intestine.
- Figure 28.21 Which of the following statements about the anatomy of a mollusk is false? Mollusks have a radula for grinding food. A digestive gland is connected to the stomach. The tissue beneath the shell is called the mantle. The digestive system includes a gizzard, a stomach, a digestive gland, and the intestine.Cnidocytes are found in phylum Porifera phylum Nemertea phylum Nematoda phylum CnidariaWhat type of symmetry is seen in the roundworm? Does it exhibit cephalization? Ascaris is a parasite that swims constantly in human intestines. What structure protects the nematode from being digested? View the Trichinella slide. Trichinella is also a parasite. It can infect humans as well as other mammals like pigs, bears, and rodents. If untreated, it can lead to death.What mammal tissue does this roundworm infect?Draw a picture below of the Trichinella as viewed under the microscope. Although not mentioned on the website, if available view the live vinegar eel specimens. If there are no live specimens available, check out this you tube video instead: https://www.youtube.com/watch?v=UnjwvtFvyeQDescribe the movement of the vinegar eels.Do they have a complete or incomplete digestive system?
- Segmentation in the earthworm is not exemplified bya. body rings.b. coelom divided by septae.c. setae on most segments.d. nephridia interior in most segments.e. tympanum exterior to segments.How do body structures and functions of a flatworm compare with those of a cnidarian for a. sensory responses to the environment? b. arrangement of the nervous system? c. obtaining food? d. movement? e. excretion of body wastes?11) Turbellarians are free-living worms in Phylum Platyhelminthes. They have a thin, very flat body form. Their body has to be flat because Group of answer choices they need to be able to expand their body when they breathe they need space for their notochord they rely on diffusion across their body wall for gas exchange they do not exhibit any cephalization so this makes them more efficient they have an exoskeleton and they would be too heavy to move if they weren't flat
- Topic: Earthworms 1. What is the function of the setae? 2. What is the function of the openings at segment number 14?Turbellaria are flatworms that have most of their body filled with: O a. Alarge complex reproductive system. O b. Branching digestive system. O c. Excretory system. O d. Muscles for swimming. e. Extensive respiratory system.when observing earthworms, while they move, can you easily distinguish the anterior from the posterior end? Yes, you can! If they are not moving, can you see any distinguishing feature in the body segments that may enable you to identify the anterior from the posterior?