and write clearly. If yout answer is 3 or more letters off then it n wrons your

Question

and write clearly. If yout answer is 3 or more letters off then it n wrons your name iven area will not be graded. No exceptions. xarm, Failure to do so will result in lost points Writs only in the space small organs of equilibrium in scyphozoan jellyfishes are called provided Answars wniten borne in more complex sense organs called rhopalium.(2 pts) 22. Since flatworms and ribbon worms lack a coelom or a pueudocoel, they scoelamate animals. (2 ps) of Eish Most monogeneans are external parasites 2 pts) 24. Polychaetes crawl by means of leg-like which also serve in respiration. 12 pts gathering. (2 pts) organs are ciliated s sensory pits or slits that appear to be chemoreceptive for food 6. The anterior-most and posterior most portions of the annelid body are the prcstmium respectively. (2 pts) and pygidium, The tongue-like, rasping organ in the head of many moluscs is the Footr rada Differentiation of a head end (found mainly in bilaterally symmetrical animals) is called 2 Pts) (2 pts) 9. Sponge beds have been heavily "fished" for bath sponges and in other cases pollution or an imbalance in organisms has deyastated other sponge beds. what is the likely overall consequence of this in the ocean environment?pts) sms wiut lose habitats or means of protection, as many sPonges are US by oher organ Sms g some species ot Crab. 10. Why does the wound from the bite of a leech bleed profusely? (2 pts) coaqulate wnich prevents Because their Saliva contains an antri- ciotting of rhc btoad 11. Using the concepts of evoliutionary development, explain how we get variation within a species. (5 pts) For evolutron to occur, there needs to be randonm others and their carriers will bive on to mate, atosin loetter than for varted genotypes. There atso needs to be speafe genes expressed, those exprsse nes cn aiso be as the veried genctypes moy be expressed dfferent Coral reefs generally are limited in gedgraphic distribution to shallow marine waters. How do you explain this obse la be found in more Shalous wat ers where foundl (2 pts) Since corals need Suntight ard nutrient rich waters to ilter feed in, ulation Coraus will qenera those things arr things are more abunclant. Their means of osnioreg e in marine habtats

Explanation / Answer

Since you have asked for some specific questions, I am going to answer first three out of them. I hope it helps. Thanks

5. Nuchal (A nuchal organ is a ciliated pit or groove present at the posterior end of the prostomium of annelid worms, some cephalopods, and other invertebrates. They are used for food gathering.)

7. Radula( It is used for scraping food particles off a surface and drawing them into the mouth)

8. Cephalization (It is defined as an evolutionary trend in which, over many generations, the mouth, sense organs, and nerve ganglia become concentrated at the front end of an animal, producing a head region).

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