9-11-12 please Very briefly if possible thanks 9. Sponge beds have been heavily

Question

9-11-12 please Very briefly if possible thanks 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? (3 pts) sms wiul tose nabitats or means of prorection, as many spenges are by other organisms elter ora even a means ot canolaue by some spes crab. 10. Why does the wound from the bite of a leech bleed profusely? (2 pts) Because theur saliva contains an ant- late which prevenrs ciotting of the blosc For evolution to occur, tmere neds to be random wiesto dl if ther is random mating those expressed genes can ausa be 11. Using the concepts of evolutionary development, explain how we get variation within a species. (5 pts) 36me trai perform better than others and their carriers uwill uve n to wate, al esi for varied genotypes. There also needs +oe speake genes expressed d as the veried genctypes may be expressecd different Coral reefs generally are limited in geögraphic distribution to shallow marine waters. How do you explain this observation? (2 pts) Since corais meed suntight ard nutrient rich waters to filter-feed in a be found in more Shallo wat ers where eans of ostorequetion y founc Cordus will qunerat means of osnoreg things are more abunclant. Their o cannot fane non-Sa nated water, So they are on

Explanation / Answer

9. Sponges are the organisms that are very delicate. Devastation of sponge bed lead to the lose the filtering system of the ocean and lead to the death of many organisms because they depend rely on the sponges for their food.

11. Variation is an important factor and responsible for variation within the species. These variation are too known as micro-evolution. These variation are due to genetic difference and environmental factors.

12. Coral Reef have mutual association with algae that live in their tissues known as zooxanthellae. This algae are essential to reef-building corals living and present to a depth of 30m. Hence, coral reef are limited in geographic distribution.

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