Bio tic Factors. An ecosystem is a community of organisms that interact with each other and with the and biotic factors in their environment. Abiotic factors are chemical and physical factors such as temperature, soil composition, and climate, along with the amount of sunlight, salinity, and pH.
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FaithRawlins14
Answer: The correct answer is-
A. organs, but no true body cavity.
Based on the presence of body cavity ( also called coelom), multicellular animals can be classified as acoelomates ( no true body cavity), coelomates ( having true body cavity), pseudocoelomates ( false body cavity).
Roundworms are pseudocoelomic. This means that organs are present but the body cavity is not lined by mesodermal epithelium.
Body cavity is present between the external wall of body and the intestine and it baths the different body organs.
Thus, option A) is the right answer.
I think the best way to remove mud from water is reverse osmosis. But if your're think about doing it by hand than I would boil the water so the mud collects on the bottom. Then I would put a plastic wrap on top of the container while a small cup is inside the bowl. And then put a rock on the plastic wrap in the center on top of cup.
Explanation: The water vapor rises because of vaporization, and then collects as condensation and drips into cup-collection as pure water
I got this from a lab i did before, so all credits don't go to me =><span />