The phylum Mollusca includes the: Oyster, Clam, Snail,<span> chiton</span><span> O</span>ctopus<span>, and Squid</span>.<span> The main part of the body is enclosed in a fold of tissue called the mantle. They have bilateral symmetry. Many kinds of mollusks are covered by a shell.
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It began 3.5 billion years ago
Answer:
they are nursed by their mothers
Explanation:
Answer: T
Explanation:Carbon dioxide is added to the atmosphere naturally when organisms respire or decompose (decay), carbonate rocks are weathered, forest fires occur, and volcanoes erupt. Carbon dioxide is also added to the atmosphere through human activities, such as the burning of fossil fuels and forests and the production of cement.