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Answer:
The correct answer is a mantle.
Explanation:
A mantle refers to an essential component of the body of molluscs. It refers to a delicate covering produced from the body wall that at certain occasions get strengthened by calcium carbonate.
In various species of molluscs, the epidermis of the mantle discharges calcium carbonate and produces a shell over the entire body. The mantle encloses the stomach, heart, gonads, and intestines of the molluscs.
Answer: c.The process of programmed cell death.
Explanation:
Apoptosis is a kind of programmed cell death process. This can be seen in multicellular organisms. This involves the biochemical changes in the body of the organism which lead to death of cells. The changes associated in the cell during this condition includes the cell shrinkage, blebbing, condensation of the chromatin, nuclear fragmentation, decay in mRNA, and DNA fragmentation.
Answer: Metamorphic rocks will be exposed to weathering and can break down into sediment and then be compressed to form sedimentary rocks.
Explanation:
