Clams, octopuses, and snails are classified together in the same phylum, which is the phylum Mollusca. Are these animal groups also classified together in one kingdom?
A. Yes. All phylum members are classified together in the same kingdom.
B. No. Every phylum member is classified into a different kingdom.
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C. Maybe. Some but not all phylum members are classified in the same kingdom.
D. Maybe. Kingdom and phylum are separate and unrelated taxa.

A. Yes. All phylum members are classified together in the same kingdom

Explanation:

This because there are two broad classification of living organisms which are plants kingdom and animal kingdom which have several subdivisions under each. The phylum molluscs is under the animal kingdom because all the organism present under it are animals. The group consist of majorly eukaryotic, multicellular organisms that are heterotrophic in nature.

A chromosome is a packaged and organized structure containing most of the DNA of a living organism. Most prokaryotic cells have a set of chromosomes (46 in humans) with the genetic material spread among them.

During most of the duration of the cell cycle, a chromosome consists of one long double-helix DNA molecule (with associated proteins). During S phase, the chromosome gets replicated, resulting in an X-shaped structure called a meta phase chromosome. Both the original and the newly copied DNA are now called chromatic. The two "sister" chromatic are joined together at a protein junction called a cerement (forming the X-shaped structure).