The ability of solid rock to flow is called Plasticity.
The answer is 2. This is why their autosomal cells are referred to as diploid in chromosome number. The gametes have only one set of chromosomes. The homologous pair (sister chromosome) separate during meiosis I. If there was an extra chromosome in addition to this set then this would cause a condition called aneuploidy.
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When you cut down a tree, there are rings on the inside of the tree. You can count these lines to help determine how old the tree is.