Question:

Do the arms of a cactus signify how old it is?

Answer:

Some cacti arms become more dense with age and some get rings that show age. Others flower from an early age. AnswerParty!

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cactus Eudicots Caryophyllales Cacti Opuntia

In graph theory, a cactus (sometimes called a cactus tree) is a connected graph in which any two simple cycles have at most one vertex in common. Equivalently, every edge in such a graph belongs to at most one simple cycle. Equivalently, every block (maximal subgraph without a cut-vertex) is an edge or a cycle.

Cacti are outerplanar graphs. Every pseudotree is a cactus. A graph is a cactus if and only if every block is either a simple cycle or a single edge.

A social issue (also called a social problem or a social situation) is an issue that relates to society's perception of a person's personal lives. Different cultures have different perceptions and what may be "normal" behavior in one society may be a significant social issue in another society. Social issues are distinguished from economic issues. Some issues have both social and economic aspects, such as immigration. There are also issues that don't fall into either category, such as wars.

Thomas Paine, in Rights of Man and Common Sense, addresses man's duty to "allow the same rights to others as we allow ourselves". The failure to do so causes the birth of a social issue.

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