Yes, cacti are dicots. Dicots, or dicotyledons, are a group of flowering plants whose seeds typically contain two embryonic leaves or cotyledons. Cacti belong to the family Cactaceae, which is part of the larger group of dicotyledonous plants.
One of the key characteristics of dicots is the presence of two seed leaves when the plant germinates. Cacti exhibit this trait, which places them firmly within the dicot category. Additionally, dicots often have other common features such as net-like leaf venation, flower parts in multiples of four or five, and a taproot system. While cacti have adapted to arid environments and may not display all typical dicot features, their seed structure confirms their classification as dicots.