kahekruvilised

Kahekruvilised, also known as dicotyledons, are a group of flowering plants that are characterized by their two seed leaves, or cotyledons, which are present in the embryo of the seed. This distinguishes them from monocotyledons, which have only one cotyledon. The term "dicotyledon" comes from the Greek words "di," meaning two, and "kotyledon," meaning seed leaf.

Dicotyledons are one of the two major groups of flowering plants, the other being monocotyledons. They are further divided into two subclasses: Rosidae and Asteridae. The Rosidae subclass includes plants with a pentamerous (five-parted) flower structure, such as roses and apples. The Asteridae subclass includes plants with a trimerous (three-parted) flower structure, such as sunflowers and daisies.

Dicotyledons are widespread and diverse, with over 170,000 known species. They include many economically important plants, such as fruits, vegetables, and ornamental plants. They also play a crucial role in ecosystems, providing food and habitat for many animals.

The study of dicotyledons is an active area of research in botany, with scientists studying their evolution, taxonomy, and biology. They are also of interest to agricultural scientists, who study their genetics and breeding to improve crop yields and quality.