It usually means that an organism has two different types, for example, males and females of some species look different, and are said to be sexually dimorphic. A dioecious plant has the male and female flowers on different plants. For example, date trees are dioecious. DIRT Dirt is another name for soil. Soil is a natural, constantly-changing substance that is made up of minerals, organic materials, and living organisms.
Plants grow in soil.
Seeds are dispersed by the winds and by animals. Some dispersers include birds, insects, bats, and furry animals like monkeys. The Dogger epoch was the middle part of the Jurassic period , about 180 to 159 million years ago. The dominant plant is the most adundant species in an area, for example, pine trees are dominant in a pine forest. A double compound leaf is a leaf in which each leaflet of a compound leaf is made up of secondary leaflets.