The seed is protected by a seed coat. There are two seed leaves inside the diocotyledon seed. The seed leaves nourish the plant after it germinates. Germinating dicotyledon plants all look very similar to this picture when they first begin to grow. The two seed leaves open and the shoot of the plant's characteristic leaves grows up between them.
Dicotyledon leaves are net-veined.
Study the pictures of the yellow primroses here to see how their leaves have veins that go down the leaves and also across them. The flowers of dicotyledons have petals and other flower parts arranged in fours and fives, or in multiples of four and five. Roses have five petals. Cherry blossoms have five petals. Our fruit trees and deciduous trees are dicotyledons, as are many shrubs and flowers.