Question

Are all trees angiosperms?

Answer 1

Angiosperms are defined as the flowering plants which are the most diverse group of land plants and are heterosporous. They produce an ovule that consists of the female gametophytes in it.

Complete answer:
Trees that have broad leaves and change their colour are angiosperm trees which die every autumn. Coconut and Bay laurel are some of the angiosperm trees. Angiosperm consists of flowers and endosperm in their seeds which helps in the production of fruits that contain the seeds. The flowering organs have a specific breathing system that helps them to evolve more into different species without crossing back with related species. The stamens present in the angiosperm plants are lighter than other plants. The stamens are modified to resist self-fertilization. The development of the embryo takes place in the embryo sac and the wall of the sac is largest when the nucellus combines and forms integuments for the seed coat.
Angiosperm is composed of seven layers which consist of complexity e of tissue formation in flowering plants and the vascular bundles that are arranged to form concentric rings such as the xylem and phloem. The flowers show variations and provide external characteristics for the angiosperms species which ensure the fertilization of the ovule and development of fruits. Some flowers are hermaphrodite and have numerous morphological and physiological mechanisms for the prevention of self-fertilization. Angiosperm plays a vital role in agriculture and provides food products and a huge amount of livestock feed.

Note:
Crocus which is an angiosperm produces saffron and other varieties of angiosperms are used in the production of food products, floral perfumes and medicines. Orchid does not require soil for its growth and few flowers release a toxic substance that kills the plant.