Question

Which of the following trees/plants have enclosed seed in the fruit?
A. Angiosperm
B. Gymnosperm
C. Cryptogams
D. All the above

Answer 1

Hint: Phanerogams are the plants that bear seeds that contain embryo and stored food and have special structures for reproduction. This stored food is used during the germination of seed. Phanerogams are divided into gymnosperms and angiosperms.

Complete answer:
In gymnosperms are plants in which ovules are not enclosed by any ovary wall and remain exposed in both the condition before and after fertilization. The gymnosperm plants that develop post fertilization are naked, they are not covered. Few examples of gymnosperm are- Cycas, Pinus
The angiosperm are the flowering plants in which ovules and pollen grains are developed in the flowers. The seeds are enclosed in the flowers in angiosperms. Large group of plants are angiosperms which are in a wide range of habitats. Few examples of angiosperm are- Eucalyptus, wolffia.
Angiosperms are divided into two classes-
-Dicotyledons- have two cotyledons in their seeds
-Monocotyledons- only one cotyledon in their seeds.
Cryptogams are the plants in which reproductions are by their spores. Cryptogams do not have flowers or seeds. They are non-seed-bearing plants. Few examples of cryptogams are- bryophytes, lichens, algae, and ferns.
Bryophytes plants can live in soil but for sexual reproduction they are dependent on water, this is the reason bryophytes are also known as amphibians of the plant kingdom. Bryophytes reproduce by their spores not with their seeds. They do not have flowers. Bryophytes grow in the damp area such as moss and do not depend on root structures for nutrient uptake.
Pteridophytes are the first terrestrial plants to possess xylem and phloem. Flowers and seeds are absent in the pteridophytes and disperse spores. Pteridophytes are mainly used as a medicinal plant.
Angiosperms plants have enclosed seeds in the fruits. So, option A is the correct answer.

Note:
In pteridophytes most of the plants of similar kind are called homosporous. Some plants produce two kinds of spores small and large are called heterosporous.
The young embryo takes place in the female gametophytes, this process is known as seed habit and is the most important step in evolution.