The biologist should check the female structures of the plant, if the egg is enclosed in a protective structure.
Seed plants come under the sub-division Spermatophytes. They usually have a special structure that produce the male and female gametes. The gametes undergo a process called fertilization, forming an embryo enclosed inside a seed. Depending on the nature of the seed, seed bearing plants can be classified into angiosperms and gymnosperms.
Gymnosperms have exposed seeds. They bear their seeds on special structures called cones. After fertilization, the seeds are produced on the cone, after which it gets carried away by wind or animals.
Angiosperms bear their seeds on special reproductive structures called flowers. The male gamete called pollen can be produced on the same or a different flower. It fertilizes the female gamete in the ovule, where it forms the seed. After fertilization, the rest of the flower forms a protective covering for the seed called a fruit.
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