Which phylum of the gymnosperms includes only a single living species

The gymnosperms phylum which includes only one living species is:

Ginkgophyta only one type survives  Ginkgo biloba.

Plants are divided into two, namely vascular plants and vascular plants. Examples of vascular plants are moss, whereas vascular plants consist of seedless plants, which are nails and seed plants. While seed plants themselves are divided into closed seed plants (angiosperms) and open seed plants (gymnosperms).

Seed plants are grouped into two subdivisions, namely open seed plants (Gymnosperms) and closed seed plants (Angiosperms). Gymnosperms are plants that have open seeds. They are a group of seed plants whose seeds are not protected in ovaries.  

Gymnosperms consist of several divisions, both extinct and extant, which include 3 divisions that have become extinct and 4 divisions that still survive.

The first extinct Gymnosperms plants include the following which encompasses 3 extinct divisions:

- Bennetophyta

- Cordaitophyta

- Pteridospermophyta, extinct but considered to be the ancestor of Angiospermae.

The second is the Gymnosperms plant that still exists today, which includes four Gymnosperms divisions, including the following:

1) Coniferophyta or can be called Pinophyta

It is a conifers.

2) Gnetophyta

With only 3 members of the genus: Gnetum, Welwitschia, and Ephedra.

3) Cycadophyta

Cycadophyta is divided into two families, namely Cycadaceae and Zamiaceae.

4) Ginkgophyta

Only one type remains: Ginkgo biloba

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phylum of the gymnosperms ,

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Class: High School

Subject: Biology

Keyword: Phylum of the gymnosperms.

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

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