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3 years ago

The ____ phylum of seedless vascular plants has about 1000 known living species, including those in the genera

Biology

2 answers:

Alisiya [41]3 years ago

5 0

Answer: Lycophyta

Explanation:

It is one of the primitive vascular plant that is club of mosses and their living fossil. These plant species are group in 6 genera.

Huperzia, Lycopodium, Lycopodiella, Selaginella( spike moss) are some of the genera of this phylum.

This phylum has more than 1200 species of the plants which is is widely distributed in the tropics. These plants depends on the mycorrhizae for obtaining nutrition as they lack the ability of photosynthesis.

dalvyx [7]3 years ago

3 0

Answer:

D)Lycophyta

Explanation:

The seedless vascular plants or the pteridophyte forms one phylum of the plant kingdom. The pteridophyte kingdom can be classified into three groups: the Sphenophytes, the pteridophytes and the Lycophytes.

The Lycophyte group contains about 1000 living species as it is the most primitive group of vascular plants. The species is characterised by the presence of the microphyll like the Selaginella and Lycopodium.

The rhizoids of the gametophyte of these plants form the mycorrhizal association with the fungi.

Thus, Option-D is the correct answer.

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Extra credit question

Earth is special because it is an ocean planet. Water covers 70 percent of Earth's surface. Earth's atmosphere is made mostly of nitrogen and has plenty of oxygen for us to breathe.There are multiple reasons for earth to be a special planet. Reasons are as follows

1.Earth is the only planet known where intelligent life exist.

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3. Earth has a unique magnetic field which protects the earth from the harmful solar winds. These solar winds played a role in transforming venus into hell.

4. Earth has Van Allen radiation belts which protects it from cosmic rays.

5. Our large neighbour Jupiter protects is from many comets and asteroids that come from the keiper belt and Oort cloud.

6. Earth's atmosphere is favorable to support life on earth. This atmosphere consists of different gases in adequate amount. If the percentage of gases would differ then life on earth may face serious consequences.

7. Tectonic plates of earth differentiates it from most other planets.

8. Earth has a solid crust unlike the gaseous planets.

9. Earth has been gifted with a medium sized star which release solar winds and protect us from the harmful radiation of outer space.

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