
Give an example of a plant which bears naked seeds.
Answer
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Hint: Gymnosperms are seed producing plants with unclosed seed, i.e, their seeds are open without any protection. Gymnosperms have naked seeds which results in the lack of an ovary as the seeds are not contained in a fruit.
Complete Answer:
The seeds of gymnosperms usually develop at the surface of
leaves or form cones. The largest gymnosperms are known to be conifers. Other large
gymnosperms include cycads and gnetophyte.
There are over 1000 gymnosperm species that presently exist on Earth.
Conifers are the most abundant gymnosperms with almost 70 genera and almost 630
species. They are woody and mostly evergreen. Coniferous leaves are long, needle-like and
thin. Other gymnosperm species have flat and triangular scale-like leaves.
Cycads have 11 genera and almost 340 species. They are usually found in tropical climates
and are most abundant in the equatorial region.
Gymnosperms are economically useful. They are used in the production of lumber, paper
and resin. Some gymnosperms are used in the manufacturing of soap, varnish, perfumes
and nail polish.
Note:
It has been speculated by many researchers that gymnosperms developed on Earth around the Carboniferous period. Gymnosperms replaced the lycopsid rainforests in the tropical region in the Carboniferous period. The development of gymnosperms originated from a genome duplication event that occurred about 320 million years ago.
Gymnosperms lack an outer covering or shell around their seeds.
They do not produce flowers.
They do not produce any fruits.
Complete Answer:
The seeds of gymnosperms usually develop at the surface of
leaves or form cones. The largest gymnosperms are known to be conifers. Other large
gymnosperms include cycads and gnetophyte.
There are over 1000 gymnosperm species that presently exist on Earth.
Conifers are the most abundant gymnosperms with almost 70 genera and almost 630
species. They are woody and mostly evergreen. Coniferous leaves are long, needle-like and
thin. Other gymnosperm species have flat and triangular scale-like leaves.
Cycads have 11 genera and almost 340 species. They are usually found in tropical climates
and are most abundant in the equatorial region.
Gymnosperms are economically useful. They are used in the production of lumber, paper
and resin. Some gymnosperms are used in the manufacturing of soap, varnish, perfumes
and nail polish.
Note:
It has been speculated by many researchers that gymnosperms developed on Earth around the Carboniferous period. Gymnosperms replaced the lycopsid rainforests in the tropical region in the Carboniferous period. The development of gymnosperms originated from a genome duplication event that occurred about 320 million years ago.
Gymnosperms lack an outer covering or shell around their seeds.
They do not produce flowers.
They do not produce any fruits.
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