1. Tardigrade
  2. Question
  3. Biology
  4. Which of the following plants are categorized in living fossils? <table class=MsoTableGrid style=border-collapse:collapse; border:solid windowtext 1.0pt> <tr style=height:12.6pt> <td style=border:solid windowtext 1.0pt; width:106.55pt; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (i) Gnetum <td style=border:solid windowtext 1.0pt; width:106.55pt; border-left:none; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (ii) Ephedra <tr style=height:12.6pt> <td style=border:solid windowtext 1.0pt; width:106.55pt; border-top:none; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (iii) Cycas <td style=border-bottom:solid windowtext 1.0pt; width:106.55pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (iv) Pinus <tr style=height:12.6pt> <td style=border:solid windowtext 1.0pt; width:106.55pt; border-top:none; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (v) Ginkgo biloba <td style=border-bottom:solid windowtext 1.0pt; width:106.55pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (vi) Zamia pygmaea <tr style=height:12.1pt> <td style=border:solid windowtext 1.0pt; width:106.55pt; border-top:none; padding:0in 5.4pt 0in 5.4pt; height:12.1pt valign=top width=142> (vii) Cedrus <td style=border-bottom:solid windowtext 1.0pt; width:106.55pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:12.1pt valign=top width=142> (viii) Picea <tr style=height:12.6pt> <td style=border:solid windowtext 1.0pt; width:106.55pt; border-top:none; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (ix) Abies <td style=border-bottom:solid windowtext 1.0pt; width:106.55pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0in 5.4pt 0in 5.4pt; height:12.6pt valign=top width=142> (x) Junipers

Q. Which of the following plants are categorized in living fossils?
(i) Gnetum
(ii) Ephedra
(iii) Cycas
(iv) Pinus
(v) Ginkgo biloba
(vi) Zamia pygmaea
(vii) Cedrus
(viii) Picea
(ix) Abies
(x) Junipers

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Solution:

(iii) and (v)
A "living fossil" may be defined as a plant that lived during ancient times and still survives on earth today. These are living representatives of primitive spore-bearing and seed-bearing plants that once flourished on earth in very different floras where dinosaurs roamed the land.