Which of the following are called vascular cryptogams? |
|||||||
a) |
Pteridophytes |
b) |
Bryophytes |
c) |
Gymnosperms |
d) |
Algae |
Which of the following are called vascular cryptogams? |
|||||||
a) |
Pteridophytes |
b) |
Bryophytes |
c) |
Gymnosperms |
d) |
Algae |
(a) The pteridophytes are flowerless, seedless, spore producing vascular plants which have successfully invaded the land. These are called vascular cryptogams because among cryptogams the vascular strands are present only in pteridophytes. |
What are the narrow extensions of the pulp cavity? |
|||||||
a) |
Pulp |
b) |
Dentine |
c) |
Root canals |
d) |
Periodontal ligament |
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