Compound sieve plates are found in |
|||||||
a) |
Cucurbita |
b) |
Vitis |
c) |
Magnolia |
d) |
Corchorus |
Compound sieve plates are found in |
|||||||
a) |
Cucurbita |
b) |
Vitis |
c) |
Magnolia |
d) |
Corchorus |
(a) Compound sieve plate consists of several pore regions, which are separated by bars of wall thickening, e.g., Vitis. |
From evolutionary point of view, tracheids and sieve cells are more primitive than tracheae and sieve tubes respectively. The angiosperms have |
|||
a) |
Tracheae and sieve tubes |
b) |
Tracheids, tracheae and sieve tubes |
c) |
Tracheae, sieve cells and sieve tubes |
d) |
Tracheids, tracheae and sieve cells |
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