MCQ
Mature Polygonum type embryo sac has got
- ✓Seven cells and eight nuclei
- BSeven nuclei and eight cells
- CEight cells and eight nuclei
- DSeven cells and seven nuclei
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| Column $- I$ | Column $- II$ |
| $(1)$ Psilopsida | A. Sellaginella |
| $(2)$ Lycopsida | $(B)$ Adiantum |
| $(3)$ Sphenopsida | $(C)$ Equisetum |
| $(4)$ Pteropsida | $(D)$ Psilotum |
$II.$ Tracheids/vessels elements are larger during periods when water is abundant
$III.$ Tracheids/vessels elements have thicker wall during periods of water deprivation
$IV.$ Wood formed in the previous years is darker than newer wood
Select the combination of correct statements from the options given below
Reason : Distinctive morphological characters are displayed due to reproductive isolation.