MCQ
Polar nuclei are located in
- ✓Embryo sac
- BThalamus
- CPollen tube
- DOvule
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| Column $I$ | Column $II$ |
| $(a)\; XX-XO$ method of sex determination | $(i)$ Turner's syndrome |
| $(b)\; XX-XY$ method of sex determination | $(ii)$ Female heterogametic |
| $(c)$ Karyotype$-45 $ | $(iii)$ Grasshopper |
| $(d)\; ZW-ZZ$ method of sex determination | $(iv)$ Female homogametic |
Select the correct option from the following
$Y$ - The diversity of plants and animals is not uniform throughout the world but show a rather uneven distribution.
$Z$ - Species - area relationships was given by Alexander Von Humboldt.
$X -Y -Z$