MCQ
Adventitive polyembryony/ from nucellar cells occur in.
- APoa
- BBrassica
- CAllium
- DCitrus
Explanation:
Polyembryony is the occurrence of more than one embryo in a single seed.
In adventive polyembryony, there is the formation of extra embryos due to sporophytic budding.
One or more sporophytic cells, either nucellus or integuments undergo stages of embryogeny and eventually develop into mature embryos.
This kind of polyembryony is found in citrus fruits.
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| Column $- I$ | Column $- II$ |
| $(1)$ Inheritance of two genes | $(a)\; ABO$ blood group |
| $(2)$ Incomplete dominance | $(b)\; 1:2:1$ |
| $(3)$ Codominance | $(c)\;9:3:3:1$ |
| $(4)$ Inheritance of one gene | $(d)\; 3:1$ |
$I.$ Sweet potato
$II.$ Potato
$III.$ Filippers of penguins and dolphins
$IV.$ Hearts of different vertebrate
$V.$ Forelimbs of whales, bat and cheetah
The correct option is
Reason : Finally, the death rate increases than the birth rate.