MCQ
In a type of apomixis known as adventive embryony, embryos develop directly from the-
- ASynergids or antipodals in an embryo sac
- BNucellus or integuments
- CZygote
- DAccessory embryo sacs in the ovule
Explanation:
Apomixis does not involve gamete formation and fertilization as found in amphimixis.
Adventive embryo formation is a type of apomixis in which embryos are formed from diploid integumental or nucellar cells.
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| $(a)$ Bacillus thuringiensis | $(i)$ Cloning vector |
| $(b)$ Thermus aquaticus | $(ii)$ Construction of first $rDNA$ molecule |
| $(c)$ Agrobacterium tumefaciens | $(iii)$ $DNA$polymerase |
| $(d)$ Salmonella typhimurium | $(iv)$ Cry proteins |
Select the correct option from the following:
$(a)\quad(b)\quad(c)\quad(d)$