MCQ
Pollinia are sac like structures
- AWhich secrete yellow substance called pollen kit
- BWhich are found in megasporangia
- CIn which anther lobes are present
- ✓In which pollen grains are present in mass
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Choose the correct option $A$ and $B$
Choose the correct answer:
Statement $I$ : Bt toxins are insect group specific and coded by a gene cry $IAc$.
Statement $II$ : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic $\mathrm{pH}$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below: