The function of the lac operon in E.coli is to normally block transcription of operon, but it stops functioning when lactose is present.
The brain stem is central trunk of the brain, consisting of the medulla oblongata, pons, and midbrain, which continues down into the spinal cord.
Gymnosperms have pollen but no flowers.
<h2>Answer:</h2>
The correct option is B which is micropyle.
<h3>Explanation:</h3>
- Generally micropyle is known as the opening in the ovule or egg from which sperm enters the egg.
- But at the time of germination it is used to absorb water and nutrients.
- It is the micropyle from which the root emerges from the seed.
