The correct answer is 2. By a feedback loop.
Hormone levels in the body is regulated by negative feedback mechanism. In this mechanism, a stimulus stimulates the release of a substances. After the effect of that substance its further release is inhibited. This can be understood by an example, the anterior pituitary gland stimulate the thyroid gland to release thyroxin and on increasing the thyroxin in the blood, feedback the hypothalamus and anterior pituitary to inhibit further release of thyroxin from thyroid gland.
The apical meristem, also known as the "growing tip," is an undifferentiatedmeristematic tissue<span> found in the buds and growing tips of roots in plants . Its main</span>function<span> is to trigger the growth of new cells in young seedlings at the tips of roots and shoots and forming buds.</span>
D. Mitosis, During<span> the mitotic phase, the duplicated chromosomes are segregated ... reserves to </span>complete<span> the </span>task<span> of replicating each chromosome in the nucleus</span>
Most likely the offspring would be short stem. One parent has a dominant allele for long stem and a recessive allele for short stem and the other has two recessive short stem alleles, making the percentages 25% for tall stem and 75% chance of being a short stem plant.
In the DNA, that is why they are called the building blocks of life.
