Consider statements about biotechnology: 1. Bt cotton is resistant to insects. 2. Golden rice is enriched with Vitamin A. 3. Cloning produces genetically diverse offspring. Which are correct? MCQ with Answer and Explanation

Explanation:
Frederick Griffith in 1928 demonstrated the transformation of non-virulent pneumococci to virulent by heat-killed virulent strain, suggesting a transforming principle. Avery et al. later identified it as DNA. Hershey-Chase confirmed DNA is genetic material.

Explanation:
Apiculture involves the maintenance of honeybee colonies for honey, beeswax, and pollination services. Sericulture is silkworm rearing, pisciculture is fish farming, poultry is bird rearing for eggs/meat. The most common species in India is Apis indica (Indian bee) and Apis mellifera (European bee). Apiculture requires knowledge of bee biology, management of hives, and disease control.

Explanation:
The root cap is a thimble-like mass of parenchyma cells covering the apical meristem, protecting it as the root pushes through the soil. It also secretes mucilage to ease passage. Cells are constantly sloughed off and replaced. The meristematic zone is where cells divide.