Consider statements about the nucleus: 1. It is bounded by a single membrane. 2. It contains the nucleolus. 3. Nuclear pores allow RNA export. Which are correct? MCQ with Answer and Explanation

Explanation:
Imbibition is a physical process where solid, hydrophilic (water-loving) colloidal materials (like cellulose, pectin, proteins, and starch) adsorb water, causing a tremendous increase in their volume and generating significant imbibitional pressure. This process is the very first step in seed germination. When a dry seed is exposed to water, its cell walls and storage materials imbibe water, causing the seed to swell, rupturing the seed coat, and initiating the metabolic activities required for the seedling to grow. It is also responsible for the splitting of rocks by plant roots.

Explanation:
Ovaries are the primary female gonads that produce ova (eggs) and secrete sex hormones estrogen and progesterone. The uterus supports embryo development, the fallopian tubes transport eggs, the vagina is the birth canal.

Explanation:
Coal is a fossil fuel formed over millions of years and is finite, thus non-renewable. Solar, wind, and tidal energy are renewable and replenishable. Non-renewable resources include coal, petroleum, natural gas, and nuclear minerals. Overexploitation leads to depletion and environmental pollution. Conservation of such resources is essential for sustainable development.