Consider statements about human skin: 1. The epidermis is the outermost layer. 2. Sweat glands help in thermoregulation. 3. Melanin protects against UV radiation. Which are correct? MCQ with Answer and Explanation

Explanation:
In gymnosperms like Pinus, the female gametophyte develops within the ovule and serves as the nutritive tissue for the developing embryo. Unlike angiosperms, where the nutritive tissue is the triploid endosperm formed after double fertilization, the gymnosperm nutritive tissue is haploid and forms before fertilization. Therefore, the edible part of a pine seed is the haploid female gametophyte.

Explanation:
Gregor Mendel, an Austrian monk, is known as the 'father of genetics' for his pioneering experiments on inheritance in the garden pea plant (Pisum sativum) between 1856 and 1863. He studied seven pairs of contrasting traits and formulated the fundamental laws of inheritance: the Law of Segregation and the Law of Independent Assortment, which form the basis of classical genetics.

Explanation:
In plant cells, which have rigid cell walls, cytokinesis occurs by the formation of a new cell wall (cell plate) in the middle of the cell. Mitosis is equational division occurring in somatic cells for growth and repair, maintaining the same chromosome number. Meiosis is reductional division, halving the chromosome number to produce gametes. Thus, statements 1 and 3 are correct.