Top 500 General Science GK Questions

Fish gills are organs that allow fish to breathe underwater. Most fish exchange gases like oxygen and carbon dioxide using gills that are protected under gill covers (operculum) on both sides of the pharynx (throat). Gills are tissues that are like short threads, protein structures called filaments.

Except tomato, all others are grown under the ground. Potato, onion, carrot are root vegetable. Whereas, Tomato is grown above ground. Hence, Tomato is the correct answer.

Baking soda and baking powder help in baking bread. The microbe responsible for baking bread is a fungus named Saccharomyces cerevisiae for this reason it is also called baker's yeast. Hence, from the above-mentioned points, it becomes clear that bacteria are not used in the baking of bread.

The sperm. The sperm is the male reproductive cell. Its role is to fertilise an egg. It contains the man's genetic material.

Prolactin is necessary for the secretion of milk by the cells of the alveoli. The level of prolactin in the blood increases markedly during pregnancy, and stimulates the growth and development of the mammary tissue, in preparation for the production of milk (19).

Colostrum is the first form of breastmilk that is released by the mammary glands after giving birth. It's nutrient-dense and high in antibodies and antioxidants to build a newborn baby's immune system. It changes to breast milk within two to four days after your baby is born.

The development of the child inside the mother's body takes approximately eleven months.

During sexual reproduction, two haploid gametes combine into one diploid cell known as a zygote in a process called fertilization. The nuclei from the gametes fuse, and each gamete contributes half of the genetic material of the zygote.

Each egg cell or sperm contains 23 chromosome whereas a normal cell has 46 chromosomes.