Top 100 Biology GK Questions

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.

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

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.

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).

The correct answer is Cervix. Cervix is not a component of the human male reproductive system. Cervix facilitates the passage of sperm into the uterine cavity.

Some plants like potato, turmeric, garlic, ginger and sugarcane store food material in the stem due to which the stem bulges in size. Hence, these plants are categorized as plants with modified stems.

In the fruit of pomegranate, the seed coat is the edible part. This seed coat is modified and has fleshy testa which is juicy and can be eaten. In pomegranate fruit, the outer hard layer is made up of exocarp and also mesocarp partially, as it is also associated with the formation of septa in the fruit.

At the same time, plant transpiration provides evaporative cooling, forming a major component of the leaf energy balance. Transpiration also provides the driving force for transport of water and nutrients from roots to shoots.

1. Nyctalopia (night blindness) is caused by deficiency of Vitamin A.

2. Foods rich in Vitamin A are carrots, spinach, sweet potatoes, lettuce, etc.

3. Vitamin A deficiency can cause damage to rod cells, which reduces the ability to see in low light.

Turmeric is the underground stem of a ginger-like plant (rhizome).