Biology Quiz 7

Commercially important cotton fibres are epidermal hairs of seeds. The cotton is found to grow around the seed coat of the cotton (Gossypium) plant.

Men usually have a higher Red blood cell (RBC) count than women, and the level of red blood cells tends to decrease with age. The normal RBC count in an adult male is 4.7–6.1 million, an adult female is 4.2–5.4 million and newborns is 4.8–7.2 million.

Birds which swim in water have webbed feet. Ducks, geese, and swans all have webbed feet. The primary use for webbed feet is paddling through the water.

Vitamin K is a group of vitamins that the body needs for blood clotting. Blood clotting or coagulation prevents excessive bleeding internally and externally.

Birds have only one functional ovary, typically on the left side of the body.

Vitamin E is particularly important for the normal activity of sex glands as it improves blood flow and oxygen to sexual organs. It is an antioxidant that helps to maintain healthy skin, eyes and hormonal balance. It also enhances immune function and prevents clots from forming in heart arteries.

Coriander is an annual herb. Its Fresh leaves and dried seeds are most commonly used as food.

Veins seen in the leaves, serve the function of transpiration. They are composed of xylem and phloem cells. The vein xylem transports water from the petiole throughout the lamina mesophyll, and the phloem transports sugars out of the leaf to the rest of the plant.

Melanin is a type of pigment that gives colour to the hair, skin, and eyes in humans and animals. It is a complex polymer derived from the amino acid tyrosine.

Vitamin B₁₂, cobalamin, is a cobalt-containing ring-contracted modified tetrapyrrole that represents one of the most complex small molecules made by nature. The core component of cobalamin is the corrin macrocycle that acts as the main ligand for the cobalt.