Explanation

Phenotype refers to the observable characteristics or traits of an organism (like eye color, height).

It results from the interaction of the genotype with the environment.

Explanation

Albinism is a recessive genetic trait, so both parents must be carriers (Aa).

The Punnett square for Aa × Aa gives a 25% chance (aa) of having an albino child.

Explanation

STH (Somatotropic Hormone) is also known as Growth Hormone (GH).

It promotes protein synthesis even after the growth phase ends.

It plays a role in tissue maintenance, muscle development, and metabolism throughout life.

Explanation

Endocrine glands secrete hormones directly into the bloodstream, without using ducts.

Examples include the pituitary, thyroid, adrenal, and pancreas (as an endocrine gland).

Explanation

Explanation

Insulin is a hormone secreted by the beta cells of the pancreas.

It helps regulate blood glucose levels by promoting glucose uptake into cells.

Explanation

Gastrin is a digestive hormone secreted by G-cells in the pyloric region of the stomach.

It stimulates the secretion of gastric acid (HCl), aiding in the digestion of food.

Explanation

After fertilization, the ovule develops into a seed, which contains the embryo and stored food.

The surrounding ovary turns into a fruit, while the ovule becomes the seed.

Explanation

Each megaspore mother cell undergoes meiosis, producing four haploid megaspores.

Out of these, typically one megaspore develops into the female gametophyte, but initially four are produced.

Explanation

The margin of the prothallus (the gametophyte stage of Adiantum) is typically one cell thick.

This thin edge helps in gas exchange and absorption, important for the fern’s reproduction and development.