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A parasite is an organism that lives at the expense of another living being, called the host, often causing it harm.The parasite uses the host's resources to feed, grow, or reproduce, which can weaken or make the host sick.

A pathogen is a microorganism, such as a bacterium, virus, fungus, or parasite, capable of infecting a living organism and causing disease.These pathogens enter the body, multiply, and can damage cells or disrupt the normal functioning …

Photosynthesis is a process carried out by plants, algae, and certain bacteria that converts the sun's light energy into chemical energy stored in glucose. This process takes place in chloroplasts, using chlorophyll, a green pigment tha…

Puberty is a transition phase between childhood and adulthood during which the body undergoes physical and hormonal changes that allow the development of secondary sexual characteristics and the capacity to reproduce.In girls, this incl…