Exam: TOEFL

Definition: The process by which male reproductive cells, called sperm, are produced and developed in the male reproductive system.

Example: Spermatogenesis occurs in the testes and involves several stages of cell division and maturation.

Definition: Relating to the process of sperm production.

Example: The spermatogenic cells are essential for male fertility.

Definition: Relating to the early stages of sperm cell development in male organisms.

Example: The spermatogonial cells are crucial for the production of sperm in males.

Definition: A type of cell found in the male reproductive organs that develops into sperm cells.

Example: The spermatogonium undergoes several stages of division to eventually form mature sperm.

Definition: A type of plant that produces seeds, including both flowering plants and conifers.

Example: Spermatophytes are essential for many ecosystems as they provide food and habitat for various animals.

Definition: Relating to male reproductive cells that are involved in fertilization.

Example: The study focused on spermatozoal development in various species.

Definition: A type of male reproductive cell that is capable of movement, typically found in plants and produced in a specific structure called an antheridium.

Example: The spermatozoid swims towards the egg cell to fertilize it.

Definition: A mature male reproductive cell that can fertilize an egg, typically having a head, a neck, and a long tail for movement.

Example: The spermatozoon swims through the female reproductive tract to reach the egg for fertilization.

Definition: Having the ability to kill sperm, often used in reference to certain contraceptive methods or products.

Example: The spermicidal gel is applied before intercourse to prevent pregnancy.

Definition: A type of organic compound that is a polyamine, commonly found in living tissues and involved in cellular functions.

Example: Spermine is important for cellular growth and stability.