Exam: IELTS

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.

Definition: The process by which sperm cells are formed from precursor cells in the male reproductive system.

Example: Spermiogenesis is a crucial step in the development of male gametes.

Definition: To flow out quickly and in large amounts, often in a forceful way; can also mean to vomit.

Example: The volcano began to spew lava and ash into the sky.

Definition: A substance or material that has been forcefully expelled or emitted, often in a chaotic or uncontrolled manner.

Example: The volcano's spew covered the surrounding area in ash and debris.

Definition: To forcefully send out or eject something in a large amount, often in a stream; it can also mean to vomit.

Example: The volcano began to spew lava and ash into the sky.

Definition: A mineral that contains calcium, titanium, and silicon, often found in small brown or yellow crystals, and sometimes used as a gemstone.

Example: The jeweler showed me a beautiful ring with a sphene stone.

Definition: Relating to a specific bone in the skull that is shaped like a wedge.

Example: The sphenoid bone is located at the base of the skull and helps form the eye socket.

Definition: A bone located at the base of the skull that helps form the eye socket and supports the structure of the face.

Example: The sphenoid bone is crucial for the stability of the skull.