Abbreviation for post-mortem, or the examination of a body after death, often used in medical and forensic contexts.

An instrument used to record respiratory patterns or lung function.

A condition in which an organism’s internal temperature varies with the temperature of its environment, as in reptiles and amphibians.

A substance that causes harm or death when ingested, inhaled, or absorbed into the body.

A small cell produced during oogenesis that usually does not develop into a viable egg cell and is discarded.

A type of chemical bond where electrons are shared unevenly between two atoms, creating partial positive and negative charges on…

The fine powder produced by male reproductive organs of seed plants, containing male gametes necessary for fertilization.

A male gametophyte of seed plants, containing the sperm cells necessary for fertilization.

A cell in the anther of a plant that undergoes meiosis to produce pollen grains.

Structures within the anthers of flowering plants that contain and produce pollen.