Biology Alphabet ChallengeOnline version Test your biology knowledge by guessing words for each letter of the alphabet! by Arantxa Bolinches A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Starts with A Organic compounds that serve as the building blocks of proteins. Starts with B The variety of life in a particular habitat or ecosystem. Starts with C The process by which cells convert glucose and oxygen into energy. Starts with D The molecule that carries genetic information in living organisms. Starts with E A community of living organisms and their physical environment interacting as a system. Starts with F The preserved remains or traces of ancient organisms. Starts with G A segment of DNA that contains the instructions for building a specific protein. Starts with H The ability of an organism to maintain stable internal conditions. Starts with I Non-native organisms that disrupt local ecosystems. Starts with J An immature form of an organism that has not yet reached adulthood. Starts with K The number and appearance of chromosomes in the nucleus of a cell. Starts with L A group of organic compounds that are insoluble in water and include fats and oils. Starts with M The process of cell division that results in two identical daughter cells. Starts with N The basic building block of nucleic acids, consisting of a sugar, phosphate, and base. Starts with O The movement of water across a semipermeable membrane from a region of low solute concentration to high. Starts with P The process by which green plants convert sunlight into chemical energy. Starts with Q The ability of bacteria to communicate and coordinate behavior based on population density. Starts with R The biological process by which new individual organisms are produced. Starts with S A close and often long-term interaction between two different biological species. Starts with T The process of copying a segment of DNA into RNA. Starts with U A small protein that tags other proteins for degradation. Starts with V A substance that stimulates the immune system to provide protection against disease. Starts with W An area of land that drains into a particular body of water. Starts with X A chemical compound that is foreign to a living organism. Starts with Y A type of fungus used in fermentation and baking. Starts with Z The initial cell formed when two gametes merge during fertilization.
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