A to Z: Kingdoms, Cells, and MicrobesVersión en línea Guess one term per letter about organisms and their traits. por Ester Marín Olivares A B C D E F G H I J L M N O P Q R S T U V X Y Z Empieza por A An organism that makes its own food from light or chemical energy. Empieza por B Microscopic single‑celled organisms lacking a nucleus. Empieza por C Organelle in plant cells that carries out photosynthesis. Empieza por D Photosynthetic single‑celled or colonial protists with silica shells. Empieza por E An organism whose cells contain a nucleus and other organelles. Empieza por F Heterotrophic organisms that absorb nutrients from their surroundings. Empieza por G Reproductive cell that fuses with another to form a new organism. Empieza por H An organism that cannot make its own food and depends on others. Empieza por I Animal without a backbone. Empieza por J Cnidarian marine animal with stinging tentacles. Empieza por L A composite organism made of fungus and algae living together. Empieza por M Archaea that release methane during metabolism. Empieza por N Cellular control center that stores and protects DNA. Empieza por O Specialized structure inside a cell with a specific job. Empieza por P Mostly single‑celled or simple multicellular organisms not in other kingdoms. Empieza por Q Process where cells detect their population density to coordinate actions. Empieza por R Molecular machines that build proteins using genetic code. Empieza por S Group of organisms capable of interbreeding and producing fertile offspring. Empieza por T Group of similar cells forming a structural and functional unit. Empieza por U Organism consisting of a single cell performing all life functions. Empieza por V Non‑cellular agent that infects hosts and replicates inside cells. Empieza por X Plant tissue that transports water from roots to shoots. Empieza por Y Single‑celled fungus used in baking and fermentation. Empieza por Z Small freshwater fish used as a model organism in research.