Chapter 11 vocabulary


Abiotic Factor- In biology and ecology, abiotic components or, abiotic factors, are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.

Biotic Factor- A biotic factor is any living component that affects another organism, including animals that consume the organism in question, and the living food that the organism consumes. Each biotic factor needs energy to do work and food for proper growth. Biotic factors include human influence.

Ecosystem- An ecosystem is a community of living organisms (plants, animals and microbes) in conjunction with the nonliving components of their environment (things like air, water and mineral soil), interacting as a system.

Habitat- A natural home or environment.

Organism- A celled life form.

Population- All the inhabitants.

Community- A group of organisms living in the same place.

Classification- An action of classifying something.

Taxonomy- The branch of science concerned with classification.

Cell- The smallest structural and functional unit of an organism, typically microscopic and consisting of cytoplasm and a nucleus enclosed in a membrane. Microscopic organisms typically consist of a single cell, which is either eukaryotic or prokaryotic.

Cell Membrane- The semipermeable membrane surrounding the cytoplasm of a cell.

Cell Wall- A rigid layer of polysaccharides lying outside the plasma membrane of the cells of plants, fungi, and bacteria. In the algae and higher plants, it consists mainly of cellulose.

Organelle- Any of a number of organized or specialized structures within a living cell.

Tissue- Any of the distinct types of material of which animals or plants are made, consisting of specialized cells and their products.

Organ- A part of an organism that is typically self-contained and has a specific vital function, such as the heart or liver in humans.

Unicellular- (of protozoans, certain algae and spores, etc.) consisting of a single cell.(of an evolutionary or developmental stage) characterized by the formation or presence of a single cell or cells.

Multicellular- (of an organism or part) having or consisting of many cells.

Autotroph- An organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide.

Heterotroph- An organism deriving its nutritional requirements from complex organic substances.

Prokaryotic- A prokaryote is a single-celled organism that lacks a membrane-bound nucleus (karyon), mitochondria, or any other membrane-bound organelles.

Eukaryotic- A eukaryote is any organism whose cells contain a nucleus and other organelles enclosed within membranes. Eukaryotes belong to the taxon Eukarya or Eukaryota.