![]() ![]() ![]() It consists of a nucleus, containing the genetic material, surrounded by the cytoplasm in which are mitochondria, lysosomes, ribosomes, and other organelles. It consists of a fluid (see blood plasma) containing cells (erythrocytes, leucocytes, and platelets) blood vessel an artery, capillary, or vein bone any of the various structures that make up the skeleton in most vertebrates cell the basic structural and functional unit of living organisms. They are prokaryotic, unicellular, and either free-living in soil or water or parasites of plants or animals binary fission asexual reproduction in unicellular organisms by division into two daughter cells biomass the total number of living organisms in a given area, expressed in terms of living or dry weight per unit area blood a reddish fluid in vertebrates that is pumped by the heart through the arteries and veins, supplies tissues with nutrients, oxygen, etc, and removes waste products. (of an organism or process) requiring the absence of or not dependent on the presence of oxygen anterior of or near the head end asexual not involving the fusion of male and female gametes, as in vegetative reproduction, fission, or budding assimilation the change of digested food into the protoplasm of an animal also, the absorption and incorporation of nutritive elements by plants, as in photosynthesis bacteria a very large group of microorganisms comprising one of the three domains of living organisms. ![]() Aerobic (of an organism or process) depending on oxygen agglutination proteinaceous particles, such as blood cells and bacteria, that form clumps in antibody–antigen reactions albino a person with congenital absence of pigmentation in the skin, eyes, and hair allele or allelomorph any of two or more variants of a gene that have the same relative position on homologous chromosomes and are responsible for alternative characteristics, such as smooth or wrinkled seeds in peas anaerobic ![]()
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