| corresponding in function, but not evolved from corresponding organs, as the wings of a bee and those of a hummingbird |
| a widely distributed group of photosynthetic prokaryotic organisms, resembling phototrophic bacteria, occurring in diverse habitats |
reproduction re·pro·duc·tion (rē'prə-dŭk'shən)
n.
The act of reproducing or the condition or process of being reproduced.
Recall of a memory.
The sexual or asexual process by which organisms generate others of the same kind.
| reproduction (rē'prə-dŭk'shən) Pronunciation Key
The process by which cells and organisms produce other cells and organisms of the same kind. ◇ The reproduction of organisms by the union of male and female reproductive cells (gametes) is called sexual reproduction. Many unicellular and most multicellular organisms reproduce sexually. ◇ Reproduction in which offspring are produced by a single parent, without the union of reproductive cells, is called asexual reproduction. The fission (splitting) of bacterial cells and the cells of multicellular organisms by mitosis is a form of asexual reproduction, as is the budding of yeast cells and the generation of clones by runners in plants. Many plants and fungi are capable of reproducing both sexually and asexually, as are some animals, such as sponges and aphids. |