record player. 1. a device for reproducing the sounds stored on a record, consisting of a turntable, usually electrically driven, that rotates the record at a fixed speed of 33, 45, or (esp formerly) 78 revolutions a minute.
Two-generation approaches can be applied to programs, policies, systems, and research. Programs: Two-generation programs provide opportunities for and meet the needs of parents and their children together.
Double fertilization in Arabidopsis. Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (megagametophyte, also called the embryo sac) with two male gametes (sperm).he ovary, surrounding the ovules, develops into the fruit, which protects the seeds and may function to disperse them. The two central cell maternal nuclei (polar nuclei) that contribute to the endosperm, arise by mitosis from the same single meiotic product that gave rise to the egg.