Tube Nucleus: One of the cells in the male gametophyte in seed plants. The tube nucleus grows through the stigma, style, and into the ovule, clearing the way for the sperm nuclei to enter the embryo sac.

 

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Tube Nucleus: One of the cells in the male gametophyte in seed plants. The tube nucleus grows through the stigma, style, and into the ovule, clearing the way for the sperm nuclei to enter the embryo sac.

Pollen Tube: Structure produced by the tube nucleus in the pollen grain through which the sperm nucleus (or nuclei in angiosperms) proceed to travel through to reach the egg.

Tentacle-Tube-Foot Suspension Feeder: Suspension feeder that traps particles on distinct tentacles or tube feet (in echinoderms)

Tube (Enclosure): A type of woofer enclosure consisting of a long tube with a woofer at one end, and a port or Passive Radiator at the other. A good low-end reproducer, this design is very compact and general . . . View Full Definition

Suprachiasmic Nucleus (SCN): A region of the hypothalamus that controls internal cycles of endocrine secretion.

Sieve Tube Members: Phloem cells that form long sieve tubes. See sieve elements.

Pronucleus: The nucleus of a sperm or egg prior to fertilization.

Tube Cooled: A motor in which heat is dissipated by air-to-air heat exchange.

Sonotube: Round, large cardboard tubes designed to hold wet concrete in place until it hardens.

Pleurisy root (Asclepias tuberosa): Remedy for colds and flus, expectorant.