When you see a crack itâs important to determine where it is and how severe it is. In order to figure out whether itâs a big deal, you need to know what kind of foundation system you have. For this article Iâm going to talk about âpier and curtain wallâ foundations. This type of foundation is most common in the pre-1950 houses in Durhamâs in-town neighborhoods.
A gametangium (plural: gametangia) is an organ or cell in which gametes are produced that is found in many multicellular protists, algae, fungi, and the gametophytes of plants. In contrast to gametogenesis in animals, a gametangium is a haploid structure and formation of gametes does not involve meiosis.
tapetum lucidum. the iridescent reflecting tissue layer of the choroid of some species of animals that gives their eyes the property of shining in the dark. It is characteristic of nocturnal animals and allows incident light two opportunities to stimulate the retinal receptors.Called also choroidal tapetum.apetum lucidum. A reflecting pigment layer lying behind the visual receptors of the retina of certain mammals (e.g. cats, dogs), birds and fish, which gives a shining appearance to the eyes when illuminated in the dark.