Gas exchange happens in the spongy mesophyll tissue of the leaf. Spongy mesophyll cells are covered by a thin layer of water and loosely packed. When the plant is photosynthesising during the day, these features allow carbon dioxide to diffuse into the spongy mesophyll cells, and oxygen to diffuse out of it.pongy mesophyll cells are covered by a thin layer of water and loosely packed. When the plant is photosynthesising during the day, these features allow carbon dioxide to diffuse into the spongy mesophyll cells, and oxygen to diffuse out of it.
In biometrics and forensic science, minutiae are major features of a fingerprint, using which comparisons of one print with another can be made. Minutiae include: 1  Ridge ending â the abrupt end of a ridge. 2  Ridge bifurcation â a single ridge that divides into two ridges. 3  Short ridge, or independent ridge â a ridge that commences, travels a short distance and then ends.
The two species also clearly differ in craniometry (Amano et al. 1992, Jefferson 2002). Within the Narrow-ridged species, two subspecies are retained: the Yangtze Finless Porpoise, N. a. asiaeorientalis, and the East Asian Finless Porpoise or Sunameri, N. a. sunameri (Gao 1991; Wang 1992a,b; Gao and Zhou 1995).Where Narrow-ridged Finless Porpoises have been studied fairly well (e.g. Yoshida et al.he two species also clearly differ in craniometry (Amano et al. 1992, Jefferson 2002). Within the Narrow-ridged species, two subspecies are retained: the Yangtze Finless Porpoise, N. a. asiaeorientalis, and the East Asian Finless Porpoise or Sunameri, N. a. sunameri (Gao 1991; Wang 1992a,b; Gao and Zhou 1995).