Orchid Tuber Ontogeny

Orchid mantis

James O'Hanlon introduces the orchid mantis, a species of preying mantis that resembles flowers.

Orchid bees

protozoa, such as those that cause sleeping sickness, leishmaniasis, and even malaria, predominantly reproduce clonally, which is, of course, of considerable medical significance. In May 1991, Tibayrenc returned to my lab, now at UC Irvine, for 14 months of additional research. We have continued collaborating to the present. Are science and religion compatible? Evolution and religious beliefs n...

Species recognition in the truffle genus Tuber -- the synonyms Tuber aestivum and Tuber uncinatum.

The two morphologically similar truffles Tuber aestivum and T. uncinatum have caused confusion because T. uncinatum is regarded by different authors, as either a distinct species, variety, subspecies, or synonym of T. aestivum. A clarification of the relationship between the two truffles would help both conservation biology and cultivation. We aimed both to test the reliability of the only quan...

I-1: Spermatogonial Ontogeny in Mice

Background:Spermatogenesis is maintained by a pool of the spermatogonia. The group formed by As, Apr and Aal is known as undifferentiated type a spermatogonia (Aund). The Aal spermatogonia will differentiate, with no mitotic division, to the differentiating type A1 spermatogonia. The type A1 spermatogonia undergo 6 successive mitotic divisions to yield A2, A3, A4, intermediate-type (In), and ty...

The Seductive Orchid