ADOPTION PROCEDURES IN CALIFORNIA: WHAT PHYSICIANS SHOULD KNOW ABOUT THEM

With demand for adoptable babies offered through agencies far exceeding the supply, independent and “black market” adoptions have increased.Although adoptions through agencies are looked upon as better ultimately for both the child and the foster parents, the process is a slow one and the period of waiting for a suitable child often discouragingly long. In this regard an increase in the number of agencies would be helpful, but little use has been made of legislation permitting the organization of such agencies in California counties. There are many ways by which physicians may promote adoptions through existing agencies and the setting up of additional organizations for the purpose.     

EMOTIONS IN THE FIELD: WHAT ARE WE TALKING ABOUT?

In the anthropology of emotion, rival approaches – cultural relativism and a universalism based on common humanity or shared experience – imply different forms of engagement in the field. This article, a sceptical appraisal, suggests that ethnographers commonly fail to build the diversity of emotional practice into their accounts and have therefore provided a flawed basis for theorizing and comparison. With reference to two Indonesian cases – Nias and Java – I suggest that the domain of emotion is diversely bounded cross-culturally and is inconsistently constructed in particular contexts. This has critical implications for fieldwork methodology, cross-cultural comparison, and theories of human development.     

WHAT DO WE KNOW ABOUT CHAROPHYTE (STREPTOPHYTA) LIFE CYCLES?1

The charophyte algae are the closest living relatives of land plants. Their life cycles are usually characterized as haploid with zygotic meiosis. This conclusion, however, is based on a small number of observations and on theoretical assumptions about what kinds of life cycle are possible. Little is known about the life cycles of most charophytes, but unusual phenomena have been reported in comparatively well‐studied taxa: Spirogyra and Sirogonium are reported to produce diploid gametes with synapsis of homologous chromosomes before fusion of gametic nuclei; Closterium ehrenbergii is reported to undergo chromosome reduction both before and after syngamy; and zygotes of Coleochaete scutata are reported to replicate their DNA to high levels before a series of reduction divisions. All of these phenomena require confirmation, as does the conventional account.     

WHAT DOES COMBINING MOLECULAR DATA SETS TELL US ABOUT DIATOM ORIGINS AND PHYLOGENY?

The past several years have seen an abundance of molecular sequence data gathered on heterokont algae and other stramenopiles with the goal of resolving phylogenetic relationships among major groups. The original focus was on SSU rDNA sequence, but lately a significant number of sequences of plastid and mitochondrial encoded genes (specifically rbcL and coxI) have been made available. Of particular interest to us has been the origin of diatoms and the relationship of diatoms to other stramenopiles. According to most claims based on morphological data, typically viewed from a non-rigorous evolutionary taxonomy standpoint (i.e. not with explicit cladistic or phylogenetic systematic methodology), diatoms are closely related to silica-scaled golden brown algae (chrysophytes or synurophytes). SSU rDNA sequence data, however, often place diatoms at the base of the heterokont alga tree, and chryso/synurophytes at the tip with eustigmatophytes, for example, as the chryso/synurophyte sister group. More recent analysis of rbcL sequences, however, supports the traditional classification. It is not automatically to be assumed that there is incongruence between the sequences, however. Taxon sampling is different in the different analyses, methods of analysis are often different, assumptions used to "filter" data are different, etc. Moreover, the relative strength of signal appears to be different in the data sets. We will present an analysis of combined SSU, rbcL and coxI data, an analysis of taxon-sampling issues, and review underlying assumptions and methodologies in an attempt to a) better understand the results of prior studies and b) reconcile the different hypotheses.