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Articles 301 - 303 of 303
Full-Text Articles in Life Sciences
Synlophe Of Nematodirus Neotoma (Trichostrongyloidea), Eric P. Hoberg, Lora G. Rickard, Gary L. Zimmerman
Synlophe Of Nematodirus Neotoma (Trichostrongyloidea), Eric P. Hoberg, Lora G. Rickard, Gary L. Zimmerman
Harold W. Manter Laboratory of Parasitology: Faculty and Staff Publications
The synlophe of Nematodirus neotoma from Neotoma spp. is characterized. The cervical synlophe is composed of 30-32 and 36-42 ridges in males and females, respectively. Of these, 14 and 20-22 ridges are continuous in the cervical zone and extend to the base of the cephalic expansion. Six pairs of lateral ridges are discontinuous but extend greater than one-third the length of the cervical region. In both males and females, the number of ridges increases posteriad, terminating near the bursa in the male, and extending the entire length of the body in the female. The synonymy of N. neotoma and N. …
Patterns Of Resource Use By A Drosophilid (Diptera) Leaf Miner On A Native Crucifer, S. K. Collinge, Svata M. Louda
Patterns Of Resource Use By A Drosophilid (Diptera) Leaf Miner On A Native Crucifer, S. K. Collinge, Svata M. Louda
School of Biological Sciences: Faculty Publications
Distribution and damage of Scaptomyza nigrita Wheeler on its host (bittercress, Cardamine cordifolia A. Gray), a native perennial crucifer, were examined over two growing seasons in relation to leaf position. Concentrations of defensive compounds (glucosinolates) and of nutritive compounds (total nitrogen, free amino acids, soluble carbohydrates) were also examined. The fly-host plant relationship was studied in sun and shade habitats at two sites. Oviposition and leaf-mining damage were concentrated on the lower central leaves of a stem in both habitats. These mature leaves have lower glucosinolate concentrations than new leaves. Adult densities and larval feeding damage were consistently and significantly …
Can We Guarantee The Safety Of Genetically Engineered Organisms In The Environment?, Kathleen H. Keeler, Frances E. Sharples
Can We Guarantee The Safety Of Genetically Engineered Organisms In The Environment?, Kathleen H. Keeler, Frances E. Sharples
School of Biological Sciences: Faculty Publications
Can we guarantee the safety of genetically engineered organisms in the environment? To anticipate my remarks, the answer to the title question is “No, we cannot guarantee the safety of genetically engineered organisms released into the environment.” Indeed, it is a tenet of the scientific method that nothing can be proved, only disproved. Thus, we can never show that a release will be safe. We could only show that it would be unsafe, if that were the case. However, if the question is posed differently, for example, can we safely release genetically engineered organisms into the environment?, the answer is …