Contracting nucleolar vacuoles are a general and consistent
feature of somatic tobacco cells growing in microcultures. Nucleolar
vacuoles were studied in cells from callus tissues of two
single-cell clones, H-196 and H-239, of hybrid tobacco (Nicotiana
tabacum X N. glutinosa). Vacuoles periodically contracted either
completely or incompletely, apparently releasing a...
It was the intent of this investigation to compare the performance
of community college students to four-year institutional students, both
of whom were enrolled in a college general biology program (GS 101,
102, 103) during the 1967-68 academic year. During the week of
May 27, 1968 measurements were taken of...
The purposes of this study were to develop a valid and
reliable attitudes toward science instrument in the Thai
language and determine the differences in attitudes toward
science and achievement in physical and biological science
of Thai boys and girls in lower secondary education.
The population consisted of 709 students,...
A feral pig population on Santa Catalina Island, California, was
studied for 17 months beginning in July 1980. Density was estimated
to be 21 to 34 pigs/km² (95% confidence interval) using capture-recapture
techniques. Dry season home ranges determined from
radio-telemetry data were small and differed significantly between
boars and sows....