The place of birth of the town's residents was There also have been numerous reports of amphibian kills after chemical spills or agricultural spraying. Railways of the Yorkshire Dales. Ilkley: Great Northern Book.
Regina Bailey. What was the first TV dinner? Share Flipboard Email. What is it called when the male sex cell and female sex cell in plants fuse? Ask Login. Uterus and cervix The uterusalso called the womb, is a muscular bag with a soft lining.
Stokoehead of Richmond school. The abnormal morphologies of the ovarian follicles and oocytes in female alligators from Lake Apopka are similar to those observed in mice treated with DES Iguchi et al. Retrieved 22 May Also, the sex ratio of the offspring was not recorded, which could have had important implications.
Collectively, the studies described above suggest considerable geographic variation in sperm concentration; however, the degree to which the differences are ascribable to population selection is still not known. The question of whether sperm concentration has declined over the past 50 yr may not be the appropriate question for study.
Reported reproductive disorders in wildlife have included morphologic abnormalities, eggshell thinning, population declines, impaired viability of offspring, altered hormone concentrations. It has also been suggested that the skewed sex ratios observed in western gulls in California and in Great Lakes herring gulls might have been caused by estrogenic contaminants, such as DDT , in the environment, either due to a differential male mortality or a feminization of male embryos which resulted in chemical sterilization and a failed recruitment into the breeding population Fry et al.
The corona radiata are outer protective layers of follicular cells that surround the zona pellucida.