What prevents the backflow of urine from the urinary bladder to the kidneys?

Apea plant that is heterozygous for the tall phenotype can produce short offspring when self pollinating. which of the following explains why this occurs? a. segregation of allels b. condominance of traits c. polygenic expression of traits d. independent assortment of alleles

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

Based on anatomical similarities, to which modern animal is dr. digger’s creature most closely related?