Part B: Understanding Half-Life 2. Study Data Table 1 below. It contains information about the parent-daughter ratios of the isotope uranium-235 (U-235) for several of
the rock layers in the block diagram.

How many trophic levels are there in the following food chain? phytoplankton - shrimp - perch - pike - osprey

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

Which medullary index indicates a human hair? a. 0.653 b. 0.733 c. 0.516 d. 0.256