(i need this answer quick fast and in a hurry. i'm on a cumulative exam)which element is most important for adding strength to hair, feathers, and outer skin? a. oxygen b. hydrogen c. sulfur d. phosphorus

Athermometer is placed in water in order to measure the water’s temperature. what would cause the liquid in the thermometer to rise?

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

What are genotypes? what are phenotypes?