Tay-Sachs disease is caused by an autosomal recessive allele. The disease is characterized by mental deficiency and blindness, with death occurring by four years of age. The incidence of the disease among newborns is about 10 per million births. Assuming Hardy-Weinberg equilibrium, estimate the frequency of the allele and of the heterozygotes.

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

An easy way to calculate the amount of energy available at each level is to what?

The negative change found inside the plasma membrane is created by potassium ions sodium ions hydrogen ions chlorine ions