Jonas salk was awarded the nobel prize for discovering a way to vaccinate against polio in the united states in the 1950's. this allowed millions of school-age children to avoid a crippling disease, and to swim during summer again, as polio was often spread in public swimming areas before. which statement most closely describes how the polio vaccine works?

25. what does meiosis create? haploids or diploid? somatic cells or gametes?

Sea levels are rising due to climate change while increasing numbers of people are moving into coastal areas. to accommodate more people, there has been increased construction of beachfront resorts and condominiums. how is this impacting sea turtle numbers and biodiversity and why? a. the increased human population in coastal areas has meant that more food is available to the turtles (e.g., dropped food, waste from restaurants), which has led to an increase in the numbers and diversity of sea turtles. b. there has been very little change in the numbers and biodiversity of sea turtles because the planet is so vast that they can simply relocate to less crowded beaches. c. this has resulted in a decrease in numbers and diversity of sea turtles because it is restricting available nesting sites, and hence reproduction. d. this has resulted in an increase in numbers and diversity of sea turtles because people are around to protect them from natural predators.

Where can you find prokaryotic and eukaryotic cells?