What do arteries do?
a. carry blood to the heart from the rest of the body
b. carry blood away from the heart to the rest of the body
c. carry blood from one part of the heart to another
d. store blood without moving it

What is thought to have caused the mass extinction at the end of the cretaceous period?

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.

Anormal strand of dna is shown below, followed by the same strand of dna after mutations have occurred.