What method would be the best choice for a climatologist to find out what the ocean temperatures were like during the Pleistocene ice ages 30 million years ago? Analyze ice core samples from pleistocene glaciers.

Analyze the tree rings of petrified wood from the Pleistocene.

Analyze alkenones molecules of phytoplankton in rocks of that period.

Analyze O-18 ratios from Antarctic glaciers.

Consider the last statement in the prompt: "people take such environmental factors into account in their choices when deciding where to live." do all people have a choice as to where they live? what factor plays a key role in this decision and may therefore play a large role in determining quality of life?

Turtle hatchling survivorship rate is low in many turtle species due to predation. amanda researched the predatory rate on a species of turtle eggs in the red river. the eggs were harvested from trapped turtles and the egg's cloaca film (reproductive discharge) was either washed off or left on once gathered. research suggests that predators use the female's cloaca scent to locate the eggs. the eggs were only handled when wearing gloves and then reburied along islands where the turtles were trapped. the nests were monitored by cameras and manually on foot and data on nest predation were recorded. a. based on the experimental design, what is the dependent variable? b. based on the experimental design, what is the independent variable? c. based on the experimental design, what is the control?

People with one sickle cell allele are not likely to get malaria. what is this an example of?