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.

What part of the cell does 9 represent? a. cytoplasm b. lysosome c. ribosome d. centrosome

Examine the following diagram. place the labeled layers in order from youngest to oldest.

Which of the following observations darwin shape his concept of descent with modification? a) species diversity declines farther from the equator. b) fewer species live on islands than on the nearest continents. c) birds can be found on islands located farther from the mainland than the birdsê¹ maximum nonstop flightdistance. d) south american temperate plants are more similar to the tropical plants of south america than to thetemperate plants of europe. e) earthquakes reshape life by causing mass extinctions.