Which method of studying past climates would you use if you wanted to know what earth 's climate was like over 1000 years ago?
a. tree rings
b. sea flor sediments
c. ice cores
d. all of the above

Would really appreciate it, i have an idea but not completely sure

Which geologic feature would most likely be represented by contour lines john far apart from one another? a cliff a hill a plain a valley

Examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. examine the two squirrel populations in the accompanying figure. the populations are separated by a geographic barrier. if after a long period of time the two species are no longer separated, what evidence is needed to determine if speciation has occurred? the figure shows two populations of squirrels separated by a geographic barrier. polyploidy is creating new species. the two populations are not interbreeding freely. hybrid offspring of the two populations begin to appear. one species will increase into a population size twice as large as the other species.