Your friend Mabel studies wild populations of bison in Yellowstone National Park. She notes that the mean horn length is 30 cm with a variance of 5 cm. She knows that bison horns are an important defense weapon and is curious if evolution might select for longer horns. After intense study of the bison population, Mabel determines the variance components to be: VA=0.1, VD=0.2, VI=0.3, VG=0.6, VE=3.4, VGE=1.0. In your informed opinion, how well will horn length respond to selection for longer horns in this population?

it's a.true. i'm kind of smart.

answerbloodstream;

1. the geologists have established a set of principals that can can be used o determine the relative ages of rock. this principal is applied to sedimentary and volcanic rocks. the rocks exposed to wall of grand canyon has layers and by studying the number of horizontal layers in the rock(strata) the relative age can be determined. the layer first formed will appear at the bottom and the the layer of strata last formed appear at the top. by using this information the approximate age of rocks can be determined.

2. carbon dating is used to find the relative age of rock in numbers which means for the rocks that has age between 1-70,000 years.

3. for the rocks of age range between 1,000 - billion of years potassium-argon dating is used.