Penguins are powerful swimmers. Scientists have concluded that penguins evolved adaptations for powerful swimming early in their evolutionary history. Which of the following pieces of evidence did scientists most likely use to make this conclusion?a. DNA sequences of different penguin speciesb. maps of the global distribution of penguin speciesc. fossils showing the shape of ancient penguins’ wings and feathersd. x-rays of the bone structure in modern penguins’ wings

answer; a male inherits only one allele of the x-linked gene controlling hair color;

increase soil erosion                                             reduce soil erosion

cattle grazing                                                         hydroseeding

deforestation                                                         contour plowing

                                                                                planting vegetation

plant roots basically hold the top soil

together and stop soil erosion because

in such situation top soil is not removed

during flood but cattle grazing causes

soil erosion because cattle consume the

grasses and herbs and top soil is exposed.

same situation occurs because of

deforestation, the trees and plants are cut

down to expose top soil which causes soil

erosion

a plastic spoon that has a temperature of 78° f is placed into a bowl of soup that has a temperature of 84° f. which of these correctly describes what will happen?

energy as heat moves from the soup to the spoon.