Fossils of archaeopteryx. the carliest known bird show which of the following unique characteristics that indicate its dinosaur origins ?

Which element provides strength to the exoskeleton of clams and oysters

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.

Apuppy’s tendency to chew is inherited through which of the following? a. through learned behavior b. through genes c. through seasonal cycles d. through hibernation