A mineral can be scratched by quartz. Its hardness is: A. equal to 7

B. less than 7

C. greater than 7

D. equal to or less than 7

Amale bird-of-paradise uses a dance to attract mates in which it flaps its tail feathers on the ground and jumps around a potential female mate. a different male bird-of-paradise does a similar dance but it jumps around the female in the opposite direction. the female bird is only attracted to one style of dance, in one direction. this is an example of speciation.

According to the cladogram, which organisms have roundworms as a common ancestor?

An example of a trait that would be considered acquired and inherited is a. a cleft chin b. muscle tone c. scar tissue d. freckled skin