An engineer is building an electronic device. she wants to use a material that will give her the most control over the amount of electric charge that flows through a circuit. which material should she use?
a tube
a insulator
a semiconductor
a conductor

!if we removed the wolf, snake, and hawk from this food web, what best explains the impact it would have? a) the number of producers would increase. b)the number of decomposers would increase. c)the number of primary consumers would increase. d)the numbers of primary consumers would decrease.

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection

What is used as a template during replication? a- mrna b- trna c- rrna d- dna