The earth's atmosphere is divided into five layers. in the middle layer is where most foreign objects, such as meteors, will burn up as they enter the atmosphere. a) exosphere b) mesosphere c) stratosphere d) troposphere

One of the purposes of transcription is to produce a sequence of bases that

Which is the correct order in the scientific process? ask a question ® form a hypothesis ® make an observation ask a question ® make an observation ® form a hypothesis make an observation ® form a hypothesis ® ask a question make an observation ® ask a question ® form a hypothesis

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different