X-rays cannot

x-rays cannot pass through earth's atmosphere. which of these is the best location to place a telescope used to observe x-rays from stars?

a-mountain
b-top of building
c-space
d-high-flying aircraft

Drag each label to the correct location on the image. each label can be used more than once. a scientist introduced mutations in a gene sequence isolated from bacteria. study the sequence, and identify the steps where the mutations may affect the formation of proteins. in the sequence, black letters stand for protein coding regions and red letters stand for noncoding regions. protein will not be changed. protein may be changed. attcgtgttc atcgtgttc atcgtattc attcgtattc

Which statement is true about the cell theory? a) it is well-supported by evidence. b) it is unchangeable and permanent.

The deserts of the sahara and australia are associated with