Lololololololololololololololololololol
B, 30% billion, because there are 8 billion people on earth and that answer makes the most logical sense
Answer:
Sharp-spined cactus
Explanation:
Given, that N allele is required for the production of spine and S allele will produce sharp sines.
True breeding sharp spined cactus: NNSS
spineless cactus: nn__ ( we can't fix the allele for second gene since it has not been mentioned as true breeding )
Their progeny: NNSS X nn__ = NnS_
So the progeny is going to be sharp spined because both the dominant alleles N and S are present.
Troposphere
Stratosphere
Mesosphere
Thermosphere
Exosphere