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.
Gravity can be such a tricky subject to talk about I wish I could answer this I need to study more
I would say the answer is A
Semipermeable means the cell membrane can pick and choose what goes out of it and into it. At least, that's what I believe it is.
its the phenotype. i just did it but it says i have to use 20 characters