Which structures are found only in plant cells, not in animal cells? - [ ] A and B
- [ ] B and C
- [ ] C and D
- [ ] D and A

answer is b and c

Explanation:

they have different cells, and chloroplast is only in plant cell

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

after receiving a stimus, the sensory receptors send(s) signals to the appropriate area of the body.  

the must be sensory neurons.  

hope its .