Question 1 Forests, mountains, rivers, and marshes are examples of the wide variety of ecosystems in New York State. The diversity of these ecosystems is most likely the result of *
1 point
(1) the variety of abiotic conditions in these regions
(2) interactions between producers and decomposers
(3) increased efforts to protect endangered species
(4) a lack of competition between the hetero- trophs living there

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 .

if your own plato the answer is b. the fern transitioned from sporophyte generation to gametophyte generation.