Plz me i need this ! which of the following describes soil and temperature in an ecosystem?
a. unnecessary factors
b. abiotic factors
c. biotic factors
d. selection factors

As far as the ecosystem is concerned, soil and temperature are abiotic factors.

The biotic factors of the ecosystems are living factors. They consist of all the living organisms and their relationship with each other in the ecosystem.

The abiotic factors are also known as nonliving factors. They include soil, temperature, pressure, salinity, wind, etc.

Thus, temperature and soil are parts of the nonliving factors of the environment.

More on environmental factors can be found here: link

Explanation:

Abiotic factor: Nonliving chemical and physical parts, just like temperature and soil in an ecosystem

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.