Which strand must be in rna and not dna

"Ribonucleotides", I think, you aren't giving us answer choices

Uracil is present in RNA and not in DNA

RNA includes cytosine and uracil as pyrimidine bases while DNA has cytosine and thymine. The difference is Uracil as Uracil is not present in DNA. Uracil is less expensive to produce than thymine, and may be used for its use in RNA. But in the case of DNA, uracil is readily produced by chemical degradation of cytosine.

the correct answer is:

a population changes in response to a change in the environment.

homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements, especially as maintained by physiological processes. and this is how it applies to the integumentary system. back to top. skin functions in homeostasis include protection, regulation of body temperature, sensory reception, water balance, synthesis of vitamins and hormones, and absorption of materials. when body temperature falls, the sweat glands constrict and sweat production decreases.