How have the characteristics of each kind of cell put limitations and provided opportunities for the survival and divergence of modern living things

What links the two strands in a dna helix together in the middle? a. phosphate groups b. sugar rings bonded together c. proteins d. bases with hydrogen bonds

Hey me with this one❤❤❤❤ every organism needs food. does a cell also need it? explain very briefly.

Match the reproductive structures based on their function and the system to which they belong. egg ovary sperm vas deferens vagina fallopian tube testis urethra