10 points for each answer brainliest as well Based on the Nebular theory, which of these is a step in the formation of the center of a new planetary system?
A. evaporation of condensed gases due to heat
B. combination of condensed gases due to gravity
C. contraction of condensed gases due to nuclear fission
D. expansion of condensed gases due to nuclear fission

answer by yourhope:

hi! : )

in which structure in the nucleus are ribosomes made?

b) nucleolus!

: )

the answers are a and c

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: