Which of the following is a density-independent factor affecting population growth? I. Food and good nutrition
II. Disease transmission
III. Floods and droughts

- I only
- III only
- I and II
- II and III

the correct answer should be false

{apex}

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:

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.