If a dna molecule is compared to a spiral staircase what parts makes up the steps

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.

Which of the following is not a potential result of deforestation?

Where substance is produced during cellular respiration