What is a mutation? Are mutations always harmful? Always helpful? Explain

Where is energy trapped inside the organelle chlorophyll

Which animal group is the largest and contains more species from all the other living groups combined? is it mammals or

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.