Can anyone help me with my biology work tomorrow?​

Which element forms the basis of all organic organisms a carbon b oxygen c hydrogen d nitrogen

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?

What could happen if two base pairs on a strand of dna or switched