Curly hair, large nose, brown eyes: our give the instructions that determine human traits, like these?

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?

Witch theory suggests all living things are made up of cell or cells

Why did adult crab numbers decline in he ecosystem, even though sea stars were still available?