How is sickle cell anemia an example of a pleiotropy? sickle cell anemia is caused by a pair of genes present on different loci of the same chromosome. sickle cell anemia shows a continuous variation in the population. sickle cell alleles affect various organ systems, such as the circulatory and respiratory systems

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?