Will Mark Brainliest...Need urgently pls

When loading samples in an electrophoresis gel, the the plunger of the micropipette should be depressed until after you have raised the micropipettor away from the gel.

is this true or false?

Eristics do scientists use to distinguish between organisms in different kingdoms

The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.

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?