PROBLEM STATEMENT: A fruit export company has been losing 20% of their crop and harvesting due to diseases which affect the stored fruit. A supervisor was asked to investigate the matter. He reported that many of the diseased fruit also have bruises obtained during harvesting. He suggested that mechanical damage increases the chances of the fruits becoming diseased. Plan and design an investigation to determine the effect of mechanical damage during harvesting on the rate of disease susceptibility. What is the hypothesis and variables of this experiment?

Which of these is most likely to happen if parallax measurements of star distances are taken after a gap of six months? the results would be accurate the results would be inconsistent the results would not be valid the results would not be repeated

Aplant may open end close its stomata to prevent excess water loss and maintain

Female luna moths (actias luna) attract males by emitting chemical signals that spread through the air. a male hundreds of meters away can detect these molecules and fly toward their source. the sensory organs responsible for this behavior are the comblike antennae visible in the photograph shown here. each filament of an antenna is equipped with thousands of receptor cells that detect the sex attractant. based on what you learned in this chapter, propose a hypothesis to account for the ability of the male moth to detect a specific molecule in the presence of many other molecules in the air. what predictions does your hypothesis make? design an experiment to test one of these predictions.