Suppose you were interested in whether the concentration of herbicides in pond water affected egg development in frogs.  You measure herbicide concentration and egg developmental success in 10 ponds that are similar in size and location, and you plot your data on a graph.  Of the figures above, which plot would suggest a negative correlation between herbicide concentration and egg developmental success.  

In this type of contraction, muscle develops enough tension to lift a load.   

A blueberry farmer is concerned that animals are eating his berries before harvest.  He wants to determine whether birds or rodents may be eating the berries.  Because he has observed birds in his fields every morning, he hypothesizes that birds are eating the berries and having a negative impact on his harvest.  He predicts that if he excludes birds from blueberry bushes, he will harvest more berries.  In an experimental blueberry field, he covers half the rows with nets that keep birds out; the other rows remain as they were.  He weighs the number of berries harvested from each row over an eight week period. What is the control group in the farmer’s experiment?

What is the muscle indicated b y the tip of the arrow?  

The sympathetic divine has this effect on the pupils:   

An organ will be influenced by the parasympathetic more than the sympathetic if the first division (parasympathetic) sends to the organ: 

What is the muscle indicated by the tip of the arrow?    

The fibers of the parasympathetic division are part of:  

In the wall of the hollow organs there can be so many layers of smooth muscles:   

What is the muscle indicated by the tip of the arrow?