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Excretory System › View

The main nitrogen-containing waste excreted in urine of aves is

A. ammonia

B. uric acid

C. nucleotides

D. urea

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Psychology › View

Scientists conducted a study involving two variables. Their research indicated a strong positive correlation between the two variables. This means that

A. as one variable increases, the other decreases

B. there is no observable association between the variables

C. there has been an error in the calculations

D. as one variable increases, the other also increases

E. there is a very good chance the two variables are causal

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