Which variable does one manipulate in an experiment?

A. Dependent variable
B. Confound variable
C. Controlled variable
D. Independent variable


Answer: D. Independent variable

Biology & Microbiology

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The ____ is a channel for urine to flow from a

kidney to the urinary bladder. It is labeled as ____ on the above diagram.

a. urethra; B b. urethra; D c. ureter; D d. ureter; B e. ureter; C

Biology & Microbiology

Which of the following does not belong?

a. phospholipids b. polysaccharides c. unsaturated fats d. steroids e. saturated fats

Biology & Microbiology

The presence of trans fats in membranes ________ (increases or decreases) membrane fluidity and ________ (increases or decreases) the membrane transition temperature

Fill in the blank with correct word.

Biology & Microbiology

Explain why, after the Industrial Revolution in England, dark-coloured pepper moths became more abundant than the usual light-coloured moths, and why this case is often cited as an example of evolution by natural selection.

What will be an ideal response?

Biology & Microbiology