Most genetically modified crops carry genes
for
a. herbicide resistance.
b. disease resistance.
c. nutritional enhancement.
d. making human medicines.
e. increased yields
B
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Which one of the following is not an adaptation shown by modern birds?
A. a respiratory system that allows all of the air to pass through the lungs in one direction B. complete division of the heart into right and left halves C. endothermy D. wings and a long feathered tail E. modified beaks and feet to support feeding behavior
In order to transfer all the genes to an F- cell we would need how long?
a. 1 minute b. 20 minutes c. 3 minutes d. 14 minutes e. 5 minutes
Fifty-million sperm were examined for mutations in a specific gene and 100 mutations were found. What was the mutation rate for this gene?
A) 5 × 10?6 B) 50 × 10?6 C) 2 × 10?6 D) 2 × 10?5 E) 5 × 10?5
If 1 cc of a substance has a mass of 1.5 g, its density is
a. 0 .67 b. 1 .0 c. 1 .5 d. 2 .5