The exon theory of genes states that:

a. genes consist solely of exons.
b. introns are deleterious and are purged from the genome.
c. introns lead to recombination errors.
d. many current genes arose through the rearrangement of exons.
e. introns disrupt protein structure.


D

Biology & Microbiology

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a. Higher trophic level b. Primary consumer c. Decomposing d. Grazing e. Detrital

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Refer to Figure 40-1. Which labeled portions of the skin would be affected by UV light?


a. 1 and 5
b. 1 and 15
c. 5 and 15
d. 5 and 14
e. 1, 14, 15

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The atmosphere contains approximately ____ percent nitrogen. 

A. 2 B. 10 C. 50 D. 80

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How many Calories in a kilojoule?

What will be an ideal response?

Biology & Microbiology