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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____ food chains tend to predominate in aquatic ecosystems
a. Higher trophic level b. Primary consumer c. Decomposing d. Grazing e. Detrital
Biology & Microbiology
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
Biology & Microbiology
The atmosphere contains approximately ____ percent nitrogen.
A. 2 B. 10 C. 50 D. 80
Biology & Microbiology
How many Calories in a kilojoule?
What will be an ideal response?
Biology & Microbiology