From the outside of a tree to its center, which
of the following is the correct order of
appearance?
1. periderm
2. vascular cambium
3. sapwood
4. seconary phloem
5. cork cambium
6. heartwood
a. 1-2-4-5-6-3
b. 1-5-4-2-3-6
c. 1-4-5-2-6-3
d. 1-3-2-5-4-6
e. 1-2-4-5-3-6
B
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Examine the digestive system structures in the figure above. The highest rate of nutrient absorption occurs at location_____
A) 1 B) 2 C) 4 D) 5 E) 8
Certain small towns in the western United States have remained isolated and inbred since their settlement many years ago. Some alleles are more common in these communities as compared to the rest of the population. This effect is known as
A. directional selection. B. artificial selection. C. founder effect. D. Hardy-Weinberg principle. E. disrupting selection.
The difference between phenotype and genotype is that
A) phenotype refers to the genetic instructions and genotype to their expression. B) genotype refers to the genetic instructions and phenotype to their expression. C) the phenotype is RNA and the genotype is DNA. D) the phenotype is DNA and the genotype is RNA.
Which of the following best describes sensory transduction?
A. The analysis of a nerve impulse by the brain. B. The conversion of a stimulus into a nerve impulse by using a receptor. C. The detection of an environmental stimulus by a nerve receptor. D. The conversion of a nerve impulse into a stimulus by using a receptor.