The degree of erosion in the United States is best described by the following statement.
A. Removal of trees helps build up topsoil and prevents erosion.
B. There is a set amount of soil that was originally formed and erosion continually removes some of it; therefore we will one day run out of topsoil due to erosion.
C. Farmland soil is eroding faster than it is being formed.
D. Soil forms at generally the same rate as soil erodes, so there is an overall balance just as worldwide precipitation equals evaporation; it is just not evenly spread across the landscape.
Answer: C
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This pigment is responsible for the red-yellow coloration seen in leaves during the color change in autumn.
A. chlorophyll a B. chlorophyll b C. carotenoids D. porphyrin E. phytol
Which of the following describes the gel electrophoresis technique?
a. Separating molecules based on their size and charge b. Making multiple copies of DNA for further analysis c. Creating multiple copies and expressions of genes d. Modifying an organism’s DNA to achieve certain traits
The fruit or pericarp of angiosperms is ultimately made from the
a. ovary b. androecium c. perianth d. corolla e. calyx
Provide one example of an agricultural application of biotechnology
What will be an ideal response?