Which of the following types of cloning vector can carry the largest amount of foreign DNA?
A. plasmid
B. bacterial artificial chromosome
C. cosmid
D. bacteriophage
Answer: B
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The photo shows the microscopic appearance of maple wood. Using your knowledge of the woody stem section, identify cell type a and the “line” of cells at b. (Note: The outside of the tree from which this section was taken is shown in the photo that accompanies question 8.)
What will be an ideal response?
Arrange the developmental stages in the proper order
a. blastula ? gastrula ? morula b. blastula ? morula ? gastrula c. gastrula ? blastula ? morula d. morula ? blastula ? gastrula e. morula ? gastrula ? blastula
During which phase do sister chromatids separate?
a. interphase b. prophase c. anaphase d. telophase e. metaphase
The first law of thermodynamics states that
1.the total amount of energy in a system and its surrounding remains constant. 2.the total disorder of a system and its surroundings always increases. 3.plants create energy. 4.animals destroy energy.