Which of these is a +/+ interaction?
A. competition
B. mutualism
C. commensalism
D. parasitism
E. competition and parasitism
B. mutualism
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T4 and other bacteriophages commonly use a method of DNA replication and packaging called "headful packaging."
Explain how viral genomes are replicated and packaged in this process and hypothesize how headful packaging might affect evolution of BOTH the bacteriophages and their prokaryotic hosts. What will be an ideal response?
The function of the vascular cambium (a type of meristem) is to:
A. produce new growth at the tip of stems B. produce secondary xylem and phloem C. produce only xylem to make wood D. produce only bark E. produce new leaves
If the cell was a cube and you doubled the height, width, and length of the cell, how much would the volume increase?
A. 9-fold B. It would stay the same. C. 8-fold D. 4-fold E. 2-fold
The polymerase chain reaction (PCR) uses ________, nucleotides, and a heat-resistant DNA polymerase to rapidly
increase the number of molecules of a DNA fragment. Fill in the blank(s) with the appropriate word(s).