Which of the following cells or cell types has the greatest developmental potential?
A. fertilized egg
B. inner cell mass
C. gastrula
D. ectoderm
E. nerve cell
A
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Which of the following components is brought into a cell by HIV?
A) a DNA-dependent DNA polymerase B) RNA polymerase C) ribosome D) reverse transcriptase
Auxin is a plant hormone that causes cells to shorten and allow plant growing tips to move toward the sun.
Answer the following statement true (T) or false (F)
The following figure shows studies in a stream where enclosures were set up either with trout or with no trout. Which statement is a correct interpretation of the graph about trout, invertebrates, and algae? 
A. Trout do not seem to affect the algae production; only the invertebrate populations are affected. B. If trout are present in a system, algae production is low and invertebrate population levels are also low. C. Trout do affect the algae production but not the invertebrate populations. D. If trout are present in a system, algae production is high and invertebrate population levels are also high. E. If trout are present in a system, algae production is high and invertebrate population levels are low.