A plant secretes ____ when it needs to respond defensively to a pathogen.
A. salicylic acid
B. systemin
C. brassinosteroids
D. mineralocorticoids
E. nitric oxide
Answer: A
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The miRNA-RISC-mRNA complex enhances the translation efficiency of the mRNA transcript
A. true B. false
Which of the following is true of eukaryotic replication initiation?
A. Origins are identified in G2 of the cell cycle. B. The prereplication complex (preRC) assembles at the beginning of S phase. C. The initiator protein, or origin recognition complex (ORC), binds to the conserved elements of the ARS in G1. D. The helicase is a component of the replication complex (RC) but not the preRC. E. The RC forms in M phase of the cell cycle.
Which genera is included in the ciliates group?
a. Entamoeba b. Paramecium c. Trichomonas d. Anopheles
In the lab, you show that guppies under different predatory conditions change in rapid evolution. In the field, you wish to design an experiment that would generate data to support your observation. What experiment would best help you achieve your goal?
A. Transfer wild guppies from a predator-free pond into one with predators but no guppies; over time observe the guppies for physiological changes. B. Place predators from the lab into a pond free of other predators but with wild populations of guppies and monitor changes in physical traits. C. Create a mixed population of wild guppies and place them into a controlled environment with predators to record the genetic changes. D. Use the guppies from the lab and introduce them into a predator-rich pond free of wild populations of guppies; observe trait changes.