Many Bacteria isolated from nature are natural lysogens
Indicate whether the statement is true or false.
Answer: TRUE
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Which of the following is the strongest evidence that cytokinins regulate cell divisions? There is _____
A) an increase of cyclin gene expression in tissues exposed to cytokinin B) a decrease of cyclin gene expression in tissues exposed to cytokinin C) an induction of shoot growths in tissues exposed to cytokinin D) an induction of root growths in tissues exposed to cytokinin E) an ability of cytokinin to interact with auxin at the molecular level and change auxin biosynthesis and transport
Gene flow
a. has a homogenizing influence on a population. b. speeds up the divergence of two populations. c. increases the genetic variation between populations. d. is promoted by isolating mechanisms. e. promotes inbreeding.
Animals, like fiddler crabs, that are busiest at dawn or dusk are known as:
a. crepuscular. b. nocturnal. c. diurnal. d. lunar. e. asynchronous
What is the main organ for gas exchange in fish?
a. Lungs b. Respiratory system c. Gills d. Heart