What is the difference between a genetically modified organism and a transgenic organism?
A. A transgenic organism contains only genes from other species, while a genetically modified organisms contains genes from its own species and genes from other species.
B. A genetically modified organism is an organism that contains any foreign genes, while a transgenic organism has foreign genes that come from another species.
C. A transgenic organism is an organism that contains foreign genes, while a genetically modified organism has foreign genes that come from another species.
D. There is no difference between the two terms, they mean the same thing.
Answer: B
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Certain plants that grow in environments where their roots are often under water need to provide ways of getting which of the following to the roots?
A. carbon dioxide B. carbon monoxide C. hydrogen D. nitrogen E. oxygen
Most often, the largest gradient in water potential is between
A. roots and soil water. B. root xylem and shoot xylem. C. xylem and phloem. D. leaf cells and the intracellular spaces inside the leaves. E. the relative humidity inside the leaf and the relative humidity outside the plant.
The organism in the accompanying figure belongs to which group?
a. excavates b. alveolates c. stramenopiles d. green algae e. rhizarians
Which of the following explains how phloem sap moves within a plant?
A) cohesion-tension mechanism B) gravity pulls the phloem sap down C) pressure-flow mechanism D) transpiration