When this exercise was written, the media campaign in support of golden rice was being launched. Search the Internet for the roots of the controversy over this genetically enhanced plant. Brie?y describe the bene?ts of, and the concerns over, its introduction to the rice-growing areas of the world.
What will be an ideal response?
There will be various responses. The general background is that golden rice was “invented” as a way to help solve hunger and malnutrition in third world countries. This is controversial because many question the science behind its creation, especially in light of the fact that there are plenty of cheap and natural alternatives.
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Which of the following generally causes stomata to open?
a. release of abscisic acid by the roots b. a drop in CO2 concentration in leaf air spaces c. exposure to red light d. a drop in O2 concentration in leaf air spaces e. an increase in CO2 concentration in the leaf air spaces
As the number of genes influencing a quantitative trait increases, the range of phenotypic variation is expected to increase
Indicate whether the statement is true or false
Which of the following types of reproductive barriers separates a pair of species that could interbreed but for the fact that one mates at dusk and the other at dawn?
A) temporal isolation B) habitat isolation C) behavioral isolation D) mechanical isolation
What actually begins the uterine contractions which leads to giving birth?
A. Oxytocin B. Prolactin C. Prostaglandins D. Estrogen E. The movement of the fetus