Base your answers to questions 69 and 70 on the information below and on your knowledge of biology.
scientists reprogram plants for drought tolerance
source: lancaster farming 2/21/15/aaas
arabidopsis plants respond to drought conditions by producing a stress hormone called aba. this hormone slows down plant growth and leads to a decrease in the plant’s use of water.
aba binds to specific receptors in the plant that cause the guard cells on the leaf surfaces to close the stomatal openings through which water vapor can normally pass. this reduces water loss during the drought conditions.
although it has been suggested that spraying plants with aba during a drought could be beneficial, it is not practical. the chemical is expensive to produce and quickly loses its ability to bind to cell receptors in the plant cells.
recently, however, scientists have found a way to modify the aba receptors in arabidopsis plants so they can be activated by another chemical that is both stable and inexpensive.
69 describe how the shape of molecules, such as the hormone aba, is critical to their function in the arabidopsis plant. [1]
70 explain how the response of the guard cells to a drought is part of a feedback mechanism. [1]

The us is not democratic (facts/data/information/reason to prove the us is undemocratic)

Which of the following tools can be used to determine humidity? select all that apply. barometer: hygrometers: anemometer: hair: thermometer

(adapted from m. m. duguid and j. a. goncalo, living large: the powerful overestimate their own height. ) in a study of power and self-image, participants were not told the true purpose of the study; instead, they believed they were participating in a business simulation. researchers randomly assigned participants to a high power(n = 44) or low-power (n = 44) condition. in the high-power condition, participants recalled a time when they had power over others, and in the low-power condition, they recalled a time when others had power over them. participants were asked to adjust the height (in centimeters) of an electronic graphical image (an avatar)of themselves to reflect their personal appearance. results indicated a statistically significant difference in participants’ perceptions of their own height across the two conditions. participants in the high-power condition created taller self-images (mean = 6.0, standard deviation = 1.5) than participants in the low-power condition(mean = 4.0, standard deviation = 1.0). * describe independent variable- describe how researchers measured the independent variable- explain why the researchers can conclude that there is a cause-and-effect relationship between the independent and dependent variables. - explain what statistical significance means in the context of the study.- explain why debriefing would be necessary in the study. -