Scientists designed an experiment to determine if the transfer of a drought tolerant gene into a species of wheat plant was successful. They exposed 5,000 genetically modified wheat plants to drought conditions. The scientists also exposed 5,000 regular, unaltered wheat plants to drought conditions. They compared the amount of grain produced by each group of plants to see if the genetically modified wheat had higher yields than the regular wheat plants. What part of the experiment served as the dependent variable?

the number of plants
the number of plants

the amount of grain produced
the amount of grain produced

the regular wheat exposed to drought conditions
the regular wheat exposed to drought conditions

How can you approximate the number of calories required to keep you in energy balance?

One important development during the 3rd trimester that will insulate the infant against changes in temperature is a. the deposition of fat under the skin b. the closing of the septum between c. the atria of the heart d. the beginnings of lung functioning e. the beginnings of light and sound sensing

Mr. j, age 42, is a construction worker in las vegas. he recently noticed that a mole on his face seemed to be getting larger and darker. at first he did not worry because he was in the sun a lot and assumed the change may have been caused by sunburn. after a month, not only was the mole larger and darker, but it appeared to be “bumpy.” his doctor diagnosed a malignant melanoma skin cancer following biopsy of the nevus. mr. j reports pain in his right shin that does not go away when he puts his feet up or sleeps. discussion questions 1. relate mr. j’s skin changes to the warning signs for malignant melanoma. (see malignant melanoma.) 2. discuss the normal progression of this malignancy. what is the significance of the bone pain that mr. j is experiencing? (see malignant melanoma.) 3. discuss the treatment available for this patient and the prognosis for recovery. (see malignant melanoma.)