Methanogens, thermophiles, and halophiles are unicellular organisms that thrive in very harsh conditions, such as hydrothermal vents and sulfur pools of water. Which kingdom would these prokaryotic organisms most likely belong to?

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.)

How did the average and range of beak size differ between birds that survived the drought and birds that dies?

As human red blood cells mature, they lose their nuclei. as a result of this loss, which process would be impossible for mature red blood cells to carry out?