70 year old man has a 3-month history of progressive weakness and a weight loss of 13 kg along with intermittent fever , chills and chronic cough productive of yellow sputum occasionally streaked with blood. A sputum specimen is obtained and numerous acid-fast bacteria are seen on the smear . 1. Which organism wold mont likely to Cause this syndrome?
2. Which vaccine is given against disease?
3. How can you catch the discase?

After reading the paragraph below, answer the questions that follow. researchers have created a robot that has a very thin leg that is moved by cardiac (heart) cells contracting in unison. the robot, made of a polymer similar to that used in making contact lenses, is bathed in heart cells with supporting cells, which then attach to the robot and provide movement as they contract. all of the cardiac cells working together can cause the robot leg to move in a way that individual cells could not. this is an example of a. emergent properties of cells. b. energy flow through an ecosystem. c. adaptation. d. internal environment regulation.

What organelle other than the nucleus houses dna in a eukaryotic cell?

In trying to determine whether dna or protein is the genetic material, hershey and chase made use of which of the following facts? a) dna contains sulfur, whereas protein does not. b) dna contains phosphorus, whereas protein does not. c) dna contains nitrogen, whereas protein does not. d) dna contains purines, whereas protein includes pyrimidines.