Question 7
1 pts
In Griffith's experiment, when mice were exposed to the heat killed S bacteria
that had been mixed with live R bacteria they died, even though live R
bacteria are the non-virulent strain.
What allowed the S strain of this bacteria to kill the mice? (select all that
apply)
a) the polysaccharide capsule around the bacterial cell
b) the mice infected with S bacteria have a deficient immune system
c) the S bacteria cannot be detected efficiently by the mouse's immune system
d) the S bacteria contains genes that attack the mouse's immune cells

Toorale man murder mystery < - your lab link 1. how was the toorale man found? 2. what did archaeologists learn about the burial? why is the burial important? 3. what information were the scientists able to learn from the skeleton itself? 4. why is the question of whether the injuries came from a stone or steel weapon important? how could scientists distinguish between the different types of weapons? 5. what did the carbon dating and soil testing tell scientists about toorale man? why are the dates interesting for scientists?

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.

What goes in and out of a cell respiration?