Although Desulfotomaculum species stain Gram-________ , these bacteria possess a cell wall more closely related to Gram-________ bacteria and are correctly placed in the low G + C Firmicutes.
What will be an ideal response?
negative; positive
negative positive
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Zero population growth is achieved
a. when a population reaches the carrying capacity of the environment. b. when emigration and immigration are balanced, and the number of births equals the number of deaths. c. anytime that births exceed deaths. d. anytime that deaths exceed births. e. when emigration and immigration are prevented.
When Bayliss and Starling conducted experiments to
determine what caused secretion of pancreatic juice, they a. cut the blood supply to the upper digestive tract. b. added acidic food to the small intestine and got secretions of pancreatic juices. c. cut the nerve supply to the upper digestive tract. d. got a response from the pancreas using extracts of cells lining the intestinal tract. e. did all of these except “cut the blood supply to the upper digestive tract.”
A(n) ________ involves drug testing on humans
Fill in the blank(s) with correct word
The origin of seeds occurred approximately ________ years ago.
A) 65 million B) 360 million C) 140 billion D) 3.5 billion