Which factor would exert selection pressure on a population of insects?
A) a new species of bird in the area
B) a fire
C) an earthquake
D) the introduction of a population of feral cats into the area
A
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Which statement correctly describes BRCA?
a. Mutations to BRCA2 appear to be more lethal than mutations to BRCA1. b. It is an oncogene associated with breast cancer. c. It is a tumor suppressor gene associated with breast cancer. d. BRCA mutations are not inherited. e. BRCA is a proto-oncogene involved in breast tissue development.
O2 is transported from air in the lungs into the blood through the process of ____
a. active transport b. simple diffusion c. facilitated diffusion d. osmosis e. active transport
In birds, after fertilization but prior to the emergence of the chicks, the development of the fertilized egg is:
a. dimorphic. b. internal. c. ignored by both parents. d. external. e. variable.
The thermal death time for E. coli at 63°C was determined to be 20 minutes. Predict the affect on thermal death time if the temperature is increased to 67°C.
A) There will be no change in thermal death time. B) The thermal death time will be longer. C) There is not enough information to make this prediction. D) The thermal death time will be shorter.