A gemma is a(n) sexual reproductive structure produced by certain liverworts
____________________ Indicate whether the statement is true or false.
False - asexual
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Which of the following will alter the frequency of alleles in the population the least?
A. Mutation B. Natural selection C. Genetic drift D. Migration E. All of the answers are equal
How does stomach acid assist the innate immune system?
a. The acid signals B cells to the site of infection. b. The acid signals T cells to the site of infection. c. The acid creates an inhospitable environment for pathogens to live. d. The acid breaks down the food sources, and the pathogen starves.
The film of fluid in the pleural cavity functions to:
a. nourish the lungs. b. rehydrate the lungs. c. provide lubrication between the lungs and thoracic wall. d. trap bacteria that may enter the lungs. e. inflate the lungs.
Where is the respiratory control center located?
A. in the lungs B. in the diaphragm C. in the brain D. in the bronchi E. in the aorta