Biochemical data suggest that eukaryotic cells are closer evolutionarily to the ______ than to the _____
Fill in the blank(s) with the appropriate word(s).
archaea
bacteria
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At the start of a study, 200 spotted owls lived in an old-growth forest patch in western Oregon. During the next year, a biologist tracking the birds observed that 25 new birds hatched and 5 died. What was the growth rate (r) for this year?
A) 25 B) 5 C) 20 D) 0.1 E) 200
The basic reproduction number of a pathogen
A) can vary during an epidemic based on infection control measures. B) can be determined experimentally in the lab. C) is usually high for pathogens that are transmitted through direct contact. D) can be determined experimentally and is usually high for pathogens that are transmitted through direct contact.
Rectal swab is:
a. acceptable. b. not acceptable.
How many coiled and fluid-filled ducts are found in each cochlea?
a. one b. two c. three d. four e. five or more