In which growth phase do bacteria adjust to their environment and grow little, if any?
A) stationary phase
B) habituation phase
C) lag phase
D) log phase
E) acculturation phase
Answer: C
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Some research has indicated that increased exercise is linked to increased telomere length in renewable tissues, like
blood. Assuming that telomerase levels are not increased by exercise, what might explain the increase in telomere length?
a. DNA replication occurred more frequently in individuals who exercised. b. Cell division occurred more rapidly in individuals who exercised. c. Telomerase activity was higher in individuals who exercised. d. Telomerase activity was lower in individuals who exercised. e. Fewer DNA replication errors occurred in individuals who exercised.
TRAIT SPECIESABCDE110000211111311111411110511100611000 The table shows the distribution of traits (A-E) in six extant species (1-6). A "0" indicates the ancestral condition, while a "1" indicates the derived condition. Which trait is represented by the greatest number of plesiomorphies?
A. A B. B C. C D. D E. E
The surface of each B lymphocyte is covered with about 250,000 to 500,000 identical copies of (BCR/MHC/TCR).
Fill in the blank(s) with the appropriate word(s).
The formal definition of ‘fitness' in evolutionary biology:
a. pertains to reproductive success. b. implies something is well matched or fit. c. Both of the above. d. Neither of the above.