Which of the following are most closely
related to the choanoflagellates?
a. animals
b. fungi
c. amoebozoans
d. algae
e. none of these
A
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During sporulation in Bacillus subtilis, the response regulator that positively controls many genes needed for sporulation and negatively controls genes not needed during sporulation is
A. SpoOB. B. SpoOF. C. SpoOC. D. SpoOA.
Which type of ion channel is shown in this illustration?
a. voltage sensitive ion channel
b. light sensitive ion channel
c. mechanosensitive ion channel
d. temperature sensitive ion channel
Many biologists feel that the first self-replicating organic systems were
a. types of RNA. b. forms of DNA. c. based on proteins. d. formed in space. e. plants.
In a population of Asian elephants, the death
rate equals the birth rate. This population has
a. reached its biotic potential. b. achieved zero population growth. c. not exceeded its carrying capacity. d. exponential growth. e. geometric growth.