How many nucleotide bases does a codon consist of?
a. 3
b. 4
c. 6
d. 20
e. 64
a
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Which organism is used to initiate the fermentation of cabbage to make sauerkraut?
A. Propionibacterium B. Saccharomyces cerevisiae C. Streptococcus lactis D. Spirulina E. Leuconostoc mesenteroides
A cell moves sodium ions against its concentration gradient. This is an example of ____
a. active transport b. osmosis c. diffusion d. facilitated diffusionc e. diffusion through a channel
With the advent of photosynthesis and the subsequent production of oxygen by photosynthetic organisms, most of the anaerobic organisms present on Earth became extinct because oxygen was actually toxic to these organisms
Indicate whether the statement is true or false
Woodpeckers and squirrels both nest in tree cavities. This is an example of interspecific competition
Indicate whether the statement is true or false