The (Actinobacteria/alphaproteobacteria/Archaea) do not include any known pathogens.

Fill in the blank(s) with the appropriate word(s).


Archaea

Biology & Microbiology

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Modification enzymes typically methylate specific bases within the recognition sequence to prevent digestion of the nucleotide sequence by restriction endonucleases

Indicate whether the statement is true or false.

Biology & Microbiology

The simplest nervous system found in nature is the nerve net. An example of an organism that senses and responds to its environment with this ancient system would be

A. a jellyfish. B. a cockroach. C. an earthworm. D. a frog. E. a fiddler crab.

Biology & Microbiology

Which type of junctions prevent fluid leakage between cells?

a. gap junctions b. plasmodesmata c. tight junctions d. adhering junctions e. blocking proteins

Biology & Microbiology

How many molecules of CO2 are needed to generate one molecule of glucose?

A. 2 B. 3 C. 4 D. 5 E. 6

Biology & Microbiology